The 82nd Annual Meeting of the Meteoritical Society

and

Workshop on Minerals, Organics, and Water in 3D View

July 7–12, 2019

Sapporo, Hokkaido, Japan

Program and Abstracts

Workshop on Minerals, Organics, and Water in 3D View Sunday, July 7, 2019
11:00 a.m.	Conference Roon 1	Workshop: Minerals, Organics, and Water in 3D View
12:30 p.m.	Lobby of Conference Hall	Poster Session: Workshop: Minerals, Organics, and Water in 3D View
The 82nd Annual Meeting of the Meteoritical Society Monday, July 8, 2019
9:00 a.m.	Auditorium	Opening Ceremony
10:45 a.m.	Auditorium	Special Session: Ryugu, Bennu, and Small Bodies I
10:45 a.m.	Small Auditorium	Impact Processes from Earth to the Solar System
10:45 a.m.	Conference Room 1	Dynamical Evolution and Processes in the Solar Nebula
2:30 p.m.	Auditorium	Special Session: Ryugu, Bennu, and Small Bodies II
2:30 p.m.	Small Auditorium	Impacts on Earth: Infall to Craters
2:30 p.m.	Conference Room 1	Differentiated Meteorites I: Mostly HEDs
7:00 p.m.	Auditorium	Barringer Lecture
Tuesday, July 9, 2019
9:00 a.m.	Auditorium	Views of Mars from Meteorites, Analogs and Remote-Sensing
9:00 a.m.	Small Auditorium	Chondrules and Chondrites I
9:00 a.m.	Conference Room 1	Presolar Grains and the Origins of Isotopic Anomalies in Meteoritic Materials
2:30 p.m.	Auditorium	Chondrules and Chondrites II
2:30 p.m.	Small Auditorium	Meteorite Exposure Histories, Delivery, and Recovery
2:30 p.m.	Conference Room 1	Differentiated Meteorites II: From Primitive Achondrites to Irons
5:30 p.m.	Lobby of Conference Hall	Poster Session: Chondrules!
5:30 p.m.	Lobby of Conference Hall	Poster Session: Differentiated Meteorites I: Mostly HEDs
5:30 p.m.	Lobby of Conference Hall	Poster Session: Differentiated Meteorites II: From Primitive Achondrites to Irons
5:30 p.m.	Lobby of Conference Hall	Poster Session: Dynamical Evolution and Processes in the Solar Nebula
5:30 p.m.	Lobby of Conference Hall	Poster Session: Impacts Here, There, and Everywhere
5:30 p.m.	Lobby of Conference Hall	Poster Session: Meteorite Exposure Histories, Delivery, and Recovery
5:30 p.m.	Lobby of Conference Hall	Poster Session: Presolar Grains and the Origins of Isotopic Anomalies in Meteoritic Materials
5:30 p.m.	Lobby of Conference Hall	Poster Session: Special Session: Ryugu, Bennu, and Small Bodies
5:30 p.m.	Lobby of Conference Hall	Poster Session: Views of Mars from Meteorites, Analogs and Remote-Sensing
Wednesday, July 10, 2019
9:00 a.m.	Auditorium	Award Ceremony
Thursday, July 11, 2019
9:00 a.m.	Auditorium	Special Session: Analysis of Lunar Samples: A Celebration of 50 Years Since Apollo 11
9:00 a.m.	Small Auditorium	Carbonaceous Chondrites I: Components, Post-Accretion Histories, and Classification
9:00 a.m.	Conference Room 1	Refractory Inclusions
2:30 p.m.	Auditorium	Special Session: 50 Years of Japanese Antarctic Meteorites, Allende and Murchison
2:30 p.m.	Small Auditorium	Organic Matter in Meteorites
2:30 p.m.	Conference Room 1	Surface Processes on Airless Bodies
5:30 p.m.	Lobby of Conference Hall	Poster Session: Chondrites!
5:30 p.m.	Lobby of Conference Hall	Poster Session: Carbonaceous Chondrites: Components, Post-Accretion Histories, and Classification
5:30 p.m.	Lobby of Conference Hall	Poster Session: Microanalysis of Extraterrestrial Samples and Developments in Advanced Techniques
5:30 p.m.	Lobby of Conference Hall	Poster Session: Non-Carbonaceous Chondrites: Components, Post-Accretion Histories, and Classification
5:30 p.m.	Lobby of Conference Hall	Poster Session: Organic Matter in Meteorites
5:30 p.m.	Lobby of Conference Hall	Poster Session: Refractory Inclusions
5:30 p.m.	Lobby of Conference Hall	Poster Session: Surface Processes on Airless Bodies
5:30 p.m.	Lobby of Conference Hall	Poster Session: 1969: The Year of Japanese Antarctic Meteorites, Apollo 11, Murchison, and Allende
Friday, July 12, 2019
9:00 a.m.	Auditorium	Microanalysis of Extraterrestrial Samples and Developments in Advanced Techniques
9:00 a.m.	Small Auditorium	Carbonaceous Chondrites II: Components, Post-Accretion Histories, and Classification
9:00 a.m.	Conference Room 1	Non-Carbonaceous Chondrites: Components, Post-Accretion Histories, and Classification
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WORKSHOP: MINERALS, ORGANICS, AND WATER IN 3D VIEW

Sunday, July 7, 2019

9:00 a.m. Conference Room 1

Chairs: Luke Daly and Rosario Brunetto

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
11:00 a.m.		Welcome Address
11:05 a.m.	Ebel D. S. * Friedrich J. M.	Laboratory CT: A Revolution in Planetary Sample Petrology [#6118] Since 2000 non-synchrotron CT or “lab CT” has transformed geosciences. New findings about meteorites are enabled and will grow. AMNH and others offer experience. Vendors proliferate as software smartens up. Challenges loom but the future is bright!
11:35 a.m.	Hanna R. D. * Ketcham R. A. Zolensky M. Bale H. Sun J.	3D Crystallographic Orientation of Olivine in Bjurböle Chondrules [#6426] We use X-ray diffraction contrast tomography (DCT) to determine the 3D crystallographic orientation of olivine within two Bjurböle chondrules.
11:50 a.m.	Uesugi M. *	Integrated Synchrotron Radiation Computed Tomography System for the Analysis of Extraterrestrial Materials [#6280] We developed an integrated CT system for the analysis of extraterrestrial material. The system includes several setup with different spatial resolution, and combining with x-ray diffraction and phase contrast tomography.
12:20 p.m.		Poster Flash Talks
12:30 p.m.		LUNCH
1:45 p.m.	Tsuchiyama A. * Miyake A. Uesugi K. Takeuchi A. Nakano T. Matsuno J.	Syncrotron Radiation-Based Nano-Tomography for Extraterrestrial Materials [#6243] SR-based nano-tomography and its application to extraterrestrial materials particularly returned samples are reviewed.
2:15 p.m.	Yasutake M. * Vacarro E. Uesugi K. Takeuchi A. Nakano T. Takigawa A. Tsuchiyama A.	3D Observation of Porous Matrices in Primitive CM-CO Chondrites Based on SR-Nano-XCT Imaging [#6091] We conducted SR-nano-XCT to investigate the 3D structure of matrices of primitive CM-CO carbonaceous chondrites. It reveals the presence of whisker-like material, wide-spreading pores, and unique spherical components in the matrices.
2:30 p.m.	Friedrich J. M. * Sears D. W. G. Glavin D. P. Ebel D. S. Rivers M. L. McLain H. L. Sehlke A. Dworkin J. P. Sears H.	The Effect of X-Ray Microtomography Imaging on Amino Acids and Thermoluminescence in Chondrites [#6307] We describe a series of experiments that conclude μCT imaging causes minimal changes in the soluble organic compound (amino acid) content of a carbonaceous chondrite. We find that μCT changes the natural radiation record of a chondrite.
2:45 p.m.	Brunetto R. * Dionnet Z. Aléon-Toppani A. Baklouti D. Borondics F. Djouadi Z. King A. Nakamura T. Rubino S. Sandt C. Troadec D. Tsuchiyama A.	FTIR Micro-Tomography Coupled to X-CT on Extraterrestrial Materials [#6037] FTIR micro-tomography of extra-terrestrial materials allows the detection of mineral phases, water and organics, and their spatial co-localization in 3D. It is an efficient first-step in a multi-technique analytical sequence on returned samples.
3:15 p.m.		Coffee Break
3:30 p.m.	Jinnai H. *	Recent Developments in Electron Tomography and FIB/SEM Serial Sectioning for 3D Morphological Analysis in Polymer Composites [#6246] We discuss recent developments of 3D imaging techniques, such as electron tomography and FIB/SEM serial sectioning, and their applications to polymer composites.
4:15 p.m.	Daly L. *	Atom Probe Tomography in Planetary Science [#6286] An overview of atom probe tomography and its current applications in planetary science.
4:45 p.m.		Closing Remarks

Sunday, July 7, 2019

POSTER SESSION: WORKSHOP: MINERALS, ORGANICS, AND WATER IN 3D VIEW

12:30 p.m. Lobby of Conference Hall

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Authors (*Denotes Presenter)	Abstract Title and Summary
Zeigler R. A. Wilbur Z. E.	Using X-Ray Computed Tomography as a Tool for Preliminary Examination Tool of Current and Future Extraterrestrial Sample Return Missions [#6264] As part of the curation process, we have begun to scan Apollo and Antarctic Meteorite samples in order to find “new” subsamples that can be made available to the wider scientific community for study.
Master S. Bam L. Karfunkel J.	X-Ray Microtomography Shows Ellipsoidal Inclusion-Free Halo Around Cubic Phase in Brazilian Carbonado: First Strain Analysis of Pre-Solar Material? [#6110] We have studied with microfocus XRT a Brazilian carbonado with large (1 mm3) cubic grains surrounded by an inclusion-free halo. In probably the first strain analysis of pre-Solar material, we determine the strain to be oblate, with ~26% shortening.

THE 82ND ANNUAL MEETING OF THE METEORITICAL SOCIETY

Monday, July 8, 2019

OPENING CEREMONY

9:00 a.m. Auditorium

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
9:00 a.m.		Opening Ceremony
9:30 a.m.	Prof. Kazuhisa Goto (University of Tokyo)	[INVITED] Tsunami Geology and Geomorphology: Extreme Events in the Earth’s and Human Histories
10:30 a.m.		BREAK

Monday, July 8, 2019

SPECIAL SESSION: RYUGU, BENNU, AND SMALL BODIES I

10:45 a.m. Auditorium

Chairs: Harold Connolly Jr. and Seiji Sugita

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
10:45 a.m.	Nakamura T. * Watanabe S. Hirabayashi M. Hirata N. Hirata N. Noguchi R. Shimaki Y. Ikeda H. Tatsumi E. Yoshikawa M. Kikuchi S. Yabuta H. Tachibana S. Ishihara Y. Morota T. Kitazato K. Sakatani N. Matsumoto K. Wada K. Senshu H. Honda C. Michikami T. Takeuchi H. Kouyama T. Honda R. Kameda S. Fuse T. Miyamoto H. Komatsu G. Sugita S. Okada T. Namiki N. Arakawa M. Ishiguro M. Abe M. Gaskell R. Palmer E. Barnouin O. S. Michel P. French A. S. McMahon J. W. Scheeres D. J. Abell P. A. Yamamoto Y. Tanaka S. Shirai K. Matsuoka M. Yamada M. Yokota Y. Suzuki H. Yoshioka K. Cho Y. Tanaka S. Nishikawa N. Sugiyama T. Kikuchi H. Hemmi R. Yamaguchi T. Ogawa N. Ono G. Mimasu Y. Yoshikawa K. Takahashi T. Takei Y. Fujii A. Hirose C. Iwata T. Hayakawa M. Hosoda S. Mori O. Sawada H. Shimada T. Soldini S. Yano H. Tsukizaki R. Ozaki M. Iijima Y. Ogawa K. Fujimoto M. Ho T.-M. Moussi A. Jaumann R. Bibring J.-P. Krause C. Terui F. Saiki T. Nakazawa S. Tsuda Y.	Hayabusa2: Current Summary [#6306] Hayabusa2 is the 2nd Japanese sample return mission from C-type asteroid 162173 Ryugu. Recently we succeeded the first touch down onto a site on the equatorial ridge. Achievement so far will be introduced in the presentation.
11:00 a.m.	Sugita S. * Honda R. Morota T. Kameda S. Sawada H. Tatsumi E. Honda C. Yokota Y. Yamada M. Kouyama T. Sakatani N. Suzuki H. Yoshioka K. Hayakawa M. Cho Y. Matsuoka M. Hirata N. Hirata N. Domingue D. Miyamoto H. Kikuchi H. Hemmi R. Michikami T. Barnouin O. S. Ernst C. M. Palmer E. Gaskell R. Michel P. Hirabayashi M. Jaumann R. Otto K. Schmitz N. Schroeder S. E. Hiroi T. Nakamura T. Komatsu G. Yoshikawa M. Tanaka S. Shirai K. Watanabe S. Tsuda Y.	Ryugu’s Parent-Body Processes Estimated from Hayabusa2 Multi-Band Optical Observations [#6366] Hayabusa2 observations revealed that that boulders on asteroid Ryugu have spectra very similar to each other, suggesting an uniform interior of its parent body. This is consistent with radiogenic heating than impact-induced heating.
11:15 a.m.	Hamilton V. E. * Simon A. A. Christensen P. R. Reuter D. C. Emery J. P. Kaplan H. H. Clark B. E. Lauretta D. S. OSIRIS-REx Team	Spectral Characterization of (101955) Bennu from OSIRIS-REx Observations [#6357] The surface of Bennu is dominated volumetrically by hydrated minerals and is spectrally consistent with CI and CM carbonaceous chondrites. Variations in spectral signatures may be related to space weathering, particle size, and/or composition.
11:30 a.m.	Hanna R. D. * Haberle C. W. Hamilton V. E. Lee M. R. King A. J. Lindgren P. Howell E. S. Molaro J. L. Kaplan H. H. Abreu N. Friedrich J. M. Lauretta D. S. the OSIRIS-REx team	Bennu: An Aqueously Altered and Mildly Heated CM Carbonaceous Asteroid [#6443] We explore the spectral evidence for mildly heated, aqueously altered CM material on Bennu.
11:45 a.m.	Takir D. * Kitazato K. Milliken R. E. Iwata T. Abe M. Ohtake M. Matsuura S. Arai T. Nakauchi Y. Nakamura T. Matsuoka M. Senshu H. Hirata N. Hiroi T. Pilorget C. Brunetto R. Poulet F. Riu L. Bibring J.-P. Domingue D. L. Vilas F. Barucci M. A. Perna D. Palomba E. Galiano A. Tsumura K. Osawa T. Komatsu M. Nakato A. Arai T. Takato N. Matsunaga T. Takagi Y. Matsumoto K. Kouyama T. Yokota Y. Tatsumi E. Sakatani N. Yamamoto Y. Okada T. Sugita S. Honda R. Morota T. Kameda S. Sawada H. Honda C. Yamada M. Suzuki H. Yoshioka K. Hayakawa M. Ogawa K. Cho Y. Shirai K. Shimaki Y. Hirata N. Yamaguchi A. Ogawa N. Terui F. Yamaguchi T. Takei Y. Saiki T. Nakazawa S. Tanaka S. Yoshikawa M. Watanabe S. Tsuda Y.	Spectral Characteristics of Asteroid (162173) Ryugu with Hayabusa2 NIRS3 [#6096] We report recent results of the surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy.
12:00 p.m.	Okada T. * Fukuhara T. Tanaka S. Taguchi M. Arai T. Sakatani N. Shimaki Y. Senshu H. Demura H. Ogawa Y. Suko K. Sekiguchi T. Kouyama T. Helbert J. Mueller T. G. Hagermann A. Biele J. Grott M. Hamm M. Delbo M.	Thermal Inertia of C-Type Near-Earth Asteroid 162173 Ryugu Determined from the Dawn Side Observations by Thermal Infrared Imager [#6303] Thermal inertia of C-type asteroid Ryugu is determined using the data observed at the dawn side by the thermal infrared imager TIR onboard Hayabusa2, consistent with the value derived from the daytime observations and with the ground observations.
12:15 p.m.	Yabuta H. * Ikehara M. Tatsumi E. Sugita S. Yamashita S. Mogi K. Amano K. Matsuoka M. Kobayashi S. Nakamura T.	Relationship Between Visible Reflectance at 550 nm and Carbon Contents in Carbonaceous Chondrites: Attempt to Estimate the Bulk Carbon Contents of Asteroid Ryugu’s Surface [#6337] In order to estimate bulk carbon contents of asteroid Ryugu’s surface, correlation between reflectance spectra and total carbon contents of primitive-, thermally metamorphosed-, and experimentally heated-carbonaceous chondrites were investigated.
12:30 p.m.	Connolly H. C. Jr. * Jawin E. R. Ballouz R. L. Walsh K. J. McCoy T. J. DellaGiustina D. N. Burke K. Biehaus E. B. Rizk B. d’Aubigny C. Hamilton V. E. Bottke W. F. Dworkin J. P. Delbo M. Tachibana S. Yurimoto H. ORISIS-REx Team	OSIRIS-REx Sample Science and the Geology of Active Asteroid Bennu [#6209] The OSIRIS-REx spacecraft went into orbit about (101955) Bennu on 31 December 2018. Herein we report on the surface geology of Bennu with a goal of contextualizing the nature of the future returned sample.

Monday, July 8, 2019

IMPACT PROCESSES FROM EARTH TO THE SOLAR SYSTEM

10:45 a.m. Small Auditorium

Chairs: Naotaka Tomioka and Thomas Sharp

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
10:45 a.m.	Brasser R. * Werner S. C. Mojzsis S. J.	Dynamical Impact Bombardment Chronology of the Terrestrial Planets from 4.5 Ga to 3.5 Ga [#6052] We combine dynamical and Monte Carlo simulations to study late accretion on the inner planets. The bombardment intensity and decline match the calibrated cratering chronology proposed by Werner et al. (2014). Cosmochemical implications are discussed.
11:00 a.m.	Shikina R. S. * Mikouchi T. M.	Heating Experiments of Maskelynite in Zagami and Elephant Moraine A79001: Implications for Their Relative Shock Degrees [#6367] We performed heating experiments (900 and 1000 °C for 1–168 hours) of maskelynite in Zagami and EETA 79001 and found slightly different volumes of recrystallized plagioclase. This probably reflects higher shock pressure of EETA 79001 than Zagami.
11:15 a.m.	Kurosawa K. * Genda H. Niihara T. Kayama M. Koike M. Mikouchi T. Sano Y. Matsui T.	Enhancement of the Degree of Impact Heating in Pressure-Strengthened Rocks [#6315] We investigated the effects of material strength on the degree of impact-induced heating by using a shock physics code. We found that low-velocity impacts (<10 km/s) leads to a much larger degree of impact heating than previously expected.
11:30 a.m.	Sharp T. G. * Hu J.	Shock Veins in Meteorites: What They Tell Us About Shock Conditions [#6463] The usefulness of shock veins for interpreting shock conditions is debated. Here we calculate shock-temperatures and quench paths to semi-quantitatively evaluate the relationship between shock-melt crystallization and shock pressure.
11:45 a.m.	Tomioka N. * Okuchi T. Miyahara M. Iitaka T. Purevjav N. Tani R. Kodama Y.	Topotaxial Intergrowths of Epsilon-(Mg,Fe)2SiO4 in Wadsleyite and Ringwoodite in Shocked Chondrites [#6007] We report natural occurrence of a new high-pressure polymorph of olivine in shocked chondrites based on transmission electron microscopy and evaluation of its crystal structure and stability by the first principles calculations.
12:00 p.m.	Langenhorst F. * Adelhardt E. Mansfeld U. Liermann H. P.	Dynamic Compression and Phase Transformations of Baddeleyite in Synchroton-based Diamond Anvil Cell Experiments [#6503] We present synchroton XRD results of dynamic DAC experiments on baddeleyite, aiming at simulating the effects of shock compression. The DAC experiments allowed to reproduce known shock-induced transformations to orthorhombic phases.
12:15 p.m.	Pittarello L. * Daly L. Ferrière L. Chung P. Pickersgill A. E. Lee M. R.	Twinning and Amorphization in Naturally Shocked Plagioclase: An EBSD Study [#6276] Shock-induced amorphization of plagioclase is initiated along micro-twins and is controlled by their crystallographic orientation. Can we consider these micro-twins the equivalent of planar deformation features in plagioclase?
12:30 p.m.	Tielke J. A. * Peslier A. H. Christoffersen R. Erickson T. Cintala M. J. Morris R. V. Montes R. Cline C. J.	Hydrogen Mobility During Shock Deformation in Olivine [#6453] We carried out impact experiments on olivine crystals to investigate H mobility during shock. Our results reveal H diffusion along dislocations is the dominant transport mechanism. Minor changes in H storage are observed in shocked olivine.

Monday, July 8, 2019

DYNAMICAL EVOLUTION AND PROCESSES IN THE SOLAR NEBULA

10:45 a.m. Conference Room 1

Chairs: Rachel Smith and Justin Simon

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
10:45 a.m.	Smith R. L. * Blake G. A. Pontoppidan K. M. Boogert A. C. A.	Temporal Variability in Carbon Monoxide Abundances in Young Stellar Objects and Implications for the Early Solar System [#6486] We present initial findings in exploring short-term variability of molecular reservoirs observed toward a range of YSOs. Thus far we find that CO isotopologue abundances may vary more significantly in massive versus solar-type protoplanetary systems.
11:00 a.m.	Wasson J. T. *	Further (Petrographic) Evidence that CV CAIs had a Presolar Origin [#6508] Isotopic compositions show that CAIs cannot be made from the same stuff as chondrites. If they formed in the solar system, ^26Al/^27Al ratios require them to have formed about 2 Ma earlier than chondrules. They do not show igneous rims, and are the last materials accreted to the CV formation region.
11:15 a.m.	Nuth J. A. III * Abreu N. M. Clark B. Johnson N. M. Glavin D. P.	Do We Need a New Definition for a Comet? [#6452] Forming as a continuum of dry asteroids to wet comets, mixed thoroughly by the Nice-Grand Tack. Rocks now reside in the Oort Cloud and comets in the Main Belt - all tempered by 4 billion years of metamorphism.
11:30 a.m.	Simon J. I. * Armytage R. M. G. Tappa M. J.	Non Mass-Dependent Calcium Isotope Effects In and Among Planetary Materials [#6419] Improved non mass-dependent calcium isotope measurements are being made for planetary materials and their components in order to study the formation of rocky bodies in the protoplanetary disk.
11:45 p.m.	Alexander C. M. O’D. *	A Chondrule Earth? [#6500] It is suggested that the Earth formed from material that was produced by similar processes to CC chondrules and refractory inclusions in an isotopically heterogeneous nebula.
12:00 p.m.	Woo J. M. Y. * Brasser R. Matsumura S. Mojzsis S. J. Ida S.	The Curious Case of Mars’ Formation [#6088] We tested N-body dynamical models in reproducing the isotopic composition differences between Earth and Mars. We found that the Classical model works better than the Grand Tack model only if we include massive Mars analogues from N-body simulations.

Monday, July 8, 2019

SPECIAL SESSION: RYUGU, BENNU, AND SMALL BODIES II

2:30 p.m. Auditorium

Chairs: Timothy McCoy and Toru Yada

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
2:30 p.m.	McCoy T. J. * Connolly H. C. Jr. Corrigan C. M. Jawin E. R. Sandford S. Molaro J. DellaGiustina D. N. Rizk B. Nolan M. C. Lauretta D. S. the OSIRIS-REx Team	Brecciated Boulders: Evidence for Impact Mixing on Bennu’s Parent Body [#6428] Meter-sized boulders on asteroid Bennu appear to be genomict breccias, consistent with widespread formation of regolith breccias among hydrated carbonaceous chondrites. These meter-sized boulders likely required processes on Bennu’s parent body.
2:45 p.m.	Nakamura-Messenger K. Connolly H. C. Jr. Lauretta D. S. Messenger S. *	The OSIRIS-REx Science Value Map of Asteroid Bennu [#6188] We will present observations of Bennu that are being used to assess the relative science value of candidate sampling sites and will discuss methods the team is using to integrate these observations into science value scores.
3:00 p.m.	Yada T. * Abe M. Nakato A. Yogata K. Sakamoto K. Nishimura M. Okada T. Yoshitake M. Kumagai K. Iwamae A. Furuya S. Hayashi T. Yamamoto D. Tachibana S. Yurimoto H.	Preparation for Curating Samples Recovered from C-Type Asteroid Ryugu by Hayabusa2 and Present Status of Curation of Samples Returned from S-Type Asteroid Itokawa by Hayabusa [#6351] Hayabusa2, which should have recovered surface materials on C-type asteroid Ryugu in last Feb., will return them to the Earth at the end of 2020. Most of the apparatuses for their handling and initial description have been prepared in these years.
3:15 p.m.	Bibring J-P. Brunetto R. Hamm V. Matsuoka M. MoussiSoffys A. Nakamura T. Nakato A. Okada T. * Pilorget C. Riu L. Yada T. Yogata K.	Compositional Characterization of the Hayabusa 2 Returned Samples with MicrOmega, Within the Curation Facility [#6177] The composition of the Hayabusa2 returned samples will be characterized, within the curation facility, by hyperspectral near infrared microscopy, using the MicrOmega instrument.
3:30 p.m.	Ito M. * Tomioka N. Uesugi M. Uesugi K. Ohigashi T. Yamaguchi A. Imae N. Karouji Y. Shirai N. Yada T. Abe M.	The Ryugu Grain Analysis: Approach by the Phase 2 Curation “Team Kochi” [#6082] We, the Phase2 curation team “Kochi”, report a plan of the coordinate micro-analysis for the Ryugu grain. We will show progress of analytical techniques and devices based on recent repots by the Hayabusa 2 spectroscopic studies.
3:45 p.m.	Potin S. * Beck P. Bonal L. Usui F. Vernazza P. Schmitt B.	Investigation of the Hydration Features of Asteroids with Carbonaceous Chondrites: Experimental Analysis and Comparison with Astronomical Observations [#6023] We investigated the effect of heating on the reflectance spectra of carbonaceous chondrites, with focus on the hydration features. We then compare our spectra with astronomical observations of Ryugu, Bennu and Main Belt Asteroids.
4:00 p.m.	Piani L. * Marrocchi Y. Vacher L. G. Piralla M. Bizzarro M. Alexander C. M. O’D. Howard K. T.	Hydrogen Isotopic Composition of Water in Hydrated Chondrites [#6135] Using in situ analyses by SIMS, we estimated the D/H composition of water in different groups and types of chondrites to constrain the isotopic distribution of water in the protoplanetary disk at the time and places of asteroid formation.
4:15 p.m.	Harries D. * Fürst R. Langenhorst F.	Thermal Release of Water from CM2 Chondrites: Insight from Mass Spectrometric Evolved Gas Analysis (DEGAS) [#6361] We have studied the thermal release of water from Murchison, Jbilet Winselwan and reference minerals using a custom-build mass spectrometric system. Significant differences are observed among the two, confirming water-loss in Jbilet Winselwan.
4:30 p.m.	Hilchenbach M. * Paquette J. Fischer H. Stenzel O. Merouane S.	Heterogeneity of Cometary Dust Particles in the Coma of Comet 67P [#6215] The COmetary Secondary Ion Mass Analyser (COSIMA) instrument on board ESA’s Rosetta mission to comet 67P/Churyumov–Gerasimenko has collected and analysed dust particles in-situ in the inner coma from August 2014 to September 2016.
4:45 p.m.	Arai T. * DESTINY+ Team	DESTINY+: Flyby of Asteroid (3200) Phaethon and In-Situ Dust Analyses [#6497] DESTINY+ is a mission for flyby of Geminids parent asteroid Phaethon and in-situ dust analyses.
5:00 p.m.	Glavin D. P. * Squyres S. W. Nakamura-Messenger K. Hayes A. G. Mitchell D. F. Moran V. E. Houghton M. B. Douglas-Bradshaw D. Lauretta D. S. Messenger S. Yamada K. Okazaki S. Satoh Y. Maru Y. Nakao T. Kukita A. Shimoda T. Yamawaki T. Nakamura T. Parker J. E. Wegel D. C. Peabody H. L. Dworkin J. P. Nguyen A. N. Clemett S. Zega T. J. Mazarico E. Rowlands D. Aslam S. A. Gorius N. Quilligan G. Furukawa Y. Kimura Y. Takigawa A. Blake G. Mumma M. J. Milam S. N. Gerakines P. A. Lunine J. I. Mitchell J. L. Pace L. F. Herd C. D. K. Gorevan S. Spring J. Zacny K. Chu P. C. Hasegawa M. M. Guttler C. Sierks H. Vincent J. B. Oklay N. Campins H. Fernandez Y. Makowski J. Oberg D. Morse E. L. Soderblom J. M. Bodewits D. Kelley M. Davidsson B. Johnson J. Kulchitsky A. Kirk R. Leshin L. Oberg K. Ravine M. CAESAR Project Team	Overview of the Comet Astrobiology Exploration Sample Return (CAESAR) New Frontiers Mission [#6002] The Comet Astrobiology Sample Return (CAESAR) New Frontiers mission will acquire and return to Earth for laboratory analysis a minimum of 80 grams of surface material, including volatiles, from the surface of comet 67P/Churyumov-Gerasimenko.
5:15 p.m.	Kelley M. S. * Landis R. R. Reddy V.	Planetary Defense Exercises with Real Asteroids: 2012 TC4 and 1999 KW4 [#6410] We summarize results from two planetary defense exercises involving real near-Earth asteroids. An observing campaign with 2012 TC4 was used as an end-to-end planetary defense exercise, while a campaign with 1999 KW4 focused on characterization.

Monday, July 8, 2019

IMPACTS ON EARTH: INFALL TO CRATERS

2:30 p.m. Small Auditorium

Chairs: Bingkui Miao and Gunther Kletetschka

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
2:30 p.m.	Soens B. * van Ginneken M. Debaille V. Vanhaecke F. Claeys Ph. Goderis S.	Microtektites from the Sør Rondane Mountains, East Antarctica: Towards an Extension of the Australasian Strewn Field? [#6144] We report the discovery of ca. 30 microtektites in sediment traps from the Sør Rondane Mountains, East Antarctica. Based on their physical and chemical properties, we suggest that they extend the western-most lobe of the Australasian strewn field.
2:45 p.m.	Campanale F. Mugnaioli E. Folco L. * Gemmi M. Lee M. R. Daly L. Glass B. P.	Evidence for Subsolidus Quartz-Coesite Transformation in Impact Ejecta from the Australasian Tektite Strewn Field [#6152] We present evidence for direct solid-state quartz-to-coesite transformation in shocked coesite-bearing quartz ejecta from the Australasian tektite/microtektite strewn field. These findings contradict conventional models for coesite formation.
3:00 p.m.	Xiao Z. * Ma Y. Yan P. Pu J. Kenkmann T. Wulf G. Cui J.	The Spatial Density of In-Situ Australasian Tektites in Southern China [#6166] We report the line density of possible in-situ tektites collected from the southern China.
3:15 p.m.	Hildebrand A. R. *	The Australasian Tektite Strewn Field (Highly Oblique) Source Impact is in Champasak Province, Laos [#6489] The source craters of the Australasian tektite strewn field are two small elliptical craters (named Champasak A and B) in southern Laos resulting from a highly oblique impact. The larger crater’s melt sheet is similar to average tektite composition.
3:30 p.m.	Van Ginneken M. * Artemieva N. Claeys P. Debaille V. Decrée S. Hecht L. Yang S. Kaufmann F. Soens B. van Maldeghem F. Humayun M. Goderis S.	Meteoritic Ablation Debris from the Sør Rondane Mountains, Antarctica [#6010] We report the discovery of meteoritic ablation debris in the Sør Rondane Mountains, Antarctica. Chemical properties show that they formed during a large airburst event in the lower atmosphere.
3:45 p.m.	McMullan S. * Collins G. S. Davison T. M.	Asteroid to Airburst; Comparing Semi-analytical Airburst Models to Hydrocodes [#6354] Atmospheric entry models of decametre size asteroids need to be quick and accurate. Semi-analytical models are fast but make many assumptions. Hydrocodes make fewer assumptions, but computationally expensive. Can semi-analytical models be refined?
4:00 p.m.	Miao B. * Wang Y.	The Shock Effects of Granitic Impactite from Aletai Iron Meteorite, Xinjiang, China [#6031] A new kind of granitic impactite from Aletai iron meteorite is found. It is the product by the impact of iron meteorite directly on granite rock base. Here the shock effects are introduced, the condition of the impact is estimated and the target rock is discussed.
4:15 p.m.	Lambert P. * CIRIR Consortium	“Mission to Rochechouart” Project: A Review [#6446] The “Mission to Rochechouart” project was presented at the MetSoc meeting in Casablanca 5 years ago. We report on what has been achieved since its announcement, and what will be achieved in the future.
4:30 p.m.	Selkirk S. * Gibson R. L. Tshibubudze A.	Evolving Strain Patterns During Impact in the World’s Largest Central Uplift — Evidence for Declining Strain Rate and Strain Localisation Within Minutes [#6480] Evolving strain patterns during impact in the Vredefort Dome – evidence for declining strain rate and strain localisation using marker horizons and palinpastic restoration.
4:45 p.m.	Baratoux D. * Niang C. A. B. Reimold W. U. Sapah M. S. Jessell M. W. Faye G. Bouley S. Vanderheaghe O.	Bosumtwi Impact Structure, Ghana: Evidence for Fluidized Emplacement of the Ejecta [#6485] This presentation will focus on recent field observations and remote sensing analyses of the Bosumtwi impact structure demonstrating that the Bosumtwi impact crater shares many characteristics with the rempart craters on Mars.
5:00 p.m.	Kletetschka G. * Kavková R. Navátil T. Takác M. Prach J. Vondrák D. Stuchlik E. Štorc R. Švecová E. Horická Z. Klokocník J. Kostelecký J. Bezdek A. Rogozin D. Y. Meydus A. Krivobokov L. Mukhortova L. Darin A. V. Serra R. Stanghellini C. Gladysheva O. G.	New Implications for Tunguska Explosion Based on Magnetic, Dendrological, and Lacustrine Records [#6506] Tunguska layer in the Zapoviednoe lake resembles clay. While the content of Fe dropped (160ppm-19ppm) the mag. susc. increased 2-fold. This is a record of quick and intense burst of energy, melting and vaporizing the dust, forming nanophase Fe.
5:15 p.m.	Master S. * Cooper G. R. J. Chakraborti T. M. Mukherjee T.	First Evidence for an Impact Origin of the >45 km Diameter Simlipal Ring Structure, Singhbhum Craton, Odisha, India [#6079] The Simlipal ring structure consists of basalts interbedded with quartzites, with a differentiated mafic-ultramafic intrusion in the center. Striated partial shatter cones are the first macroscopic evidence for an impact origin of the structure.

Monday, July 8, 2019

DIFFERENTIATED METEORITES I: MOSTLY HEDS

2:30 p.m. Conference Room 1

Chairs: Qingzhu Yin and David Mittlefehldt

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
2:30 p.m.	Ono H. * Takenouchi A. Mikouchi T. Yamaguchi A.	Tridymite Polymorph in Cumulate Eucrites Indicating Their Thermal Histories [#6241] We studied tridymite polymorphs in 3 cumulate eucrites to understand thermal histories below 400 C. We found orthorhombic tridymite lamellae in the monoclinic host in Moama, suggesting its faster cooling at low temperature than other 2 samples.
2:45 p.m.	Warren P. H. *	Two Unbrecciated, Vesicular, Possibly Paired Eucrites, Both Totally Unmetamorphosed and Extraordinarily Sodium-Rich: Northwest Africa 7035 and Northwest Africa 8661 [#6509] Two eucrites from Northwest Africa are remarkably alike in many ways, including vesicularity, low metamorphism, and high sodium.
3:00 p.m.	Yin Q. Z. * Zhou Q. Sanborn M. E. Ziegler K. Li Q. L. Liu Y. Li C. L.	Petrography and U-Pb Chronology of Anomalous Eucrite Serra Pelada [#6051] Serra Pelada is a brecciated eucrite. The latest petrography studies have described this meteorite as a monomict eucritic breccia. Here we report the petrography and zircon U-Pb dating results for this new meteorite.
3:15 p.m.	Kanemaru R. * Imae N. Yamaguchi A. Nishido H.	Shock Metamorphic Degree of Eucrites Based on the Textual and XRD Analyses [#6347] We performed the XRD analyses of basaltic and cumulate eucrites. The macro XRD data of eucrites has correlations for the shock degrees estimated from the petrographic study.
3:30 p.m.	Mitchell J. T. * Tomkins A. G.	Compositional Diversity of Orthopyroxenitic Diogenites and Olivine-Bearing Diogenites Linked to Variable fO2 and Post-Eucritic Magmatism [#6065] Modelling of orthopyroxene compositions shows that observed diogenite trends may be the result of heterogeneous source fO2 combined with prior eucrite extraction. As such, diogenites represent crustal intrusions and no magma ocean cumulates.
3:45 p.m.	Saito T. * Hidaka H. Lee S.-G.	^176Lu–176Hf and 87Rb–*87|Sr Systematics and Rare Earth Element Abundances of Diogenites: Evidence for Their Crystallization from Partial Melts of the Vestan Mantle [#6233] We applied ^176Lu–^176Hf decay system on diogenites and obtained the age and initial ^176Hf/^177Hf ratio of them. Alhough the age of diogenites is identical to that of eucrites with in the error range, the initial ratio shows significant discrepancy.
4:00 p.m.	Mittlefehldt D. W. * Buckley W. P.	The Vestan Regolith: Petrologic-Chemical Study of HED Polymict Breccias [#6391] Regolith mixing processes on asteroid (4) Vesta are examined through petrologic and bulk-compositional analyses of polymict eucrites, polymict diogenites and howardites.
4:15 p.m.	Guo Z. * Liu J. Qin L. Gannoun M. Boyet M. Zajacz Z. Bouvier A.	Sm-Nd, Lu-Hf and Mn-Cr Compositions of Eucrite, Diogenite and Ungrouped Achondrites: Implications for the Formation and Sources of Differentiated Planetesimals [#6352] The Sm-Nd and Lu-Hf chemistry were conducted in superclean lab in The University of Western Ontario. Unspiked isotopic analyses of Sm and Nd on all samples, and Mn-Cr analyses on NWA 12338 are ongoing.
4:30 p.m.	Haba M. K. * Wotzlaw J. F. Lai Y.-J. Yamaguchi A. Schönbächler M.	Chronological Evidence for Mesosiderite Formation on Vesta by a Hit-and-Run Collision [#6242] First comprehensive U-Pb dating of mesosiderite zircons revealed that the crust formation occurred 4,558.5 Myr ago followed by silicate-metal mixing at 4,525.4 Myr. We propose mesosiderite formation on Vesta based on these zircon dates.
4:45 p.m.	Deligny C. * Füri E. Deloule E.	Origin and Timing of Volatile (N, H) Delivery to the Angrite Parent Body [#6045] We measured, for the first time, the N content and isotopic ratio (^15N/^14N) of glass inclusions, interstitial glasses, and silicate minerals in D’Orbigny and Sahara 99555 by in-situ high-resolution secondary ionization mass spectrometry.
5:00 p.m.	Hayashi H. * Mikouchi T. Bizzarro M.	Crystallization History of Northwest Africa 7203 Angrite [#6153] Mineralogy of the NWA 7203 angrite suggests unusual crystallization history: fine-grained areas rapidly crystallized with Mg-rich olivine xenocrysts as seeds, then the melt became Mg-rich (magma mixing?), and finally coarse-grained areas formed.
5:15 p.m.	Schiller M. * Bizzarro M. Siebert J.	Iron Isotope Evidence for Very Rapid Accretion and Differentiation of the Proto-Earth [#6255] We report nucleosynthetic Fe isotope signatures for all major meteorite classes and use these data to infer the driving growth mechanism, collisional versus pebble accretion, of the proto-Earth.

Monday, July 8, 2019

BARRINGER LECTURE

7:00 p.m. Auditorium

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Times	Guest Lecturer	Presentation
7:00 p.m.	Prof. Kazuyuki Shiraishi (National Institute of Polar Research)	[INVITED] The Search for Antarctic Metorites — Fifty Years from the Discovery of the Yamato Meteorites”

Tuesday, July 9, 2019

VIEWS OF MARS FROM METEORITES, ANALOGS AND REMOTE-SENSING

9:00 a.m. Auditorium

Chairs: Minako Righter and John Bridges

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
9:00 a.m.	Bouvier L. C. * Schiller M. Fehr M. Costa M. Connelly J. N. Nemchin A. Schonbachler M. Bizzarro M.	Probing Magma Ocean Crystallization in Rocky Planets Using Zirconium Isotopes — Preliminary Results from Ancient Zircons from Earth and Mars [#6362] We report the ^92Nb-^92Zr systematics of ancient zircons from Earth and Mars dating back to the planets’ earliest histories. We show the presence of small resolvable deficits in ^92Zr indicative of early formation of reservoirs with subchondritic Nb/Zr.
9:15 a.m.	Tomkins A. G. * Alkemade S. L. Nutku S.	Mysteriously Missing Martian MIF-S [#6063] We use SIMS to examine the MIF-S signatures of martian meteorites, including basaltic breccia NWA 8171, and combine with LA-ICP-MS of sulfides for PGE abundance. We discuss why non-zero MIF-S is not seen in NWA 8171 and other martian meteorites.
9:30 a.m.	Bellucci J. J. * Whitehouse M. J. Nemchin A. A.	Tracing Martian Surface Interactions with the Triple O Isotopic Compositions of Meteoritic Phosphates [#6319] The triple O compositions of phosphates from six martian meteorites has been measured by SIMS and will be used to constrain interactions with the martian surface recorded by these minerals and define the O-isotope composition of the surface of Mars.
9:45 a.m.	Lin Y. T. * Hu S. Yamaguchi A. Zhang J. C. Hao J. L. Yang W.	Global Presence of Subsurface Glacier on Mars: Evidence from the Correlation Between Water Contents and D/H Ratios of Martian Meteorites [#6238] The water contents and D/H ratios of melt inclusions of all 6 shergottites show mixing of martian mantle and underground water. The water was likely produced by melting of the global reservoir of subsurface glacier with delta D of 5300–6000 per mil.
10:00 a.m.	Davidson J. * Wadhwa M. Hervig R. L.	Water on Mars: Insights from Nominally Anhydrous Pyroxene in Nakhla and Northwest Africa 7034 [#6198] We report water contents and H isotopic compositions of pyroxene in the martian clinopyroxenite Nakhla and the regolith breccia NWA 7034.
10:15 a.m.	Wadhwa M. * Stephant A. Sutton S. Bell D.	Spatially Correlated Analyses of Hydrogen Isotope Compositions and Iron Valence in Dish Hill Kaersutites: Implications for Martian Igneous Samples [#6473] We have investigated microscale variations in D/H ratios, water abundances and Fe valence in carefully characterized terrestrial igneous samples with the goal of understanding the variability in hydrogen isotope compositions and redox within and among the martian meteorites.
10:30 a.m.	Humayun M. * Yang S. Irving A. J. Righter K.	Sulfide Assimilation and Mineralization in Ancient (2.4 Ga) Shergottites [#6380] Extreme fractionation of Ni and Co, and enrichments of Zn, indicate the first evidence of ore mineralization of potentially economic scale on Mars.
10:45 a.m.	Ostwald A. M. * Udry A. Gross J.	Melt Inclusion Analyses to Constrain Parental Magma Compositions of the Nakhlite Meteorites [#6106] Melt inclusions in a suite of nakhlites (martian meteorites) are analyzed for major and minor element abundances using microanalytical techniques in order to reconstruct the nakhlite parental magma composition.
11:00 a.m.	Krämer Ruggiu L. * Gattacceca J. Devouard B. Udry A. Debaille V. Rochette P. Lorand J.-P. Bonal L. Beck P. Sautter V. Meier M. M. M. Gounelle M. Marrochi Y. Maden C. Busemann H.	Caleta el Cobre 022: An Unusual Nakhlite with Abundant Aqueous Alteration [#6379] We describe Caleta el Cobre 022, a new Nakhlite with unusal features.
11:15 a.m.	Cao F. * Flemming R. L. Moser D. E. Izawa M. R. M.	Mineralogy and Shock Effects in Martian Regolith Breccias [#6456] Four slabs and one powder sample were used for the micro-XRD, powder-XRD, Raman, and SEM-EDS experiments. SEM-EDS and micro-XRD experiments were done in Western University. Raman and powder-XRD were done in IPM, Okayama University.
11:30 a.m.	Liu Y. * Eckley S. A. Blumenfeld E. H.	Most Shergottites were Once Vesicular: Evidence from 3D Computed X-Ray Tomography [#6207] Shergottites with impact melt pockets were vesicular before impact, as shown by 3D textural relationship between fractures, residual vesicles and impact melt pockets in several shergottites.
11:45 a.m.	Righter M. * Lapen T. J. Irving A. J. Hoefnagels B.	Sm-Nd, Lu-Hf and U-Pb Systematics of Northwest Africa 11509 Shergottite. [#6477] The Lu-Hf systematics of NWA 11509 shows disturbed system. In-situ phosphates U-Pb dating results show very recent melting event likely due to ejection from Mars.
12:00 p.m.	Rahib R. R. Udry A. * Howarth G. H. Gross J. Combs L. M. Laczniak D. L. Day J. M. D.	Formation and Emplacement of Martian Poikilitic Shergottites [#6205] All martian poikilitic martian shergottites underwent similar emplacement processes, including various sills at different locations at the martian surface, and are likely linked to the other shergottites.
12:15 p.m.	Orr K. J. * Forman L. V. Benedix G. K.	Geochemical and Petrological Characterization of Four New Shergottites [#6220] Martian meteorites are extremely rare. Therefore the discovery of new meteorites represents a significant opportunity to expand our current understanding of Mars. Here we present geochemical and petrological data on four new shergottites.
12:30 p.m.	Bridges J. C. * Cousin A. Sautter V. Rapin W. Bowden D. Thompson L. Schwenzer S. P. Bedford C. Payre V. Gasnault O. Forni O. Pinet P. Wiens R. Yingst R. A.	Feldspathic Cumulate Samples and Plutonic Rocks in Gale Crater: Comparisons to Martian Meteorites [#6326] Feldspathic cumulates and basaltic plutonic rocks have been identified in Gale Crater, unique from any meteorites or MER samples. The feldspar cumulates show variable hydration and silicification, and contain a possible ferrohastingsite.
12:45 p.m.	Benedix G. K. Lagain A. L. Bland P. A. * Chai K. Meka S. Norman C. Towner M. C. Anderson S. Paxman J. Cary F. Fairweather J.	Towards a Surface Age Map of Mars at Ultimate Resolution, and the Search for Source Craters of the Martian Meteorites [#6355] Finding the source craters of the shergottite meteorites on Mars is like finding a needle in a haystack. We have an automated algorithm that will help and provide unprecedented resolution of the age of the martian surface.

Tuesday, July 9, 2019

CHONDRULES AND CHONDRITES I

9:00 a.m. Small Auditorium

Chairs: Leonardo Baeza and Martin Bizzarro

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
9:00 a.m.	Nakashima D. * Kimura M. Yamada K. Noguchi T. Ushikubo T. Kita N. T.	Oyxgen Isotope Systematics of Porphyritic Chondrules and Their Fragments in CH and CB Chondrites [#6043] Type I porphyritic chondrules and their fragments in CH and CB chondrites show a trend that the Δ^17O values increase with increasing Mg#, which is explained by an addition of ^16O-poor carbon-rich organics to the ^16O-rich precursors.
9:15 a.m.	Baeza L. * Ireland T. R. Ávila J. N. Mallmann G.	Oxygen Isotope Systematics of Ordinary Chondrite Chondrules and Their Main Chondrule Population [#6375] Chondrule populations have been suggested in terms of oxygen isotopes but never statistically assessed. We focus on the in situ O-isotope of chondrules from unequilibrated ordinary chondrites of the different iron groups (H, L, and LL).
9:30 a.m.	Nagashima K. * Libourel G. Schrader D. L. Krot A. N.	Abundant ^16O-Rich Olivines in Chondrules from Ordinary Chondrites: Implications to Outward Transport of Dust in the Protoplanetary Disk [#6218] O-isotope imaging of agglomeratic chondrules from UOCs revealed abundant relict ^16O-rich olivine. They are most likely related to AOAs, formed in an innermost region of the disk and subsequently transported outward by turbulent diffusion.
9:45 a.m.	Villeneuve J. * Marrocchi Y.	Origin and Evolution of the Oxygen Isotopic Composition of Chondrules [#6345] This study presents new EPMA and SIMS data allowing to reveal previously unrecognized internal structures within type I chondrules from NWA 5958 and Kaba and provides new hints on the origin and the evolution of the oxygen isotopic composition.
10:00 a.m.	Matsuda N. * Sakamoto N. Tachibana S. Yurimoto H.	Heating History of Igneous Rim Formation Deduced from Micro-Scale Migration of Oxygen Isotopes [#6084] We present two-dimensional chemical and oxygen isotopic distributions in an igneous rim of a chondrule within CV chondrite with sub-micrometer resolution in order to constrain the rim formation process.
10:15 a.m.	Shimizu K. * Alexander C. M. O’D. Hauri E. H. Sarafian A. R. Nittler L. R. Wang J. Jacobsen S. D. Mendybaev R. A.	Hydrogen Abundances and Isotope Compositions of Chondrules in Carbonaceous and Ordinary Chondrites [#6467] D-rich H isotopic composition of mesostases in ordinary chondrites compared to those in carbonaceous chondrites due to inheritance from D-rich ice or Fe oxidation by water.
10:30 a.m.	Bizzarro M. * Bollard J. Connelly J. N. Schiller M.	Evidence for Delayed Chondrule Formation in the Outer Solar System [#6068] We report on the U-corrected Pb-Pb ages of two chondrule populations understood to have formed in the inner and outer disk regions based on their ^54Cr/^52Cr compositions. We show a resolvable age difference of 1.4 ± 0.8 Myr between the two groups.
10:45 a.m.	Hiyagon H. * Fukuda K. Tanimura Y. Fujiya W. Sugiura N. Kagoshima T. Takahata N. Sano Y.	Excess Boron 10 Observed in Chondrules from Y82094 (C3.2) Chondrite [#6263] Be-B isotopic analyses were conducted for chondrules in Y82094 (ungrouped C3.2) chondrite. Clear excesses in ^10B were observed in the four chondrules so far analyzed.
11:00 a.m.	Barosch J. * Ebel D. S. Hezel D. C. Alpert S.	Formation of Chondrules and Matrix in Kakangari Chondrites [#6305] We present a comprehensive dataset, containing petrographic and chemical data to understand the origin and formation of chondrule textures, bulk chondrule compositions and chondrule-matrix complementarities in Kakangari chondrites.
11:15 a.m.	Bigolski J. N. * Weisberg M. K. Ebel D. S.	Plastic Deformation of Chondrules in Ordinary and Enstatite Chondrites: Evidence of Hot Accretion or Impact-Related Regolith Processing? [#6413] Plastic deformation of chondrules are evident in many primitive meteorites. We examine models of the formation of deformation textures in unequilibrated ordinary chondrites and Type 3 enstatite chondrites.
11:30 a.m.	Suttle M. D. * Folco L.	Pseudomorphic Chondrules in Hydrated Fine-Grained Micrometeorites — and the Identification of a New Hydrated Parent Body [#6256] Chondrules in fine-grained micrometeorites are aqueously altered, ~50% are entirely replaced (pseudomorphic). O-isotope data on a single micrometeorite reveals a new group not associated with known hydrated chondrites.
11:45 a.m.	Koch T. E. * Spahr D. Merges D. Beck A. A. Christ O. Fujita S. Genzel P.-T. Kerscher J. Lindner M. Mederos Leber D. Wilde F. Morgenroth W. Winkler B. Brenker F. E.	EXCISS, a Chondrule Formation Experiment Aboard the ISS — First Results [#6388] We present the first results of an chondrule formation experiment which was carried out aboard the International Space Station ISS.
12:00 p.m.	Arakawa S. * Nakamoto T.	Compound Chondrule Formation via High-Speed Collision of Supercooled Droplets in Optically Thin Shock Waves [#6113] Chondrule precursors can maintain their supercooling in optically thin shock waves. The collision frequency between crystallized chondrules and supercooled droplets is consistent with the fraction of compound chondrules in nonporphyritic chondrules.
12:15 p.m.	Bodénan J.-D. * Survillle C. Mayer L. Schönbächler M.	Shocks Produced by Jupiter in the Context of Chondrule Formation: Effects of Cooling and Dust Densities [#6272] This work follows up on previous results, in which a Jupiter-mass planet generated temperatures sufficient to melt chondrule precursors. Here, we further explore the role of dust and cooling in the disk and how they affect shock temperature.
12:30 p.m.	Sirono S. * Turrini D.	Chondrule Formation Through Collisions Between Planetesimals Containing Volatile Materials [#6081] We propose that collisions of low temperature planetesimals containing volatile material naturally explain the size and cooling rate of chondrules. Rapidly heated volatile material quickly expands and break up the silicate melt down to small sizes.
12:45 p.m.	Greenwood J. P. * Herbst W. Abe K.	A Radiative Heating Model for the Formation of Chondrites and the Last Melting Event of Chondrules [#6422] A new radiative heating model that relates chondrite formation to the last melting event that chondrules experienced.

Tuesday, July 9, 2019

PRESOLAR GRAINS AND THE ORIGINS OF ISOTOPIC ANOMALIES IN METEORITIC MATERIALS

9:00 a.m. Conference Room 1

Chairs: Jean-David Bodénan and Rhonda Stroud

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
9:00 a.m.	Fujimoto Y. * Krumholz M. R. Tachibana S.	Short-Lived Radioisotopes in Meteorites from Galactic-Scale Correlated Star Formation [#6034] Star formation is correlated on galactic scales, so that ejecta preferentially enrich atomic gas that will subsequently be accreted onto GMCs. New generations of stars preferentially form in patches of the Galaxy contaminated by previous generations.
9:15 a.m.	Dwarkadas V. V. * Dauphas N. Meyer B.	Accounting for SLRs in the Early Solar System with a Triggered Star Formation Model for the Solar System [#6108] Formation of the solar system by triggered star formation in the shell of a Wolf-Rayet bubble can account for the abundances of most short-lived radionuclides found in the early solar system.
9:30 a.m.	Heck P. R. * Greer J. Kööp L. Trappitsch R. Gyngard F. Busemann H. Maden C. Ávila J. N. Davis A. M. Wieler R.	Evidence for Presolar Grain SiC Aggregates from Cosmogenic Nuclides [#6112] We analyzed cosmogenic He and Ne in large presolar SiC from Murchison. By utilizing the large difference in nuclear recoil loss of cosmogenic ^3He and ^21Ne we conclude that some grains were likely part of large aggregates in the interstellar medium.
9:45 a.m.	Stephan T. * Davis A. M.	Molybdenum in Presolar Silicon Carbide Grains Reveal Details of s-, r-, and p-Process Nucleosynthesis [#6107] A constant ratio between p- and r-process molybdenum has been observed in presolar SiC grains, primitive meteorites, and the solar system. It shows that r- and p-processes must be strongly correlated over time and perhaps space in the Galaxy.
10:00 a.m.	Amari S. * Pignatari M.	Sodium-22 Production in Supernovae [#6325] Many presolar graphite grains from supernovae contain ^22Ne from the decay of 22Na. Recent model calculations indicate that 22Na may be produced in the outer zone during explosive H burning.
10:15 a.m.	Takigawa A. * Kim T.-H. Igami Y. Umemoto T. Tsuchiyama A. Koike C. Matsuno J. Watanabe T.	Formation of Metastable Alumina Dust around AGB Stars: Condensation Experiments Using Induction Thermal Plasma Systems [#6341] We performed condensation experiments of Al-Si-Mg-O gases using ITP systems. Comparison between MIR spectra of condensates and circumstellar dust emission indicates that metastable Al2O3 containing ~10% of Si is commonly present around AGB stars.
10:30 a.m.	Verdier-Paoletti M. J. * Nittler L. R. Wang J.	High-Resolution Measurements of Mg, Si, Fe and Ni Isotopes of O-Rich Presolar Grains [#6433] Mg-Si isotopes measurements in presolar silicates and oxides of Group 1 yield compositions that cannot be solely explained by GCE but could rather suggest a contribution to the meteoritic stardust budget by super-AGB stars.
10:45 a.m.	Leitner J. * Hoppe P. Kodolányi J.	Presolar Grains from Higher-Mass AGB Stars? [#6356] We report the identification of several presolar silicate grains with Mg-isotopic signatures indicative of hot bottom burning, indicative of an origin in higher-mass AGB stars.
11:00 a.m.	Nittler L. R. *	Isotopic Imprints of Super-AGB Stars and their Supernovae in the Solar System [#6424] Eight to ten solar mass stars / Make interesting stuff / Seen in the solar system?
11:15 a.m.	Meyer B. S. *	Models of the Chemical Evolution of Calcium, Titanium, and Chromium Isotopes and Their Premolar Carriers [#6417] I present models of the Galactic chemical evolution of the isotopes of calcium, titanium, and chromium and their possible carriers into the early solar system. The results can help our understanding of isotopic anomalies in primitive meteorites.
11:30 a.m.	Ek M. Hunt A. C. Lugaro M. Schönbächler M. *	The Origin of the Missing Nucleosynthetic Isotope Variations in Heavy Refractory Elements [#6252] We propose that the s-process bulk rock heterogeneity is the result of the initial metallicity of the AGB stars that contributed most presolar grains to the solar system. This can explain the missing nucleosynthetic anomalies in heavier elements.
11:45 a.m.	Sakuma K. * Hidaka H. Yoneda S.	Ba Isotopic Heterogeneity in CM Chondrites [#6232] In this study, isotopic analysis of Ba and quantitative analyses of Rb, Sr, Cs, Ba and REE abundances from the acid leachates of CM2 chondrites were performed to discuss the origin of Ba isotopic variations.
12:00 p.m.	Meshik A. * Schovsbo N. H. Pravdivtseva O.	Xenon Isotopes in Scandinavian Alum Shales: A Clue for the Origin of P1(Q) and P3 Xenon Components in Nanodiamond-Rich residues from Primitive Meteorites [#6332] Low-temperature xenon components in nanodiamond residues from primitive meteorites are likely of “local” than “presolar” origin.
12:15 p.m.	Stroud R. M. *	Structural and Elemental Transformation of Meteoritic Nanodiamonds During In Situ Heating in a UHV Scanning Transmission Electron Microscope [#6457] In situ heating stage studies of “presolar” nanodiamond residues in a UHV STEM provide context for the interpretation of stepped combustion and pyrolysis experiments, for determination of nanodiamond origins.
12:30 p.m.	Hibiya Y. * Iizuka T. Enomoto H.	The Initial Abundance of Niobium-92 in the Outer Solar System [#6370] We’ve found that the initial abundance of ^92Nb in the outer solar system was distinctly higher than the value in the inner solar system. We discuss the implications of the finding for the early solar system chronology and its nucleosynthetic origin.
12:45 p.m.	Huss G. R. *	Interpreting the Isotopic Dichotomy Among Solar System Materials [#6200] The isotopic dichotomy among chondritic materials is often explained in terms of accretion inside and outside of Jupiter’s orbit. This presentation will argue that nebular processes operating in the asteroid belt can explain the observations.

Tuesday, July 9, 2019

CHONDRULES AND CHONDRITES II

2:30 p.m. Auditorium

Chairs: Wei Du and Dominik Hezel

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
2:30 p.m.	Luu T.-H. * Hin R. C. Coath C. D. Elliott T.	Bulk Chondrite Variability in Mass-Independent Magnesium Isotope Composition — Implications for Initial Solar System ^26Al/^27Al [#6131] Bulk ordinary and carbonaceous chondrites (except CRs) define an array on an Al-Mg isochron diagram, whose (^26Al/^27Al)0 slope is within uncertainty of the canonical value defined by bulk CAIs.
2:45 p.m.	Vacher L. G. * Ogliore R. C. Liu N. Lewis J. B.	NanoSIMS O and S-Isotope Analyses of Cosmic Symplectite in the Primitive Chondrite Acfer 094 [#6468] Cosmic symplectite (COS) are anomalous ^17,18O-rich phases that carry O-isotopic mass-independent fractionation (MIF).However, no S-analyses were previously reported for COS while they might also display, like for O isotopes, MIF for S isotopes.
3:00 p.m.	Hezel D. C. * Harak M.	Using the ChondriteDB Database to Study Chondrule — Matrix Complementarities [#6316] Chondrule-matrix complementarity can decide whether these two components formed from a single reservoir or were mixed from various reservoirs. Complementarities of Mg/Si vary among CV chondrites. This supports a formation from a single reservoir.
3:15 p.m.	Le Guillou C. * Zanetta P-M. Leroux H. Brearley A. J. Zanda B. Hewins R.	Amorphous Silicates in Carbonaceous and Ordinary Chondrites [#6267] Amorphous silicate is a major component of matrix in pristine carbonaceous and ordinary chondrites. Systematic TEM hyperspectral data analysis allows to discuss its origin and secondary parent body evolution.
3:30 p.m.	Florin G. * Luais B. Rushmer T. Alard O.	Bencubbinite Formation: The Turbulent Life of Metal as Inferred from Germanium Isotopes [#6313] The formation of CB chondrites has been described as being related to impact plume condensation. In this study, we propose isotopic investigation of Ge in CB bulk metal and metal grains in order to identify condensation processes at low temperature.
3:45 p.m.	Reger P. M. * Simon S. B. Gannoun A. M. Gibson J. M. Gannoun R. C. Bouvier A.	Petrology, Geochemistry and Pb-Pb Age of a Large Igneous Inclusion from the Ordinary Chondrite Paposo 004 [#6365] We report the petrology, geochemistry, O isotopic composition and Pb-Pb whole-rock age of a large igneous inclusion found in the L3.1 ordinary chondrite Paposo 004 and conclude that it formed as a product of impact melting.
4:00 p.m.	Alpert S. P. * Ebel D. S. Weisberg M. K. Kita N. T. Siron G. Fukuda K.	The Petrology of Opaque Assemblages in Unequilibrated Ordinary Chondrites [#6103] A detailed petrologic study of the opaque assemblages in Semarkona including oxygen isotope data. OAs exhibit a wide range of mineralogy and structure which may indicate formation from multiple sources.
4:15 p.m.	Kita N. T. * Siron G. Kimura M.	Petrographic Examination of Unequilibrated Ordinary Chondrites with Low Petrologic Subtypes [#6237] To search pristine chondrules suitable for Al-Mg chronology, we examined metal phases and petrology of chondrules in six North West Africa and Antarctic ≤3.05 UOCs. They are only slightly more metamorphosed (3.05–3.10) than Semarkona (LL3.01).
4:30 p.m.	Park J. * Weisberg M. K. Nagao K. Herzog G. F. Nyquist L. E. Ebel D. S. Okazaki R. Choi J. Baek J. M. Park C. Lee M. J. Lee J. I.	Noble Gas Studies on Northwest Africa (NWA) 8785 EL3 and NWA 8789 EH3 Chondrites [#6259] We present noble gas analyses of the recent finds Northwest Africa (NWA) 8785 (EL3) and 8789 (EH3).
4:45 p.m.	Debaille V. * Armytage R. M. G. Wainwright A. N. Pourkhorsandi H. Hublet G.	Comparing Neodymium Nucleosynthetic Anomalies in Ordinary and Enstatite Chondrites [#6132] We will investigate the nucleosynthetic anomalies of Nd to understand the average composition of the Earth.
5:00 p.m.	Du W. * Ohfuji H. Irifune T.	Melting of Sahara 97072 Meteorite at High Pressure and High Temperatures [#6185] Melting experiments on the Sahara 97072 (EH3) meteorite at 5 GPa and 1000–1700°C show that: (1) the meteorite is completely melted at 1600°C;(2) Overheating the meteorite sample to 1650 and 1700°C causes (Fe, Ni)-alloy exsolved from (Fe, Ni)-sulfide.
5:15 p.m.	Irving A. J. * Kuehner S. M. Carpenter P. K. Ziegler K. Sipiera P. P.	Deep Thermal Metamorphism (Not Melting) of Ordinary and Carbonaceous Chondrite Precursors Produced Type 7 and Proposed Type 8 Chondrites [#6399] We propose expanded terminology for high grade thermally metamorphosed ordinary and carbonaceous chondrites.

Tuesday, July 9, 2019

METEORITE EXPOSURE HISTORIES, DELIVERY, AND RECOVERY

2:30 p.m. Small Auditorium

Chairs: Mutsumi Komatsu and Natasha Stephen

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
2:30 p.m.	Hidaka H. * Nishiizumi K. Caffee M. Yoneda S.	Samarium Isotopic Compositions of Lunar Meteorites [#6279] Cosmic-ray exposure records for seven lunar meteorites were characterized from the systematic data set given by cosmogenic nu-clides and neutron-captured isotopic shifts of ^149Sm-^150Sm.
2:45 p.m.	Choi J. * Nagao K. Park J. Baek J. M. Lee J. I. Ebel D. S. Weisberg M. K.	In-Situ Noble Gas Analysis of Mount DeWitt 12007 Lunar Meteorite [#6281] We report the results of noble gas analyses of DEW 12007 lunar meteorite by a laser heating method.
3:00 p.m.	Ranjith P. M. * He H. Smith T. M. Su F. Lin Y. Zhu R.	Noble Gas Components in the Lunar Meteorite Northwest Africa 10203 [#6175] We will present noble gas data from a Lunar meteorite NWA 10203, which is a regolith breccia. Trapped gases release at high-T steps where as cosmogenic gases at low-T steps. We have estimated trapped solar-Ne composition and cosmic ray exposure age.
3:15 p.m.	Miura Y. * Kato T.	Quenched Indicator of Carbon-Bearing Solids Found in the Nio Meteorite [#6240] Quenched formations of carbon-bearing solids are discussed on any FeC-bearing fusion crust and MgC-bearing chondrules of the Nio meteorit shower. Quenched indicator of carbon-bearing grains can be applied to meteorite collisions and its shower.
3:30 p.m.	Fries M. * Waddell J. OET and crew of E/V Nautilus SOI and crew of R/V Falkor Pugel B. Zeigler R. Harvey R. Welzenbach L. McCubbin F. Abell P.	Recovering the 07 Mar 2019 Meteorite Fall into the Olympic Coast National Marine Sanctuary [#6483] Weather radar data indicates that this meteorite fall is unusually mechanically tough. Recovery of at least one meteorite is needed to find out why. Recovery efforts by the research vessels E/V Nautilus (OET) and R/V Falkor (SOI) are described.
3:45 p.m.	Caplan C. E. * Huss G. R. Nagashima K. Schmitz B.	Meteorites of the Jurassic: Populations Determined from Remnant Extraterrestrial Chrome-Spinels in Spanish Limestone [#6050] Jurassic meteorite populations are investigated using O-isotopes and element abundances of chrome-spinels from highly condensed sediments.
4:00 p.m.	Sliz M. U. * Braucher R. Espic C. Gattacceca J. Hofmann B. A. Leya I. Szidat S. ASTER Team	Terrestrial Ages of the Shisr 015 Meteorite Strewn Field from the Sultanate of Oman, Determined Using Measured In Situ C-14 and Be-10 [#6287] We present C-14/Be-10 terrestrial ages of the meteorite strewn field Shisr 015 from the Sultanate of Oman, determined with C-14 data obtained at radiocarbon extraction line at the Univ. of Bern, and Be-10 obtained at the ASTER AMS facility (France).
4:15 p.m.	Mikouchi T. * Yamaguchi A. Shirai N. Isa J. Komatsu M. Kawakami S. Katsuta N. Kawamata T. Sugiyama K.	Nagara: A New Japanese IAB Iron Meteorite Find [#6141] Nagara is the newest Japanese iron (approved in 2018). 2 samples have been recovered (6.5 and 9.7 kg) and their geochemistry shows Nagara is IAB-MG. Nagara is composed of ~1 cm granular kamacite with rare silicates and similar to Campo del Cielo.
4:30 p.m.	Chennaoui Aoudjehane H. * Agee C. B.	Ksar El Goraane (H5): The Latest Moroccan Meteorite Fall on 2018 [#6297] On Octobre 28th around 22:30 (GMT+1) a fireball was detected by many people in the east of Morocco around 80 northeast of Erfoud. The fall site is around the small Ksar El Goraane village. First pieces was collected one day after. It’s an H5 OC.
4:45 p.m.	Di Gregorio M. Busemann H. * Hunt A. C. Krietsch D. Schönbächler M. Maden C.	Variable Cosmogenic Argon in L/LL5 Chondrite Knyahinya [#6384] Large variations in cosmogenic ^38Ar that correlate with Ca concentrations in 20 mg aliquots of L/LL5 Knyahinya suggest that in this mass range ^38Ar exposure ages can be off by almost a factor of 2, if Ar and Ca are measured in different aliquots.
5:00 p.m.	Smith T. M. * Li S. Ranjith P. M. Su F. Gattacceca J. ASTER Team He H.	Cosmic-Ray Exposure Age and Preatmospheric Size of three Recent Falls (L6) [#6155] We report here the cosmic-ray exposure ages and preatmospheric sizes of three recent L6 chondrites falls. We expect these meteorites to have a similar exposure history and therefore to be paired.

Tuesday, July 9, 2019

DIFFERENTIATED METEORITES II: FROM PRIMITIVE ACHONDRITES TO IRONS

2:30 p.m. Conference Room 1

Chairs: Steven J. Desch and Chi Ma

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
2:30 p.m.	Aléon J. * Aléon-Toppani A. Platevoet B. Bardintzeff J. M. McKeegan K. D. Brisset F.	Onset of Magmatism on a Carbonaceous Chondrite Planetesimal [#6047] The petrology and isotopic composition of trachybasaltic clast UH154-11 from the CR chondrite El Djouf 001 are consistent with partial melting and melt extraction in the CV chondrite planetesimal.
2:45 p.m.	Hu S. * Anand M. Franchi I. A. Zhao X. Chan Q. H. S. Zhang B. Bouvier A. Lin Y. T. Zhang J. C. Hao J. L. Yang W. Liu Y. Tang G. Q. Li Q. L. Agee C.	U-Pb Dating, Hydrogen and Chlorine Isotopic Systematics of the Whitlockite and Apatite from the Ungrouped Achondrite Northwest Africa 11119 [#6099] U-Pb dating, hydrogen and chlorine isotopes, and volatile concentration of the first natural whitlockite from ungrouped achondrite NWA 11119 were measured to constrain the nature of the most evolved volcanism in the early solar system.
3:00 p.m.	Yasutake M. * Yamaguchi A. Greenwood R. C. Hibiya Y. Iizuka T. Franchi I. A.	Olivine Chemical Features and O-Cr-Ti Isotopic Compositions of Northwest Africa 7312 Unique Differentiated Meteorite: Comparing to Other Meteorite Groups [#6090] We investigated olivine minor elements composition and O-Cr-Ti isotope compositions of NWA 7312. We conclude that NWA 7312 is derived from an unknown differentiated asteroid that experienced extensive melting and ductile solid-state deformation.
3:15 p.m.	Vaci Z. * Agee C. B. Ziegler K.	Dunite Breccias Northwest Africa 12217, 12562: Possible Planetesimal Mantles [#6459] Northwest Africa 12217 and 12562 are petrologically and geochemically distinct dunite breccias that are likely sourced from a unique parent body. They might represent a cumulate pile originating from the mantle of a differentiated planetesimal.
3:30 p.m.	Desch S. J. * O’Rourke J. G. Schaefer L. K. Sharp T. G. Schrader D. L.	Ureilites: Mixes of a Vesta-Like Parent Body and an Impactor from Proto-Mars [#6203] We hypothesize that ureilite silicates, metal and carbon represent mixes of two end-members: a Vesta-like parent body that underwent smelting; and an impactor derived from proto-Mars’s mantle.
3:45 p.m.	Zhu K. * Moynier F. Schiller M. Wielandt D. Larsen K. K. van Kooten E. M. M. E. Bizzarro M.	Chromium Isotopic Constraints on the Origin the Ureilite Parent Body [#6323] Ureilite parent body shows a mantle heterogeneity of Cr isotopes, and the monomict ureilites were melted at 4567.1 ± 1.0 Ma dated by Mn-Cr dating. The correlated ε^53Cr and ε^54Cr suggest this old age reflects the formation of ureilite planetesimals.
4:00 p.m.	Wilbur Z. E. * Udry A. McCubbin F. M. Vander Kaaden K. E. Zeigler R. A. Ziegler K. DeFelice C.	Investigating the History of Aubrites Using X-Ray Computed Tomography and Bulk Partition Coefficients [#6180] We scan a partial suite of aubrites using XCT to provide a 3D view of aubritic mineralogies, and calculate aubrite bulk distribution coefficients, which we compare to petrologic experiments run under mercurian conditions.
4:15 p.m.	Ray S. * Wadhwa M. Rai V. K. Garvie L. A. J.	Iron Isotope Compositions of Si-Bearing Metal Nodules from the Mount Egerton Aubrite [#6427] This work discusses the origin of metal nodules in the Mount Egerton aubrite based on their elemental and iron isotope composition. Our data suggest partial equilibration of metal in aubrites under existing oxygen fugacity conditions.
4:30 p.m.	Khan H. * Leya I.	A Re-Investigation of 41K-K Cosmic Ray Exposure Ages for Iron Meteorites [#6293] Opening up the investigation into Potassium Dating of Iron Meteorites from a very different a unique angle.
4:45 p.m.	Ma C. * Rubin A.	Edscottite, Fe5C2, a New Iron Carbide Mineral from the Wedderburn Iron Meteorite [#6395] Edscottite is Hägg-carbide, Χ-Fe5C2, a new iron carbide mineral, joining cohenite (Fe3C) and haxonite ((Fe,Ni)23C6), formed metastably in kamacite in Wedderburn during cooling from high temperature.
5:00 p.m.	Chabot N. L. *	Revised Trapped Melt Model for Iron Meteorites [#6025] A revised trapped melt model matches the IIIAB iron meteorite elemental trends while also using experimentally determined partitioning values. Everyone is happy!
5:15 p.m.	Litasov K. D. * Teplyakova S. N. Shatskiy A. Kuper K. E.	Fe-Ni-P-S Melt Pockets in Elga IIE Iron Meteorite: Evidence for the Origin at High Pressures up to 20 Gpa [#6053] We report new evidence for high-pressure microstructures in Elga IIE iron meteorite, made of Fe-Ni-P-S melt microcrystalline aggregates. Their compositions correspond to the Fe3P-Fe3S solid solution with the closure of an immiscibility gap at 20 GPa.

Tuesday, July 9, 2019

POSTER SESSION: CHONDRULES!

5:30 p.m. Poster Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Sukhanova K. G. Skublov S. G. Galankina O. L. Obolonskaya E. V. Kotova E. L.	Geochemical and Mineralogical Features of Chondrule and Matrix Olivine from the Buschhof Ordinary Chondrite [#6165] In this research we are measured major and trace elements contents in olivine for understanding formation differences between chondrule and matrix in ordinary chondrites.
Bakhtin A. I. Sungatullin R. Kh. Gusev A. V. Eskin A. A. Kuzina D. M.	Superimposed Processes in Chondrules of the Ochansk Meteorite [#6199] We present investigations of Ochansk meteorite by set of methods for study formation history of meteorite.
Abe K. Greenwood J. P. Herbst W.	Textures and Chemical Compositions of Experimental Chondrule Synthesis by a Radiative Heating Model [#6476] We performed experimental chondrule synthesis by a radiative heating model to compare synthesized chondrules and natural Type I chondrules. The synthesized chondrules have affinity with Semarkona Type I chondrules in texture and chemical composition.
Varela M. E.	Silica-Rich Objects in Acfer 182: A New View [#6170] I report the results of major and trace element studies of some silica-rich objects (SRO) in Acfer 182 and compared them with previous studies of SRO, Mg-rich cryptocrystalline (CC) and radiating pyroxene (RP) chondrules in CH chondrites.
Goudy S. P. Ruzicka A. M.	Relations Between Accretional Deformation and Temperature in Cluster Chondrite Chondrules [#6105] We analyze cluster chondrite chondrules with EBSD methods to test for correlations between metrics of chondrule deformation, olivine deformation, and deformational temperature. It is found that chondrule and olivine deformation are strongly related.

Tuesday, July 9, 2019

POSTER SESSION: DIFFERENTIATED METEORITES I: MOSTLY HEDS

5:30 p.m. Poster Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Mayne R. G. Funderburg R. L. Lunning N. G.	Reevaluating the Unbrecciated Eucrites for Evidence of Metasomatism [#6196] Old eucrite data: / See metasomatism / Not discussed before.
Anderkin C.	Silica Rich Vestan Crustal Terranes? Intermediate Compositions Revealed by an Inhomogeneous Impact Spherule in Northwest Africa 12231 [#6156] Are the enrichments of silica and alkalis here indicative of felsic Vestan crust, impact-induced oxide fractionation, or something else? Let’s find out.
Roszjar J.	Secondary Alteration of the Serra Pelada Eucrite [#6311] This study focuses on the petrology of accessorry phases in the Serra Pelada eucrite fall to characterize alteration processes.
Liao S. Y. Hsu W. B.	U-Pb Zircon and Apatite Chronology of a Quartz-Rich Basaltic Eucrite and Constraint on Thermal History of the Vestan Crust [#6234] In this work, we carried out in-situ U-Pb isotopic study on the basis of detailed petrographic studies of NWA 6594, an unbrecciated basaltic eucrite, with the purpose to obtain precise chronological constraints with a petrological context.
Slotte N. Debaille V. Wainwright A. N. Goderis S. Luguet A.	Early Core Formation of the Asteroid Vesta Revealed by HSE Concentrations in Eucrites [#6151] We analyzed five unbrecciated eucrites for their HSE systematics. We suggest that the discrepancies in HSE depletion reflect the progressive decrease of core segregation intensity in favor of a dominant intake of HSE by chondritic accretion.
Chen H. Y. Pro. Miao B. K. Xie L. F.	Petrogensis of HED Meteorites and Implications for Magmatic Evolution of Parent Body [#6058] Based on the structure and texture of rocks, major and trace elements geochemical characteristics, some significant achievements regarding to the HED clan of meteorites petrogenesis, implication of magmatic evolution and thermal metamorphism.
Szurgot M. Wach R. A. Unsalan O. Altunayar-Unsalan C.	Mean Atomic Weight and Thermophysical Properties of Sariçiçek Howardite [#6011] Mean atomic weight of Sariçiçek meteorite was determined and compared with other HED achondrites and Vesta. Classification of Sariçiçek as an eucrite-rich howardite was confirmed, and specific heat, thermal conductivity and diffusivity predicted.
Ushikubo T. Shimizu K.	Development for In-Situ Volatile Element Abundances, and Hydrogen and Sulfur 2-Isotope Analyses of Silicate Glasses by SIMS [#6092] In-situ SIMS analysis techniques have capability to measure volatile element abundances, and hydrogen and sulfur isotope ratios of melt inclusions as small as 30 micrometer in size.

Tuesday, July 9, 2019

POSTER SESSION: DIFFERENTIATED METEORITES II: FROM PRIMITIVE ACHONDRITES TO IRONS

5:30 p.m. Poster Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Hidaka Y. Haba M. K. Shirai N. Yamaguchi A. Debaille V.	In-Situ Chemical Analyses of Winonaite Metals: Implications for the Origin of IAB Non-Magmatic Iron Meteorites [#6128] Genetic relationships between winonaites and IAB irons, and the origins of IAB iron subgroups are revealed by model calculation of metallic partial melting.
Pastukhovich A. Iu. Berzin S. V. Dugushkina K. A. Grokhovsky V. I. Chervyakovskaya M. V.	New Unique Branchinite-Like Achondrite Calama 029 [#6148] The abstract describes the result of a study of the Calama 029 meteorite, a unique achondrite that has no analogues among known meteorites. Assumptions about the mechanisms of formation and the parent body of the Calama 029 meteorite are made.
Miura Y. N. Okazaki R.	Noble Gases in a Primitive Achondrite Northwest Africa 3250 [#6344] NWA 3250 is a primitive achondrite. The oxygen isotope composition plots on the bulk CR chondrite field and is close to those of some primitive achondrites. In this study, we conducted noble gas analyses for two small fragments of the meteorite.
Bischoff A. Lentfort S. Moehlmann K. Klemm K. Haberer S.	Mineralogical Characteristics of 20 New Samples from the Almahata Sitta Strewnfield [#6030] After asteroid 2008 TC3 impacted Earth in 2008, many different meteorite types were identified among the numerous meteorite fragments. Here, the mineralogical characteristics of 20 new samples (15 ureilites and 5 enstatite chondrites) are presented.
Broadley M. W. Bekaert D. V. Marty B. Yamaguchi A. Barrat J. A.	Noble Gas Variations in Ureilites Demonstrate Heterogenous Volatile Distribution in the Early Solar System [#6469] Ureilites represent the remnants of the mantle from a single, inner solar system body. The analysis of noble gases in ureilites therefore represents a unique opportunity to probe how planetary bodies acquire volatiles during accretion .
Goodrich C. A. Desch S. J.	Exogenous Metal in Ureilites [#6094] Metal in ureilites is a mixture of an indigenous, highly-fractionated residue from high degrees of melting in Fe-FeS, plus exogenous chondritic metal added from the impactor during catastrophic disruption of the ureilite parent body.
Sugiura N. Arai T. Matsui T.	Northwest Africa 4747, an Unique Mesosiderite [#6083] Petrographic features of the NWA 4747 mesosiderite are described and its history is discussed.
Wang Y. Mei A. Hsu W.	Petrology and Mineralogy of the Northwest Africa 11005 Mesosiderite [#6377] Preliminary results of petrologic and mineralogical studies of the NWA 11005 mesosiderite are presented.
Wang Y. Hsu W.	Petrology and In Situ Geochronology of the Youxi Mesosiderite [#6181] We carried out petrologic, mineralogic, and geochronological studies of the Youxi mesosiderite. The Pb/Pb age obtained for merrillites is 3950 ± 80 Ma, which represents the time of metal-silicate mixing that had produced the Youxi mesosiderite.
Koyama Y. Sano Y. Takahata N. Koike M. Haba M. K.	Hf-W and U-Pb Dating and REE and Ti Anaylysis of Zircons Extracted from Mesosiderites [#6302] In this study, we conducted U-Pb and Hf-W dating and measured REE and Ti concentration in zircons from the same mesosierites in order to discuss origin and evolution of these zircons by using NanoSIMS 50 at AORI,the University of Tokyo.
Grokhovsky V. I. Gladkovsky S. V.	Brittle Fracture Resistance of Chinga and Seymchan Meteorites Under Static and Impact Loading [#6429] A comparative evaluation of Chinga and Seymchan iron meteorites brittle fracture resistance by means of static fracture toughness and impact strength tests is presented.
Brusnitsyna E. V. Muftakhetdinova R. F. Yakovlev G. A. Grokhovsky V. I.	The Octahedrite and Pallasite Part Metallographic Comparison of the Seymchan Meteorite [#6481] In this work, various metallographic parameters of fragments from the octahedrite and pallasite parts of the Seymchan Meteorite were investigated.
DellaGiustina D. N. Domanik K. Hill D. H. Habib N. Lauretta D. S.	Olivine Inclusions in the Fukang Pallasite and Implications for the Main-Group Parent Body [#6398] We report on a variety of silicate inclusions enclosed in olivine in the main-group pallasite Fukang. These inclusions contain phases rarely or not previously reported in Main-group pallasites and have implications for the formation of Fukang.
Begunova A. S. Kamalov R. V. Yakovlev G. A. Grokhovsky V. I.	Influence of Meteorite Structure on Nanotubes and Nanocrystals Synthesis [#6406] This work is devoted to the synthesis of organized nanostructures using chemical vapor deposition on meteoritic substrate. The meteorite structural composition influence on morphology of nanostructures was discussed.
Litasov K. D. Sano Y. Takahata N. Miki T. Teplyakova S. N. Skripnik A. Y.	U-Pb and Pb-Pb Dating of the Apatite from IAB Iron Meteorites [#6125] We provide additional evidence for early formation of silicate-bearing IAB irons based on U-Pb dating of apatite from silicate-bearing inclusions. The obtained data for all meteorites quite densely fall on the isochronous age 4563 ± 29 Ma.
Li S.-L. Hsu W.-B.	Mineralogy and In Situ Pb–Pb Dating of Silicate Inclusions in Miles (IIE) [#6265] The Miles IIE iron contains several U-bearing phases with different occurrences. In-situ Pb–Pb dating of these phases were performed in this study for better understanding of the complex thermal history experienced by the IIE parent body.
Wang G. Q. Lin Y. T.	Huoyanshan Iron Meteorite: Bulk Chamical Composition and Classification [#6009] The first piece of iron meteorite Huoyanshan was found on Oct. 6, 2016 at 15 km NE of the Mountain Huoyanshan. It is an typical IAB-sLH iron, and it is significant to provid more information on research of IAB-sLH.
Sharygin V. V.	Sodium-Rich Phosphate and Silicate Inclusions in Troilite Nodule in Darinskoe Iron Meteorite (IIC) [#6301] Phosphate and silicate inclusions was found in troilite nodule of the Darinskoe iron meteorite. Decription and chemical composition of individual phases (buchvaldite, Cl-free djerfisherite, unusual Na-Ti-rich silicate glass) of inclusions are given.
Badekha K. A. Grokhovsky V. I. dr. Yakovlev G. A.	The Influence of Inclusions on the Formation of Metal Structure in the Ataxites [#6403] Seven iron meteorites were studied to reveal microstructural features near the inclusions. Spesial structure is formed in Hoba and Gebel Kamil ataxites. Small inclusions of schreibersite were revealed by EBSD and EDS methods.
Faivovich G. Goldberg N.	Campo del Cielo: Identification of a Fragment from the Long Lost Meson de Fierro at Naturhistorisches Museum Wien [#6397] A 19-gram fragment of the long lost Mesón de Fierro meteorite, from Campo del Cielo, has possibly been identified at the Natural History Museum Vienna.

Tuesday, July 9, 2019

POSTER SESSION: DYNAMICAL EVOLUTION AND PROCESSES IN THE SOLAR NEBULA

5:30 p.m. Poster Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Kobayashi K. Yamamoto D. Tachibana S.	Structure and Crystallization of Amorphous Enstatite Synthesized by Induced Thermal Plasma and Sol-Gel Method [#6236] Structure analysis and crystallization experiments of amorphous enstatite synthesized by different methods show that silicate network structure would affect the crystallization behavior of amorphous silicate dust in protoplanetary disks.
Ipatov S. I.	Accumulation of Planetesimals by Forming Terrestrial Planets from Different Regions of Their Feeding Zone [#6147] Migration of planetesimals to forming terrestrial planets is considered. The outer layers of the Earth and Venus could accumulate the same material for these two planets from different parts of the feeding zone of the terrestrial planets.
Ipatov S. I.	Probabilities of Collisions with the Earth and the Moon of Planetesimals Migrated from Outside the Orbit of Mars [#6290] We studied the probabilities of collisions with the Earth and the Moon of planetesimals migrated from initial distances from 2.5 to 40 AU from the Sun.
Perov N. I. Pakhomycheva V. E.	On the Problem of Galactic Dust Discovering [#6003] Decreasing of the velocities of the small sizes interstellar meteoroids in the internal part of the solar system is under consideration. Gravitational force of the Sun, light pressure and the effect of Pointing-Robertson are taken into account.
Kochemasov G. G.	Centimeter Size Crossing Ripples both on the Near and Far Sides of the Moon (Chang’E 3 and 4): Modulation of the Moon’s Orbit by the Galactic Rotation [#6036] Any celestial body moves in several orbits in Cosmos. These orbits must interact. The lower freqoencies modulate the higher ones producing side frequencies. They correspond structures. On the Moon due to Chang’E 3 and 4 one observes very fine rippling.

Tuesday, July 9, 2019

POSTER SESSION: IMPACTS HERE, THERE, AND EVERYWHERE

5:30 p.m. Poster Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Ucar H. Kletetschka G.	Relationship Between the Matuyama-Brunhes Reversal and Indochinites [#6008] Several studies showed that Australasian tektite fall could change magneto-hydrodynamic motions of the Earth’s core. In this study, the relationship between Matuyama-Brunhes magnetic reversal and indochinites is discussed.
Kassab F. Ferrière L. Belhai D.	Tin Bider Impact Structure (Algeria): Shock Metamorphism in Albian Sandstones. [#6017] Tin Bider impact structure is the largest complex impact crater known in Algeria characterized by a central uplift where sandstones are exposed. We report here on petrographic investigations shock metamorphic features in quartz grains such as PDF.
Hamai L. Lamali A. Yelles-Chaouche A. Abtout A. Nadjemi A. Merabet N. Bentridi S. Djadia L.	The Use of Georadar to Explore the Impact Ejecta Layer Around the Maâdna Structure (Talemzane, Algeria) [#6020] Georadar to Explore the Impact Ejecta Layer around the Maâdna Structure (Talemzane, Algeria).
Lamali A. Hamai L. Mokhtar S. A. Yelles-Chaouche A. Abtout A. Merabet N. Bentridi S. Djadia L. Nadjemi A.	A Contribution of Gamma Ray Spectrometric Data in Understanding the Structure of the Maâdna Crater (Talemzane, Algeria) [#6019] Gamma Ray Spectrometric Data in Understanding the Structure of the Maâdna Crater (Talemzane, Algeria).
Yin F. Chen M. Sharp T.	A TEM Investigation of Formation Process of Coesite from the Xiuyan Impact Crater [#6066] We study the crystallization process of two occurrences of coesite that embedded in the silica glass from the Xiuyan impact crater, China.
Plan A. Lindgren P. Lambert P.	A Survey of Zircon Microtextures in the Rochechouart Impactites [#6140] An ongoing project of Zircon microtextures in the Rochechouart impactites. Including SEM-BSE and at a later stage SEM-EBSD studies on zircon separates and zircons in thinsections.
Muravyev L. A.	Global Datasets of the Geophysical Fields as an Instrument for Impact Structures Discovery [#6462] The remote sensing of the Earth is one of the most perspective methods for detecting new impact structures. We analyzed how the 20 largest confirmed impact structures reflects in modern global databases of magnetic, gravitational fields and relief.
Mardon A. A. Zhou G.	Asteroid Impact ALert System [#6498] The Asteroid Terrestrial-Impact Last Alert System (ATLAS) is a NASA-funded robotic survey and acts as an early warning system for asteroid impacts to Earth.
Strait M. M. Flynn G. J. Durda D. D. Molesky M. J. May B. A. Congram S. N. Loftus C. L. Reagan J. R.	Appearance of the Impact Flash in Meteorite Disruption Experiments [#6455] An evaluation of the impact flash character during disruption experiments with meteorites and terrestrial analogs.
Leong P. K. Tang C. P. Tam S. I. Sekine T.	A DFT Study of the Structure and Properties of Nitrogen Doping Spinel MgAl2O3.5N0.5 [#6299] We use DFT calculation to study a possible nitrogen-doped spinel, including its structure and electronic properties. we also compare the stability of this spinel and the prefect spinel at high pressure.
Bender Koch C. Kasama T.	Telluric Iron from Wabar Impactite [#6439] We have analyzed magnetic sand sized grains from Wabar impactites. The elemantal analyses indicates that metallic iron has been formed. Most likely the iron originate from titano-magnetite occuring in the local drift sand (impact target).
Pittarello L. Fritz J. Roszjar J. Lenz C. Chanmuang N. C. Koeberl C.	Comparison of Different Spectroscopic Techniques in Investigating Shocked Plagioclase [#6277] Micro-Raman spectroscopy, photoluminescence, and cathodoluminescence revealed useful in characterizing the amorphization degree of experimentally shocked plagioclase.
Shirai N. Ebihara M.	Siderophile Element Fractionation in Impact Glass from the Wabar Impact Crater [#6284] Impact glass from the Wabar impact crater was analyzed by using INAA, IPAA and ICP-MS. Based on the analytical results, we discussed elemental fractionation during impact event.
Silber E. A. Moreno-Ibáñez M. Gritsevich M. Trigo-Rodríguez J. M. Silber R. E.	Evaluating Fidelity of Empirical Energy Relations for Determining Bolide Energy Deposition and Implications for Impact Hazard [#6440] We use well-documented and well-characterized published bolide records, and apply various energy relations developed over the years to compare and evaluate the outcomes, and establish the implications for impact hazard.