84th Annual Meeting of The Meteoritical Society

August 15–21, 2021

Chicago, Illinois

 

Program and Abstracts

 

Times listed are Central Daylight Time (CDT).  Time Zone Converter

6:30 a.m. PDT

8:30 a.m. CDT

9:30 a.m. EDT

3:30 p.m. CEST

10:30 p.m. JST

 

Wednesday, August 11, 2021

8:30 a.m.

 

Virtual Poster Session A

8:30 a.m.

 

Virtual Poster Session B

 

 

 

Monday, August 16, 2021

8:30 a.m.

Waldorf

Welcome and Introduction

9:00 a.m.

Waldorf

Moon

9:00 a.m.

Williford AB

Chondrules

12:00 p.m.

Waldorf

Townhall:  OSIRIS-REx Sample Analysis

1:30 p.m.

Williford AB

Achondrites I

1:30 p.m.

Waldorf

CAIs

6:00 p.m.

Waldorf

Barringer Lecture

 

 

 

Tuesday, August 17, 2021

8:30 a.m.

Williford AB

Missions

8:30 a.m.

Waldorf

Impacts

12:00 p.m.

Waldorf

Townhall:  Status of the Mars Sample Return Campaign

1:30 p.m.

Williford AB

Mars

1:30 p.m.

Waldorf

Presolar Grains

5:30 p.m.

Williford C

Poster Session

 

 

Achondrites

 

 

Carbonaceous Chondrites

 

 

Curation and Education

 

 

Enstatite and Ordinary Chondrites

 

 

Early Solar System: Disk Conditions and Processes

 

 

Space Weathering

 

 

Impacts

 

 

Mars and Moon

 

 

Missions

 

 

Micrometeorites

 

 

Chondrules and CAIs

 

 

Experiments

 

 

Small Bodies

 

 

 

Wednesday, August 18, 2021

8:30 a.m.

Waldorf

Meteoritical Society Award Ceremony 2020 and 2021

 

 

 

Thursday, August 19, 2021

8:30 a.m.

Williford AB

Carbonaceous Chondrites

8:30 a.m.

Waldorf

Achondrites II

12:00 p.m.

Waldorf

Meteoritical Society Business Meeting

1:30 p.m.

Williford AB

Disk Conditions and Processes

1:30 p.m.

Waldorf

Fireballs and Sources

 

 

 

Friday, August 20, 2021

8:30 a.m.

Williford ABC

Chondrites

8:30 a.m.

Waldorf

Organics and Ices

1:30 p.m.

Williford ABC

Parent Body Processes

1:30 p.m.

Waldorf

Potpourri

 

 

 

E-Posters and Abstracts

 

 

 

Saturday, August 21, 2021

8:30 a.m.

Field Museum of Natural History, Founders Room

Workshop on Meteorite Ownership and Legal Issues

 

Wednesday, August 11, 2021

VIRTUAL POSTER SESSION A

8:30 a.m.

Authors (*Denotes Presenter)

Abstract Title and Summary

Ipatov S. I.

Delivery of Bodies to the Earth and the Moon from the Zone of the Outer Asteroid Belt [#6040]
The probability of a collision with the Earth of a body with semi-major axis between 3 and 4 AU could be greater than that for greater semi-major axes. The zone of the outer asteroid belt could be one of the sources of the late heavy bombardment.

Ipatov S. I.

Delivery of Icy Planetesimals to Inner Planets in the Proxima Centauri System [#6042]
A lot of icy material (more than to the Earth) could be delivered to the inner exoplanets b and in the Proxima Centauri planetary system. A cometary cloud similar to the Oort cloud can exist in this system.

Johnson P. A.   Johnson J. C.   Mardon A.

Near-Earth Objects Impact Hazard Assessment Scales [#6001]
We describe the strengths and limitations of the Torino Scale and Palermo Technical Impact Hazard Scale for impact hazard assessment and future avenues for impact hazard modelling.

Kuznetsov E. D.

Orbital Evolution of Phaethon Cluster [#6100]
The age of the pair (3200) Phaethon – (155140) 2005 UD is more than 1 Myr. The age of the pair (3200) Phaethon – (225416) 1999 YC exceeds 100 kyr. The age of the pair (155140) 2005 UD – (225416) 1999 YC may be 50 kyr or more.

Kuznetsov E. D.   Vasileva M. A.   Rosaev A. E.   Plavalova E.

Some Examples of Close Asteroid pairs Interactions with Resonances [#6170]
Encounters with Mars have the strongest effect on the orbital evolution of pairs (9068) 1993 OD – (455327) 2002 OP28 and (88666) 2001 RP79 – (501710) 2014 UY23, moving in the vicinity of the 10–7S–3J three-body resonance with Saturn and Jupiter.

Ohnishi I.   Kadoi M.   Shibata M.

Preparation of TEM Specimens for Olivine with Specific Crystal Orientations from the Matrix in Allende CV3 Chondrite Using FIB-SEM and EBSD [#6053]
We prepared the TEM specimens from the randomly oriented olivine grains in the Allende matrix by a method combined with FIB (Focused Ion Beam) and EBSD (Electron Back Scattered Diffraction). Here, we report de-tails of the procedure and its results.

Bruno A.

An Archival and Oral History of the Tunguska Explosion [#6178]
This poster presentation will describe the research and results of a book project by a professional historian on the history of investigations into the Tunguska explosion of 1908 in Siberia.

Kling A. M.   Benner M. C.   Thompson M. S.   Greer J.   Diaz R. E.   Heck P. R.

The Search for Water in Lunar Soils Through Coordinated Analysis of Space Weathering Characteristics in an Apollo 17 Sample [#6241]
Hollow nanophase iron particles were identified in a vesicle-rich region of the space weathered rim in a mature lunar mare grain. Coordinated analyses may shed light on the relationship between vesicles, water, and the hollow nanoparticles.

Krämer Ruggiu L.   Beck P.   Gattacceca J.   Eschrig J.

Visible-Infrared Spectroscopy of Ungrouped and Rare Meteorites Brings Further Constraints on Meteorite-Asteroid Connections [#6160]
We studied 25 ungrouped chondrites and rare meteorite groups using VIS-NIR reflectance spectroscopy and compared their spectra to end-members spectra of asteroids taxonomy to find potential link of ungrouped meteorites to their parent bodies.

Kampf C. E.   Hamann C.   Schäffer S.   Heunoske D.   Hasse T.   Hecht L.   Greshake A.   Osterholz J.

Laser-Irradiation of an Ordinary Chondrite:  Simulation of Atmospheric Entry of Chondritic Materials and Links to the Formation of Micrometeorites [#6256]
Here we compare petrography and microchemistry of quenched melts produced from an ordinary chondrite in a 1-bar laser-irradiation experiment to recently described urban micrometeorites and fusion crusts developed around ordinary chondrites.

Hill P. J. A.   Chevalier M.   Herd C. D. K.   Hilts R. W.

Advancing the Curation of Aldehydes and Ketones for Applications to Carbonaceous Chondrite Curation and Cometary Nucleus Sample Return [#6119]
The aim of this study is to examine the reactivity of carbonyl compounds under a variety of conditions to provide insight into the curation and handling requirements of organic-rich astromaterials.

Nissinen M.   Gritsevich M.   Oksanen A.   Suomela J.

Modeling of Cometary Dust Trails [#6010]
We present the ‘Dust Trail kit’ model describing the evolution of cometary dust trails. As a case study, we demonstrate our analysis of the physical and spatial characteristics of the dust trail produced by the 2007 explosion of comet 17P/Holmes.

MSPG2 Team   Beaty D. W.   Carrier B. L.   Kminek G.   Meyer M. A.   Haltigin T.   Hays L. E.   Agee C. B.   Busemann H.   Cavalazzi B.   Cockell C. S.   Debaille V.   Glavin D. P.   Grady M. M.   Hauber E.   Hutzler A.   Marty B.   McCubbin F. M.   Pratt L. M.   Regberg A. B.   Smith A. L.   Smith C. L.   Summons R. E.   Swindle T. D.   Tait K. T.   Tosca N. J.   Udry A.   Usui T.   Velbel M. A.   Wadhwa M.   Westall F.   Zorzano M.-P.

Summary of Mars Sample Return (MSR) Science Planning Group 2:  Planning for the Arrival and Analysis of MSR Samples at Earth [#6242]
MSPG2’s overarching aims were to build upon previous efforts in defining an end-to-end MSR Science Program, and addressing important issues that will influence the design and implementation of the Sample Receiving Facility.

Safronova V. S.   Kuznetsov E. D.

Estimation of the Age of Two Young Pairs of Asteroids [#6144]
The age of the pair (87887) 2000 SS286 – (415992) 2002 AT49 ranges from 7.58 ± 0.035 to 8.8 ± 0.043 kyr; for the pair (320025) 2007 DT76 – (489464) 2007 DP16 one ranges from 15.4 ± 0.96 to 29.5 ± 0.04 kyr depends on the semimajor axis Yarkovsky drift.

Ovcharenko A. V.   Schapov V. A.   Muravyev L. A.

Geophysical Search of the Sterlitamak Meteorite [#6046]
We describe the results of our geophysical studies (magnetic survey) on the territory of the crater formed after the fall of the sterlitamak meteorite. On our opinion, a significant mass of the meteorite may still be in the crater.

Christ O.   Barbaro A.   Brenker F. E.   Domeneghetti M. C.   Nestola F.

Shock Temperature Records in Graphite from the Northwest Africa 6871 Ureilite [#6052]
Northwest Africa 6871 was studied by XRD and µ-Raman. It contains aggregates of nanographite and micro/nanodiamond. A graphite-geothermometer revealed a temperature of 1412 °C, which we ascribed to the shock event which destroyed the parent body.

Andreev A. O.   Nefedyev Y. A.

Analysis of Broadband Color Characteristics and Spectral Distribution of Asteroids with Small Perihelion Distances [#6057]
The purpose of this study is to analyze the genetic relationships of asteroids with small perihelion distances with meteor showers by broadband color characteristics based on modern optical observations with various color filters.

Andreev A. O.   Nefedyev Y. A.

Creation of an Imitation Model of Near-Sun Asteroids with Small Perihelion Distances [#6058]
The work is focused on creating a simulation model of near-Sun asteroids (NSAs) with small perihelion distances. The model includes astrophysical parameters of these objects, size distribution and their dynamic behavior in space.

Churkin K. O.   Nefedyev Y. A.   De La Morena C.   Andreev A. O.   Ahmedshina E. N.

Analysis of Digital Model of Titan Using Fractal Geometry and Automated Complex for Studies [#6113]
This work aims at considering the issues of regression modeling of the surface of Saturn’s moon, Titan and at studying the produced model by means of fractal geometry. Based on data collected by NASA Cassini the Titan surface model was created.

Churkin K. O.   Andreev A. O.   Nefedyev Y. A.

Creation of a Unified Selenocentric System Using Quantum Optical Systems [#6114]
The work is devoted to the development of a method for creating a unified selenocentric system for a space satellite in a circumlunar orbit (SSCLO) and reference objects on the lunar surface using quantum optical devices.

Nefedyev Y. A.   Sergienko M. V.   Andreev A. O.

Analysis of Orbital Elements of Near Earth Objects over a Long-Term Period [#6087]
The aim of this work is to analyze the changes in orbital elements of near earth objects (NEO) and to identify them with the meteor shower Delta Cancrids (MSDC). For MSDC connections with asteroids were investigated.

Nefedyev Y. A.   Sergienko M. V.   Andreev A. O.

The Coordinate Ranging of the Delta Cancrids Meteor Shower [#6088]
The aim of this work is to refine the radiants distribution of the meteor shower Delta Cancrids (MSDC) branches and their drift motion and to study features of radiants distribution and orbit elements for MSDC using television observations.

 

Wednesday, August 11, 2021

VIRTUAL POSTER SESSION B

8:30 a.m.

Authors (*Denotes Presenter)

Abstract Title and Summary

Johnson P. A.   Johnson J. C.   Mardon A. A.

Utilization of Nano-Vibration for Microbial Life Sensing [#6085]
Almost 50 years ago, we first detected bio-signatures and evidence of microorganisms in meteorites. We propose the utilization of nanoscale vibration technology for its use in meteorite sampling and detection of these bio-signatures in meteorites.

Morin S. M.   Barnes J. J.   Wilbur Z. E.   Stadermann A. C.   Domanik K.   McCubbin F. M.

Assessing the Volatile Inventory of Basaltic Fragments in Luna Soils [#6229]
We investigate the mineralogy, chemistry, and volatile systematics of basalt fragments in Luna 16 and 24 soils. The overall goal is to better understand the origin(s) of chlorine isotope fractionation on the Moon.

Lee M. R.   Martin P. M. C.   Floyd C. J.   Jenkins L.

A Xenolith from an Early Formed Parent Body in the CM Carbonaceous Chondrite LaPaz Icefield 02239 [#6176]
Why do so few xenoliths in CM carbonaceous chondrites have a fine-grained rim? What does that tell us about the transport of lithic fragments through the disk?

Jenkins L. E.   Lee M.   Daly L.   King A. J.   Chung P.

Identification of Clasts in CM Chondrite Fall Kolang with S and Ca [#6161]
Clasts experienced / Alteration with fluids / Of varied makeups.

Pickersgill A. E.   Lee M. R.   Lindgren P.   Daly L.   Whitehouse M. J.   Griffin S.   Hallis L.

Seeking Evidence of Life in Sulphides from the Boltysh Impact Structure [#6181]
Boltysh, was there life? / Did it eat tasty sulphur? / Isotopes will tell.

Lowe H.   Daly L.   Lee M. R.

Evidence of Micro-Faulting Within Ureilite Miller Range (MIL) 090980 [#6045]
This abstract presents new EDS data from the ureilite sample Miller Range (MIL) 090980. Found within the data sets is evidence of micro-faulting throughout the sample affecting carbon and iron-rich veins.

Sheikh D.

Petrology and Geochemistry of Errachidia 004, a Polymict Winonaite Composed of Distinct High and Low Metal Lithologies [#6253]
Errachidia 004 is a recently recovered polymict winonaite from Morocco in 2020 that exhibits two distinct lithologies with varying metal abundances:  1) a metal-depleted ultramafic melt residue and 2) a silicate-rich IAB of basaltic composition.

Wilbur Z. E.   Barnes J. J.   Eckley S. A.   Zeigler R. A.

Investigating the Petrogenesis and Eruption Histories of Apollo 15 and Apollo 17 Basalts [#6130]
Apollo basalts/Contain vesicles and vugs/How were they emplaced?

Mouti X.   Davidson J.   Schrader D. L.   Bullock E. S.

Fine-Grained Rims in Mighei-Like Carbonaceous Chondrites:  Support for a Nebular Origin [#6129]
Fine-grained chondrule rims were analyzed in six CM chondrites and their abundances and sizes were determined. Results indicate rims formed in the nebula.

Barnes J. J.   Wilbur Z. E.   Domanik K.

Phosphate Chemistry in Brachinites and Brachinite Like Meteorites [#6300]
In this work, we investigate the textural occurrence of phosphates and their chemistry in brachinite and brachinite-like meteorites.

Koch T. E.   Spahr D.   Tkalcec B. J.   Christ O.   Genzel P.-T.   Merges D.   Wilde F.   Winkler B.   Brenker F. E.

Formation of Fused Aggregates Aboard the ISS with Implications for Early Solar System Particle Aggregattion [#6043]
We carried out an experiment under long-term microgravity conditions aboard the ISS to fuse particles in order to study early solar system particle aggregation.

Di Y.   Sapah M. S.   Amelin Y.

Complex Pb Isotopic Contamination in CAIs from Northwest Africa 4502 [#6033]
Pb isotopic systems of CAIs from NWA 4502 CV chondrite show strong and complex terrestrial contamination signatures. The Pb contamination in CAIs is difficult to completely remove by acid leaching, and requires a more effective cleaning procedure.

Pittarello L.   Chernonozhkin S. M.   Goderis S.   Vanhaecke F.   Downes H.

A Puzzling Fragment from the Dyalpur Ureilite:  Anomalous Components, Microstructures, and Geochemistry [#6024]
The investigated fragment presents the following unusual features for ureilites:  presence of amphibole clasts in an olivine-rich matrix, unusual high Co content in sulfides, uncommon Mn and Cr content in olivine.

Anand A.   Pape J.   Mezger K.   Hofmann B.

Cr and O Isotopes Link IVA Irons and LL Chondrites [#6154]
Investigation of the association between IVA irons and L/LL ordinary chondrites within ε54Cr vs. Δ17O space based on ε54Cr values obtained from chromite (FeCr2O4) or daubréelite (FeCr2S4) inclusions in IVA iron meteorites.

Hwang S. L.   Shen P.   Varela M. E.   Saavedra M.   Yui T. F.   Chu H. T.

Electron Microscopic Study of Graphite in the Vaca Muerta Mesosiderite [#6019]
Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies coupled with energy dispersive X-ray (EDX) analysis in the Vaca Muerta mesosiderite give some hints about graphite formation.

Hwang S. L.   Saavedra M.   Shen P.   Varela M. E.   Chu H. T.   Yui T. F.

A Transmission Electron  Microscopy Study of the Olivine Coronas in the Vaca Muerta Mesosiderite [#6018]
A transmission electron microscopy (TEM) coupled with energy dispersive X-ray (EDX) analysis was performed to shed light on the main process under which the Vaca Muerta coronas were formed.

Demina N. Y.   Nefedyev Y. A.   Andreev A. O.

Analysis of the Unified Digital Database of Observations of Modern Satellite Lunar Missions [#6054]
The aim of this work is to analyze the unified digital database of optical observations obtained during the satellite lunar missions. A transformation method was created for the coordinate systems and mega-relief of the Moon.

Demina N. Y.   Andreev A. O.   Nefedyev Y. A.

Modeling the Lunar Physical Parameters Using Complex Systems Methods [#6056]
The aim of this work is analysis of stochastic and dynamical features of time series describing the satellite measurements of gravitational fields and parameters of lunar physical libration (LPL).

Zagidullin A. A.   Andreev A. O.   Nefedyev Y. A.

Automated Stochastic Analytical Complex for the Analysis of Satellite Observations of the Gravitational Field and Physical Libration of the Moon [#6212]
The work is focused to the development of a software for two-parameter cross-correlation dependence construction in order to describe stochastic similarity in time series of satellite observations of gravity field and lunar physical libration.

Zagidullin A. A.   Nefedyev Y. A.   Andreev A. O.

The Simulation System for Determining the Positions of Lunar Objects on the Basis of Satellite Observations in the Selenocentric System [#6214]
The work is focused to the creation of the software simulation system for determining the positions of lunar objects on the basis of satellite observations in the selenocentric system using the lunar space missions data.

 

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Monday, August 16, 2021

MOON

8:30 a.m.   Waldorf

Chairs:  Ryan Zeigler and Amanda Stadermann

Times

Authors (*Denotes Presenter)

Abstract Title and Summary

8:30 a.m.

Heck, P. R. *

Welcome Remarks

8:45 a.m.

Ciesla, F. J. *

Welcome Remarks

9:00 a.m.

Fegley B. Jr. *   Lodders K.

Condensation Chemistry of Dry Bulk Silicate Earth Material [#6131]
We give condensation calculations for dry bulk silicate Earth material at 1e-6 to 1e+2 bars and T up to 6000 K with thermal ionization and non-ideal molten oxide solution. Our work constrains lunar formation and molten silicate evaporation with fO2.

9:15 a.m.

Dauphas N. *   Nie N. X.   Blanchard M.   Zhang Z. J.   Zeng H.   Hu J. Y.   Meheut M.   Visscher C.   Canup R.   Hopp T.

Are K and Rb Uniformly Depleted in Lunar Rocks? [#6226]
Variations in K/U and Rb/Ba ratios in lunar rocks have a magmatic origin. We present two approaches to see through these magmatic processes and estimate the composition of the Moon.

9:30 a.m.

Stadermann A. C. *   Barnes J. J.   Erickson T. M.   Zega T. J.

Apollo Sample 64455:  Petrologic and Geochemical Characterization of a Glass-Coated Impact Melt Rock [#6261]
Metamorphism / On contact with impact melt / In Apollo rock.

9:45 a.m.

Greer J. *   Zhang B.   Isheim D.   Seidman D. N.   Bouvier A.   Heck P. R.

Atom Probe Tomography of 4.45 Ga Lunar Zircon from the Apollo 17 Civet Cat Norite Clast [#6134]
APT analysis of zircon from the Civet Cat norite clast of Apollo 17 impact melt breccia 72255 reveals Pb distribution at the nanoscale, important for interpreting NanoSIMS U-Pb and Pb-Pb ages.

10:00 a.m.

Treiman A. H. *   Semprich J. J.

Lunar Feldspathic Breccia Northwest Africa (NWA) 11421:  Clasts in the Corners [#6065]
Fragments of weird rock / Dispersed in lunar matrix / On old X-ray maps.

10:15 a.m.

Zeigler R. A. *   Gross J.   Eckley S.   Vander Kaaden K. E.

Petrology, Geochemistry, and Pairing of Lunar Meteorites from the Dominion Range [#6141]
Initial results of electron microprobe and X-ray computed tomography (XCT) studies of the seven new DOM lunar meteorites and a look at the details of their petrography and mineral chemistry, as well as investigate possible pairing relation-hips.

PRE-RECORDED PRESENTATION

10:30 a.m.

Morino P. *   Schönbächler M.   Maden C.   Busemann H.

A Combined Study of Cr Isotope and Noble Gas Composition of 18 Apollo Samples [#6150]
This study aims to combine high precision Cr isotope and noble gas measurements of Apollo samples to first determine the Cr isotope composition of the Moon and then tighten the constraints on the origin and composition of Theia.

10:40 a.m.

 

Q&A

 

Monday, August 16, 2021

CHONDRULES

9:00 a.m.   Williford AB

Chairs:  Alexander Ruzicka and Marina Gemma

Times

Authors (*Denotes Presenter)

Abstract Title and Summary

9:00 a.m.

Ruzicka A. M. *   Hugo R. C.

Probing the Thermal and Deformation Histories of Chondrules in a Cluster Chondrite Lithology of Northwest Africa 5205 with Electron Backscatter Diffraction (EBSD) Techniques [#6109]
Most chondrules in a cluster lithology of NWA 5205 (LL3.2) accreted while warm, but some chondrules were cool, and some were deformed and reheated prior to agglomeration.

9:15 a.m.

Zhang M. *   Fukuda K.   Siron G.   Kita N. T.   Ushikubo T.

Primitive Chondrule Minerals (PCM) Line-A Mix of Two Trends? [#6036]
We reanalyzed Acfer 094 chondrite chondrules and prove that the PCM line could be a mix of two trends, the one below is represented by typical CC chondrules and the one above is represented by those chondrules mixed with OC chondrule-like materials.

9:30 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.

Highly Volatile Element (H, C, F, Cl, S) Abundances and H Isotopic Composition in Chondrules from Carbonaceous and Ordinary Chondrites [#6283]
Most of the highly volatile elements or HVEs (H, C, F, Cl, S) in chondrules were likely introduced during parent body processes. However, the small but measurable amount of HVEs in melt inclusions in chondrule phenocrysts may be primary HVEs.

9:45 a.m.

Fukuda K. *   Tenner T. J.   Kimura M.   Tomioka N.   Siron G.   Ushikubo T.   Chaumard N.   Hertwig A. T.   Kita N. T.

A Temporal Shift of Chondrule Generation from the Inner to Outer Solar System [#6030]
The Al-Mg ages of chondrules from pristine CM and CO chondrites are systematically younger than those of the majority of ordinary chondrite chondrules, suggesting a delayed chondrule formation in the outer Solar System.

10:00 a.m.

Gemma M. E. *   Gonzales J. C.   Ebel D. S.

Trace Element Diversity of Chondrule Mesostasis in CV and CR Chondrites [#6232]
We present trace element analyses of chondrule mesostasis in CV and CR chondrites. This statistically significant dataset complements existing major element and isotopic datasets and addresses formation theories of chondrites and their constituents.

PRE-RECORDED PRESENTATION

10:15 a.m.

Kadlag Y. *   Leya I.   Mezger K.   Bouvier A.-S.   Haberthür D.   Hlushchuk R.

Timing and Environment of Chondrule Formation [#6060]
Combining temporal information (from Al-Mg relative ages) with environment (from isotope ratios of He, Ne and Ar) of chondrules to understand early solar system processes and chondrule formation conditions.

10:25 a.m.

 

Q&A

 

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Monday, August 16, 2021

ACHONDRITES I

1:30 p.m.   Williford ABC

Chairs:  Zoltan Vaci and Paul Warren

Times

Authors (*Denotes Presenter)

Abstract Title and Summary

1:30 p.m.

Warren P. H. *   Rubin A. E.

Northwest Africa 12969:  Diamonds and Siderophile-Element Evidence Suggest Kinship, or at Least Petrogenetic Analogy, with Extreme-Magnesian Ureilites [#6285]
The NWA 12969 harzburgitic, ultra-magnesian achondrite contains diamonds in clumps up to 70 microns long, and has a ureilite-like pattern of siderophile element depletions, although bulk Zn is low, and Ni/Au ratio is high, by ureilite standards.

1:45 p.m.

Rubin A. E. *   Zhang B.

The Nordheim Trio:  IAB-an Irons that Experienced Devolatilization and Silicate Vaporization [#6011]
The Nordheim Trio comprises three IAB-an ataxites [Nordheim, ALH 77255, Babb’s Mill (Blake’s Iron)] that experienced impact-devolatilization, silicate vaporization and quenching. A silica glass spherule in ALH 77255 formed by fractional condensation.

2:00 p.m.

Zhang B. *   Chabot N. L.   Rubin A. E.

Fractional Crystallization Modeling of Carbonaceous-Type Iron Meteorites [#6122]
We present comprehensive fractional-crystallization modeling of the CC-type groups (IIC, IID, IIF, IIIF, IVB) and the South Byron Trio to reconstruct their crystallization processes and initial compositions and to compare CC-type asteroidal cores.

2:15 p.m.

Vaci Z. *   Yin Q.-Z.   Dey S.   Miller A.   Ziegler K.   Day J. M. D.   Agee C. B.   Pack A.

Chromium and Oxygen Isotopic Compositions of Ultramafic Achondrites:  Implications for the Missing Mantle Problem in the Asteroid Belt [#6067]
New oxygen and chromium isotopic analyses show that olivine-rich cumulate achondrites are associated with at least two unique parent bodies and potentially the “anomalous” HED meteorites.

PRE-RECORDED PRESENTATIONS

2:30 p.m.

Neumann W. *   Ma N.   Neri A.   Schwarz W. H.   Ludwig T.   Trieloff M.   Klahr H.   Bouvier A.

Thermal History and Structure of the Tafassite Parent Body [#6153]
We identified a first group of carbonaceous primitive achondrites and proposed to name them Tafassites. We studied their Pb-Pb SIMS chronological records and constrained the accretion and thermal evolution of their parent body by numerical modeling.

2:40 p.m.

Hamann C.   Collinet M. *   Schwinger S.   Kaufmann F. E. D.   Bonato E.   Greshake A.   Maturilli A.   Helbert J.   Hecht L.

Petrography of Fine-Grained Domains in Ungrouped Achondrite Erg Chech 002:  Evidence for Different Cooling Histories? [#6236]
Here we describe the petrography of previously unknown, fine-grained magmatic domains in ungrouped achondrite Erg Chech 002 and discuss the implications for a multistage cooling and crystallization history.

2:50 p.m.

Hahn T. M. Jr *   Bose M.

Primitive Achondrite Parent Bodies are Volatile-Rich Compared to Differentiated Achondrites [#6227]
Water contents and D/H ratios were measured in nominally anhydrous minerals in two Ureilites (LAP 03587 and CMS 04048) and two Brachinites (EET 99402 and GRA 06129). Primitive achondrites are volatile-rich compared to differentiated achondrites.

3:00 p.m.

Davies F. *   Daly L.   Hallis L.   Lee M.

Deformation and Mineral Relationship of Achondrite Meteorites to Reconstruct the Geological History of Their Protoplanets [#6171]
This project is investing achrondrite meteorites ureilite:  Havero, Nova 001, Reid 016; Aubrite: Cumberland Falls; and an anomoulous achondrite: MIL 090356, studying the deformation and mineral relationship of these meteorites using SEM-EDS and EBSD.

3:10 p.m.

Khan H. *   Leya I.

Re-Establish the Potassium Dating System for Iron Meteorites [#6145]
The work presented is a follow-up on the oral presentation I had the opportunity to give at MetSoc2019. I am extremely excited to present this new development as there has not been anything done like this in the last 30 years.

3:20 p.m.

Barbaro A. *   Domeneghetti M. C.   Litasov K. D.   Ferrière L.   Pittarello L.   Christ O.   Lorenzon S.   Alvaro M.   Nestola F.

Carletonmooreite (Ni3Si) in Shocked Diamond Bearing Kenna Ureilite [#6066]
Our results on Kenna show that the association of nano-, micro-diamonds and nanographite found in ureilites was produced by impacts at peak pressures at least of ~15 GPa and the presence of Ni3Si highlights the role of Fe-Ni phases in diamond growth.

3:30 p.m.

Danoix F. *   Cadel E.   Cuvilly F.   Danoix R.   Gounelle M.   Kern L.   Roskosz M.

Nanostructure and Nanochemistry of Selected Iron Meteorites Obsserved at the Nanometric Scale [#6207]
We report the observation and chemical analysis by atom probe tomography of selected iron meteorites at the nanometer scale, and aim at illustrating how nano structural/chemical features bear information related to their thermo-mechanical history.

3:40 p.m.

 

Q&A

 

Monday, August 16, 2021

CAIs

1:30 p.m.   Waldorf

Chairs:  Prajkta Mane and Emilie Dunham

Times

Authors (*Denotes Presenter)

Abstract Title and Summary

1:30 p.m.

Mane P. *   Ross D. K.   Simon J. I.

A Population Study of the Refractory Inclusions in Miller Range (MIL) 090019 CO3 Carbonaceous Chondrite [#6275]
We present a particle size distribution study of CAIs from MIL 090019 CO3 chondrite that provides insights into the accretionary processes.

1:45 p.m.

Torrano Z. A. *   Desch S. J.   Dunham E. T.   Williams C. D.   Mane P.

A Reassessment of the Titanium Isotopic Compositions of FUN CAIs [#6262]
In FUN CAIs / Titanium is a clue / For late formation.

2:00 p.m.

Dunham E. T. *   Liu M.-C.   Matsuda N.   McKeegan K. D.

CAIs in Ordinary and Enstatite Chondrites [#6133]
NC CAIs / Very small and rare, unlike / CC CAIs.

2:15 p.m.

Ramprasad T. *   Seifert L. B.   Zega T. J.

A Microstructural Examination of a Refractory-Siderophile Nugget from the Northwest Africa 8323 CV3 Chondrite [#6123]
We investigate the structure and chemical composition of a polyphasic refractory-siderophile nugget from a CV3 chondrite, using electron microscopy techniques to gain insight into its origin.

2:30 p.m.

Matsuda N. *   Liu M.-C.   McKeegan K. D.

Petrography, Oxygen, and Magnesium Isotopic Compositions of Hercynite-Rich CAIs from CO3 Chondrites [#6110]
We present the results of petrological characterizations, oxygen, and magnesium isotopic compositions of hercynite-rich inclusions in order to better understand the effects of secondary processing.

PRE-RECORDED PRESENTATION

2:45 p.m.

Han J. *   Liu M.-C.   Matsuda N.   Park C.   Keller L. P.

Mineralogical and Al-Mg Isotopic Study of Fine-Grained Ca-Al-Rich Inclusions [#6267]
We present high-precision Al-Mg isotopic data of fine-grained CAIs from reduced CV3 chondrites, coordinated with FIB/TEM analyses, to elucidate their formation conditions and timescales in comparison with coarse-grained CAIs.

2:55 p.m.

Liu M.-C. *   Matsuda N.   Dunham E. T.   McKeegan K. D.

The Discovery of HIDALGO, a New Hibonite Inclusion with FUN Characteristics, in Dar Al Gani 027 (CO3) [#6084]
What is HIDALGO? / It has fractionated oxygen isotopes and low 26Al / It is probably a FUN inclusion!

3:05 p.m.

Martin P. M. C. *   Lee M. R.

The Conspicuous Compound Chondrule-CAI Conundrum:  A Case Study Within the Brecciated CM2.2 Lithology of the Carbonaceous Breccia Aguas Zarcas [#6190]
Discovery of a new Compound Chondrule-CAI (CCCAI) within the brecciated CM2.2 lithology of the carbonaceous breccia Aguas Zarcas. Little cockerel / Why do you carry a ball? / Tell me your secrets.

3:15 p.m.

Krot A. N. *   Nagashima K.   MacPherson G. J.

On the Nature of Oxygen Isotope Heterogeneity of Igneous Calcium-Aluminum-Rich Inclusions in CV (Vigarano-Type) Carbonaceous Chondrites [#6136]
Melilite, anorthite, Ti-rich fassaite, perovskite, and davisite in the Allende igneous CAIs experienced postcrystallization mineralogically controlled O-isotope exchange with the external 16O-poor reservoir (Δ17O ~ –3‰), most likely aqueous fluid.

3:25 p.m.

Manga V. R. *   Zanetta P. M.   Thakur A.   Muralidharan K.   Zega T. J.

Thermodynamic Modeling of Equilibrium Solubilities of Ti in Minerals of Calcium-and-Aluminum-Rich Inclusions Under Nebular Conditions [#6293]
The crystal chemistries of pristine minerals that are found within CAIs when analyzed in conjunction with thermodynamic calculation of condensation, reveal the thermochemical landscape of the high temperature region of the early solar nebula.

3:35 p.m.

 

Q&A

 

Monday, August 16, 2021

Barringer Lecture

6:00 p.m.   Waldorf

 

Barringer Lecture:  Prof. Leslie Rogers, The University of Chicago: Glimpsing the Exoplanet Composition Distribution

 

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Tuesday, August 17, 2021

MISSIONS

8:30 a.m.   Williford ABC

Chairs:  Pierre Haenecour and Nancy Chabot

Times

Authors (*Denotes Presenter)

Abstract Title and Summary

8:30 a.m.

Chabot N. L. *   Rivkin A. S.   Cheng A. F.   Adams E. Y.   Reynolds E. L.   DART Team

DART – The Double Asteroid Redirection Test Mission [#6074]
DART, the Double Asteroid Redirection Test, is NASA’s first mission that is dedicated to demonstrating a planetary defense mitigation technology. DART is planned to launch in November 2021 and to impact the asteroid Dimorphos in Fall of 2022.

8:45 a.m.

Parker E. T. *   Chan Q. H. S.   Glavin D. P.   Dworkin J. P.

Extraterrestrial Non-Protein Amino Acids Identified in Carbon-Rich Particles Returned from Asteroid Itokawa [#6101]
The results of this study mark the first evidence of extraterrestrial amino acids in asteroid material collected during a sample-return mission and returned to Earth.

9:00 a.m.

Ishimaru K. *   Lauretta D. S.

Modeling of Sediment Deposition on asteroid Bennu’s Parent Body [#6080]
We analyzed clast size distribution and thickness of layered structures on Bennu’s boulders using OSIRIS-REx data. The observed parameters were used to model the hydrothermal flow in the parent body.

9:15 a.m.

Chaves L. C. *   Thompson M. S.

Sulfur and Nickel Depletion in Space Weathered Sulfides from Asteroid Itokawa [#6234]
Despite the relevance of sulfides in airless body regoliths, their response under space weathering conditions is still poorly understood. Here, we report S and Ni depletion as result of space weathering on sulfides from asteroid Itokawa.

9:30 a.m.

Ryan A. J. *   Craddock Z. A.   Cherian S. K.   Gibson M. N.   McCommon A. T.   Ochoa A. D.   Ouyang J.   Siegler M.   Lauretta D. S.

Thermal Conductivity Measurement Plan for Samples Returned by OSIRIS-REx [#6237]
Plans are presented for a nondestructive, noncontact method to measure sample thermal conductivity.

9:45 a.m.

Haenecour P. *   Bennett C. A.   Crombie M. K.   Fitzgibbon M.   Ferro A.   Hammond D.   McDonough E.   Westermann M. M.   Barnes J. J.   Connolly H. C. Jr.   Lauretta D. S.

The OSIRIS-REx Sample Analysis Micro Information System (SAMIS) [#6083]
The OSIRIS-REx mission is developing the Sample Analysis Micro Information System (SAMIS) with the goals of facilitating sample analysis by mission scientists, as well as fostering data stewardship practices.

PRE-RECORDED PRESENTATION

10:00 a.m.

Van Ginneken M. *   Wozniakiewicz P. J.

Impact Experiments of Chondrule Fragments on Stardust Analogue Foils:  Clues to the Nature of Chondrule-Like Material in Wild 2 [#6167]
We present an experimental study of craters and residues resulting from the impact of fragments of chondrules on Stardust analogue foils. Comparison with Stardust data will allow drawing comprehensive picture of the chondrule population in Wild 2.

10:10 a.m.

Daly L. *   Lee M. R.   Darling J. R.   McCarrol I.   Yang L.   Cairney J.   Forman L. V.   Bland P. A.   Benedix G. K.   Fougerouse D.   Rickard W. D. A.   Saxey D. W.   Reddy S. M.   Bagot P. A. J.

Ice Ice Baby:  Improving Water Quantification of Hydrous Minerals by Cryo-Focussed Ion Beam and Cryo Vaccum Transfer to Atom Probe [#6032]
Phyllosilicates are key targets for upcoming sample return missions, we outline a new cryo-FIB to atom probe approach that detects novel nanophases and provides accurate quantification of the water abundance of phyllosilicates.

10:20 a.m.

Westphal A. J. *   Pister K. S. J.   Alvara A.

Rapid Multi-Comet Sample Return Using Swarms of Tiny Interplanetary Spacecraft [#6174]
Spectacular advances in the last decade in microelectronics and MEMS technology enable the development of tiny (~10g), inexpensive, autonomous spacecraft that could be used for rapid sample return from dozens of comets.

10:30 a.m.

Bibring J. P. *   Pilorget C.   Okada T.   Hamm V.   Brunetto R.   Yada T.   Loizeau D.   Riu L.   Usui T.   Moussi-Soffys A.   Hatakeda K.   Nakato A.   Yogata K.   Abe M.   Aléon-Toppani A.   Carter J.   Chaigneau M.   Crane B.   Gondet B.   Kumagai K.   Langevin Y.   Lantz C.   Le Pivert-Jolivet T.   Lequertier G.   Lourit L.   Miyazaki A.   Nishimura M.   Poulet F.   Arakawa M.   Hirata N.   Kitazato K.   Nakazawa S.   Namiki N.   Saiki T.   Sugita S.   Tachibana S.   Tanaka S.   Yoshikawa M.   Tsuda Y.   Watanabe S.

First NIR Hyper-Spectral Imaging of Hayabusa2 Returned Samples by the MicrOmega Microscope within the ISAS Curation Facility [#6276]
We present the preliminary outcomes of the analyses performed with MicrOmega (a hyperspectral NIR microscope) on asteroid Ryugu samples collected and returned by the Hayabusa2 mission.

10:40 a.m.

Yada T. *   Abe M.   Nakato A.   Yogata K.   Miyazaki A.   Kumagai K.   Hatakeda K.   Okada T.   Nishimura M.   Furuya S.   Yoshitake M.   Iwamae A.   Soejima H.   Hitomi Y.   Riu L.   Lourit L.   Pilorget C.   Hamm V.   Brunetto R.   Bibring J.-P.   Cho Y.   Yumoto K.   Yabe Y.   Sugita S.   Tachibana S.   Sawada H.   Sakamoto K.   Hayashi T.   Yamamoto D.   Fukai R.   Sugahara H.   Yurimoto H.   Usui T.   Watanabe S.   Tsuda Y.

Initial Descriptions of Asteroid Ryugu Samples Returned by Hayabusa2 [#6186]
C-type asteroid Ryugu samples returned by Hayabusa2 experienced initial descriptions conducted by JAXA. They are described with an optical microscope, a balance, a visible spectrometer, an FT-IR, and a MicrOmega.

10:50 a.m.

 

Q&A

 

Tuesday, August 17, 2021

IMPACTS

8:30 a.m.   Waldorf

Chairs:  Christian Koeberl and George Flynn

Times

Authors (*Denotes Presenter)

Abstract Title and Summary

8:30 a.m.

Flynn G. J. *   Durda D. D.   Strait M. M.   Macke R. J.

Limits on Asteroid Kinetic Impact Deflection from Hypervelocity Cratering [#6037]
Hypervelocity impact experiments show the maximum momentum change without disruption for a carbonaceous meteorite is ~10x less than for an ordinary chondrite, and deflection of carbonaceous asteroids may require multiple successive impacts.

8:45 a.m.

Knicely J. J. C. *   Herrick R. R.   Daly T.   Barnouin O.

A Reexamination of Low-Velocity Oblique Cratering with New Techniques [#6290]
We reexamine low-velocity oblique cratering with new techniques. These experiments are a prelude to high-velocity experiments, but may have relevance to secondary cratering on terrestrial bodies.

9:00 a.m.

Alexander A. M. *   Marchi S.   Chocron S.   Walker J.

Modeling Impact-Induced Porosity and Fracturing on Fe-Ni Bodies [#6200]
In this work, we use CTH and iSALE shock physics codes to explore impact-induced porosity and fracturing in materials relevant to Asteroid (16) Psyche (Fe-Ni alloys and iron meteorites) and compare with previous in situ impact experiments.

9:15 a.m.

Feignon J.-G.   Schulz T.   Ferrière L.   Goderis S.   de Graaff S. J.   Kaskes P.   Déhais T.   Claeys P.   Koeberl C. *

Examining the (Potential) Presence of a Preserved Impactor Signature in the Impact Melt Rocks of the Chicxulub Impact Structure Peak Ring [#6238]
Here are presented results related to the search for the presence of a possible meteoritic component within the Chicxulub impact structure peak ring impact melt rocks, using detailed highly siderophile element and Re-Os isotopic investigations.

9:30 a.m.

Huber M. S.   Kovaleva E.   Mautle F.   Hainsworth J.   Koeberl C. *

First Discovery of Proximal Vredefort Impact Ejecta in South Africa [#6240]
We report on the first discovery of possible proximal ejecta from the Vredefort impact event.

9:45 a.m.

Koeberl C. *   Mojzsis S. J.

The Needle in the Haystack Problem:  Search for Meteoritic Contamination and Identification of Projectile Type in Terrestrial Impact Events [#6194]
It is very difficult to distinguish some meteorite types in terms of meteoritic contamination in impact melt rocks and ejecta, but this is of particular importance for the early Archean impact record.

PRE-RECORDED PRESENTATION

10:00 a.m.

Ciocco M. *   Roskosz M.   Gounelle M.   Fiquet G.   Leroux H.

Self-Consistent Determination of Impact Timescales by Growth and Diffusion Kinetics of Olivine and Pyroxene Polymorphs in 3 Highly Shocked L Chondrites [#6132]
Microstructures and chemical partitions of high pressure polymorphs are characterized by nanoSIMS and STEM in 3 shocked L chondrites. Insights on the transformation mechanisms and associated elemental diffusion provide new shock timescales.

10:10 a.m.

Schmalen A. *   Luther R.   Artemieva N.

Campo del Cielo Strewn Field:  Modeling and Comparison with Observations [#6044]
Reconstruction of the Campo del Cielo impact event, i.e., to estimate the minimal pre-atmospheric mass and velocity of the meteoroid, its fragmentation during the atmospheric entry and to compare the resulting strewn field with the observed one.

10:20 a.m.

Riches L. J. *   Pickersgill A. E.   Daly L.

Shock Metamorphism in Feldspar from the Chicxulub Impact Structure [#6158]
This project investigates shock deformation features in both plagioclase and alkali feldspar from the Chicxulub impact structure. Samples have been mapped using SEM-EDS and will be studied further using EBSD.

10:30 a.m.

Kurosawa K. *   Ono H.   Niihara T.   Mikouchi T.   Sakaiya T.   Kondo T.   Tomioka N.   Genda H.   Tada T.   Tada R.   Kayama M.   Koike M.   Sano Y.   Matsuzaki T.   Murayama M.   Satake W.   Okamoto T.   Matsui T.

Shock Recovery of Macro Blocks of Rocky Materials with Decaying Shock Waves [#6163]
We have developed an experimental technique for shock recovery with decaying compressive pulses. The method allows as to collect a shocked sample experienced a variety of peak pressure depending on the initial location only at a single shot.

10:40 a.m.

Bender Koch C. *

Sampling of Impact Plume Components from Wabar Impact Craters [#6220]
It is suggested to use information from analysis of the material inside plume-trapping vesicles as a proxy for the conditions in the impact plume.

10:50 a.m.

Gritsevich M. *   Moilanen J.   Visuri J.   Heinlein D.   Schweidler F.   Flohrer J.   Oberst J.

Reanalysis of the 24 November 1970 Fireball [#6216]
We demonstrate that the EN241170 fireball was the fall of the Ischgl meteorite.

11:00 a.m.

 

Q&A

 

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Tuesday, August 17, 2021

MARS

1:30 p.m.   Williford ABC

Chairs:  Amanda Ostwald and Arya Udry

Times

Authors (*Denotes Presenter)

Abstract Title and Summary

1:30 p.m.

Ostwald A. M. *   Udry A.   Gross J.   Day J. M. D.

Nakhlite and Chassignite Parental Melt Compositions Compared [#6209]
We present and compare major, minor, and trace element abundances present in nakhlite and chassignite parental melt compositions determined from melt inclusion analysis.

1:45 p.m.

Humayun M. *   Yang S.   Irving A. J.   Righter K.

An Ancient Martian Ocean Inferred from Sulfide Immiscibility in Meteorites [#6243]
Elemental abundances in two Amazonian-age meteorites indicate that the depleted shergottites formed in a large volcanic pile, the basal flows of which were sulfidized in an ancient martian ocean.

PRE-RECORDED PRESENTATION

2:00 p.m.

Christou E. V. *   Hallis L. J.   Daly L.   Hayward C. L.   Lee M. R.

Northwest Africa 8159 Apatite Versus Lafayette Apatite:  Effects of Terrestrial Weathering Versus Martian Alteration [#6297]
We have analyzed NWA 8159 and Lafayette apatite via correlative SEM, EPMA, TEM and APT to acquire an insight into their origin and the geochemical reaction pathways of the primary and secondary alteration processes that affected these Martian rocks.

2:10 p.m.

Piercy J. D.   Bridges J. C. *   Hicks L. J.

Odinite and Saponite Replacement of Carbonate in the Lafayette Nakhlite:  Part of the CO2-CH4 Cycle on Mars [#6159]
Textural and chemical analysis of Lafayette carbonate dissolution illustrate a process of subsurface dissolution to explain the low abundance of detected carbonate on Mars and a source of martian methane.

2:20 p.m.

Griffin S. *   Keller T.   Daly L.   Lee M. R.   Cohen B. E.   Forman L. V.   Piazolo S.   Trimby P. W.   Baumgartner R.   Benedix G. K.

Nakhlite Emplacement Mechanisms from Electron Backscatter Diffraction [#6185]
Volcano on Mars / Emplaced nakhlites now on Earth / How did they all form?

2:30 p.m.

Malarewicz V. *   Beyssac O.   Zanda B.   Hewins R.   Pont S.   Bouley S.

Investigating Main and Accessory Minerals in the Martian Regolith Breccia Northwest Africa 7533 by Raman and Luminescence Spectroscopy [#6128]
As a martian breccia, Northwest Africa 7533 provides insights on the history and evolution of the primitiv crust. In this study, we used Raman and luminescence spectroscopy to investigate the structure and REE content of main and accessory minerals.

2:40 p.m.

 

Q&A

3:40 p.m.

 

Q&A continued

 

Tuesday, August 17, 2021

PRESOLAR GRAINS

1:30 p.m.   Waldorf

Chairs:  Nan Liu and Reto Trappitsch

Times

Authors (*Denotes Presenter)

Abstract Title and Summary

1:30 p.m.

Liu N. *   Ogliore R. C.

NanoSIMS Isotopic Investigation of the CO3 Chondrite Dominion Range 14359 [#6069]
We report our NanoSIMS H, C, and O isotopic imaging results for the CO3 chondrite DOM 14359. We compare DOM 14359 with DOM 08006 for their inventories of presolar and interstellar grains to discuss their different degrees of secondary processing.

1:45 p.m.

Liu N. *   Dauphas N.   Cristallo S.   Ogliore R. C.

Oxygen and Magnesium-Aluminum Isotopic Systematics of Presolar Nanospinel Grains from CI Chondrite Orgueil [#6215]
We report NanoSIMS O isotope data for 109 new presolar oxides and Al-Mg isotope data for 24 of the grains (23 spinel grains and one Al-rich oxide), including four Group 2 and 20 Group 1 grains.

2:00 p.m.

Seifert L. B. *   Haenecour P.   Ramprasad T.   Zega T. J.

Transmission Electron Microscopy Study of a Presolar Silicate Grain from the Uniquely Altered Miller Range 07687 Chondrite [#6124]
We report the structure and chemistry of a presolar silicate grain from the Miller Range 07687 carbonaceous chondrite.

2:15 p.m.

Stephan T. *   Bloom H. E.   Davis A. M.   Hoppe P.   Korsmeyer J. M.   Pellin M. J.   Regula A.   Sheu S.

Correlated Molybdenum and Ruthenium Isotopes in Presolar Silicon Carbide [#6270]
Mo and Ru isotopes analyzed with high precision in presolar SiC grains using CHILI show a clear correlation between s-process signatures in Mo and Ru. Contributions by the s-process to the various Ru isotopes were determined for the first time.

2:30 p.m.

Barosch J. *   Nittler L. R.   Dobricǎ E.   Brearley A. J.   Hezel D. C.   Alexander C. M. O’D.

Presolar O- and C-Anomalous Grains in Pristine Ordinary Chondrite Matrices [#6137]
We used the NanoSIMS to investigate the abundances, compositions and characteristics of presolar O- and C-anomalous grains in pristine matrices of unequilibrated ordinary chondrites.

2:45 p.m.

Trappitsch R. *   Ong W.-J.   Dory C. J.   Shulaker D. Z.   Lugaro M.   Savina M. R.   Weber P. K.   Isselhardt B. H.   Amari S.

Simultaneous Analyses of Titanium and Molybdenum Isotopic Compositions in Presolar SiC Grains [#6239]
Simultaneous analyses of titanium and molybdenum in presolar SiC mainstream grains allow us to correlate galactic chemical evolution and s-process nucleosynthesis.

3:00 p.m.

Meyer B. S. *   Bermingham K. R.

Titanium-46 Production in Exploding White Dwarf Stars [#6274]
Correlated 46Ti and 50Ti anomalies in Solar System objects are thought to arise from selective thermal processing of distinct carriers. We speculate they could also arise from dust from rare thermonuclear supernovae that carries both isotopes.

PRE-RECORDED PRESENTATION

3:15 p.m.

Hoppe P. *   Leitner J.

The Imprint of Supernova Dust in the Solar Nebula [#6148]
We review abundances of presolar supernova grains in primitive meteorites and discuss implications for the inventory of interstellar dust in the solar nebula.

3:25 p.m.

Bodénan J.-D. *   Hutchison M.   Mayer L.   Schönbächler M.

Nucleosynthetic Variations Generated by Size and Density Driven Sorting of Dust in Protoplanetary Disk [#6180]
We use smoothed particle hydrodynamics simulations to study the density and mass sorting of dust, especially presolar grains in a protoplanetary disk to assess its effects on their distribution and nucleosynthetic variations in solar system material.

3:35 p.m.

Shaw K. M. M. *   Coath C. D.   Elliott T.

Evidence for Presolar Titanium in Silicate Stardust [#6102]
Using in situ techniques, we have identified highly anomalous material in the ungrouped carbonaceous chondrite Acfer 094 that possesses a high Si-O and low C bulk composition. Possible evidence for presolar Ti in silicate phases.

3:45 p.m.

Singerling S. A. *   Nittler L. R.   Barosch J.   Dobricǎ E.   Brearley A. J.   Stroud R. M.

Transmission Electron Microscopy of an AOA-Like Presolar Grain from Semarkona [#6029]
We detail TEM microstructural and chemical observations of an unusual AOA-like presolar grain from Semarkona with implications for circumstellar conditions around its progenitor AGB star as well as secondary processes on its asteroidal parent body.

3:55 p.m.

 

Q&A

 

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Tuesday, August 17, 2021

POSTER SESSION:  ACHONDRITES

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Kouvatsis I.   Cartwright J. A.

Investigating the Impact Flux of the Early Solar System Through the Analysis of HEDs and Mesosiderites [#6208]
Mesosiderites / Eucrites to investigate / Solar system flux.

Regula A.   Bloom H. E.   Dauphas N.   Davis A. M.   Korsmeyer J. M.   Krawczynski M. J.   Pellin M. J.   Sheu S.   Stephan T.

Toward Trace Element Concentrations with CHILI [#6287]
CHILI, a RIMS instrument at the University of Chicago, offers yet untapped capabilities for trace element ratio measurements on the micrometer scale. Toward this goal, we present Ru/Mo measurements from several well-characterized iron meteorites.

Valdes M. C.   Blättler C. L.   Razionale D.   Heck P. R.

A Reevaluation of the Petrogenetic Relationships Among HED Meteorites with Calcium Isotopes [#6268]
To shed light on Vesta’s magmatic history and investigate the nature of HED relationships, we aim to quantify the effects of differentiation processes such as partial melting and fractional crystallization on Ca isotopes.

Anand A.   Pape J.   Mezger K.   Hofmann B.

Cr and O Isotopes Link IVA Irons and LL Chondrites [#6154]
Investigation of the association between IVA irons and L/LL ordinary chondrites within ε54Cr vs. Δ17O space based on ε54Cr values obtained from chromite (FeCr2O4) or daubréelite (FeCr2S4) inclusions in IVA iron meteorites.

Sheikh D.

Petrology and Geochemistry of Errachidia 004, a Polymict Winonaite Composed of Distinct High and Low Metal Lithologies [#6253]
Errachidia 004 is a recently recovered polymict winonaite from Morocco in 2020 that exhibits two distinct lithologies with varying metal abundances:  1) a metal-depleted ultramafic melt residue and 2) a silicate-rich IAB of basaltic composition.

 

Tuesday, August 17, 2021

POSTER SESSION:  CARBONACEOUS CHONDRITES

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Aravena-Gonzalez C. S.   Moncada D.   Martínes de Los Ríos R.

A Detail Petrographic of Two CO3 Chondrites from Atacama Desert, Chile [#6138]
Petrological, chemical and mineralogical study of Melt Inclusions Assemblages (MIAs) found mainly in olivine crystals present in El Médano 389 and El Médano 397, CO3 Chondrites. Using Raman spectroscopy, IR and Laser Ablation ICP-MS.

Kerraouch I.   Bischoff A.   Zolensky M. E.   Hellmann J. L.   Wölfer E.   King A. J.   Patzek M.   Marrocchi Y.   Pack A.   Ludwig T.   Trieloff M.

The Metal-Rich Lithology Within the Aguas Zarcas Breccia:  Characterization, Origin, and Evolution [#6201]
We investigated the petrography, mineralogy, chemistry, and isotopic composition of an unusual ‘metal-rich lithology’ (termed Met-1) from the CM chondrite Aguas Zarcas in order to better understand its characteristics, affinities, origin, and formation history.

 

Tuesday, August 17, 2021

POSTER SESSION:  CURATION AND EDUCATION

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Heck P. R.   Holstein J.

A Brief History of the Meteorite Collection at the Field Museum [#6222]
The Field Museum started with a meteorite collection in 1894, the year it was established. It currently houses the largest meteorite collection at a private scientific research institution. We will present the collection’s history and current status.

Chennaoui Aoudjehane H.   Berrada O.   Aoudjehane M.   Arif S.   Jadid F. Z.   Boukhris S.   Zennouri L.   Ould Mohamed Naviee E. C.   El Hachemi E.   Shisseh T.   Haissen F.   Makhoukhi S.

Attarik Foundation:  Two Years of Meteoritics and Planetary Science Dissemination [#6265]
ATTARIK Foundation is an autonomous and non profit NGO dedicated to the promotion of meteoritics and planetary sciences, a summary of two years of rich activities will be presented.

Anghel S.   Chirita D.   Cretu M.   Mihalcea I.   Moldovan R.   Naiman M.   Soare A.   Stancu C.   Stoica A.

Astrojunior:  An Educational Project for Interactive Teaching of Planetary Science [#6028]
The full implementation of an online planetary science interactive workshop for children all ages.

Hill P. J. A.   Chevalier M.   Herd C. D. K.   Hilts R. W.

Advancing the Curation of Aldehydes and Ketones for Applications to Carbonaceous Chondrite Curation and Cometary Nucleus Sample Return [#6119]
The aim of this study is to examine the reactivity of carbonyl compounds under a variety of conditions to provide insight into the curation and handling requirements of organic-rich astromaterials.

Bruno A.

An Archival and Oral History of the Tunguska Explosion [#6178]
This poster presentation will describe the research and results of a book project by a professional historian on the history of investigations into the Tunguska explosion of 1908 in Siberia.

 

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Tuesday, August 17, 2021

POSTER SESSION:  ENSTATITE AND ORDINARY CHONDRITES

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Dobricǎ E.   Ohtaki K. K.   Breadley J.

TEM/EELS Detection of Water in Extremely Dry Phosphates from Ordinary Chondrites [#6081]
This study suggests that electron energy-loss spectroscopy is a useful tool for detecting tens of ppm-level water on a scale of a few microns.

Downes H.   Goodrich C. A.   Greenwood R. C.   Abernethy F. J.

Origin of Enstatite Chondrite Fragments in Almahata Sitta:  Implications for the Enstatite Chondrite Parent Body [#6089]
Almahata Sitta contains as wide a range of enstatite chondrite fragments as found in meteorite collections on Earth. Is the parent body for enstatite chondrites a mega-breccia containing all known enstatite chondrite types?

Ivanova M. A.   Zinovieva N. G.   Franchi I. A.   Lorenz C. A.   Teplyakova S. N.

Ungrouped Chondrite Chug-Chug 086 [#6108]
A new ungrouped chondrite Chug-Chug 086 has affinities with reduced chondrites EM 301, NWA 7135 and Acfer 370, although, in general, its oxygen isotopic composition, average chondrule size and Co content in kamacite are in the range of H chondrites.

Ostrowski D. R.

Compression Strength of Ordinary Chondrites [#6126]
The compression strength for Tamdakht and other ordinary chondrites is measured. Compression test elastic modulus is compared to the moduli determined from acoustic velocity.

Chennaoui Aoudjehane H.   Agee C. B.   Jadid F. Z.

Wad Lahteyba H5 Moroccan Fall of June 27th,2019 [#6245]
Wad Lahteyba is an H5 eye witnessed Moroccan fall that we will be describing in the presentation.

Chennaoui Aoudjehane H.   Agee C. B.   Bouragaa A.   Jadid F. Z.

Al Farciya LL6 Moroccan Fall of August 20th, 2019 [#6249]
Al Farciya is an LL6 fall that occurred in the south of Morocco on August 2019, we will be presenting the fall circumstances and the classification of the meteorite.

 

Tuesday, August 17, 2021

POSTER SESSION:  EARLY SOLAR SYSTEM: DISK CONDITIONS AND PROCESSES

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Desch S. J.   Mane P.   Dunham E. T.   Williams C. D.

Oxygen Isotope Reservoirs in the Solar Nebula [#6244]
Our astrophysical model combining magnetic forces on dust during star formation and pebble flux in the disk, reproduces the oxygen isotopic compositions and oxygen fugacities of CAIs, explaining why the Sun is at D17O=–29 but CAIs at D17O=–23.

Burbine T. H.   Greenwood R. C.

Investigating the Origin of Oxygen Isotopic Variations in Meteorites [#6210]
We are currently undertaking modeling to investigate how the oxygen isotopic variations seen in meteorites can be related to mixtures of simple end-member nebula components.

Di Y.   Sapah M. S.   Amelin Y.

Complex Pb Isotopic Contamination in CAIs from Northwest Africa 4502 [#6033]
Pb isotopic systems of CAIs from NWA 4502 CV chondrite show strong and complex terrestrial contamination signatures. The Pb contamination in CAIs is difficult to completely remove by acid leaching, and requires a more effective cleaning procedure.

 

Tuesday, August 17, 2021

POSTER SESSION:  SPACE WEATHERING

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Thompson M. S.   Dukes C. A.   Loeffler M. J.   Morris R. V.   Glotch T. G.   Keller L. P.

Revealing the Combined Effects of Simulated Solar Wind Irradiation and Micrometeoroid Bombardment of a Carbonaceous Chondrite [#6289]
We perform coordinated analysis of a carbonaceous chondrite that has been subjected to laboratory experiments simulating micrometeoroid bombardment and solar wind irradiation.

Chaves L. C.   Thompson M. S.   Prince B.   Loeffler M. J.

Simulating Micrometeoroid Impacts on Magnetite:  Implications for Remote Sensing Observations and Returned Sample Analysis [#6298]
Here we present the results of pulsed laser irradiation experiments on magnetite pressed pellets.

Kling A. M.   Benner M. C.   Thompson M. S.   Greer J.   Diaz R. E.   Heck P. R.

The Search for Water in Lunar Soils Through Coordinated Analysis of Space Weathering Characteristics in an Apollo 17 Sample [#6241]
Hollow nanophase iron particles were identified in a vesicle-rich region of the space weathered rim in a mature lunar mare grain. Coordinated analyses may shed light on the relationship between vesicles, water, and the hollow nanoparticles.

 

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Tuesday, August 17, 2021

POSTER SESSION:  IMPACTS

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Anghel S.   Nedelcu D. A.   Birlan M.   Boaca I.   Colas F.   Malgoyre A.   MOROI and FRIPON Teams

Phase Two of MOROI Network:  Connection with FRIPON and Pipeline Development for Studying Meteoroids [#6027]
The current capability of the MOROI network, its expansion, and the gradual integration with the FRIPON international database. Moving towards a complete pipeline to track the atmospheric impacts, from source origin, to strewn field computation.

Clarke J. C.   Cartwright J. A.   Stowell H. H.   Tobin T. S.

Exploration of the K-Pg Impactor Through a Study of Tektites from the Gulf Coastal Plain [#6277]
The Chicxulub impactor is believed to be the impactor responsible for the end of the Cretaceous period and extinction of non-avian dinosaurs. The purpose of this study is to conclude the parent body of the impactor using neodymium analysis.

 

Tuesday, August 17, 2021

POSTER SESSION:  MARS AND MOON

5:30 p.m.   

Authors (*Denotes Presenter)

Abstract Title and Summary

Bechtold A.   Schulz T.   Wegner W.   Mader D.   Patterer C.   Koeberl C.

Geochemistry of Lunar Regolith Breccia Northwest Africa 11962 and Its Potential Source Region/Crater in the Procellarum KREEP Terrane [#6250]
We describe a possible source region on the Moon for lunar meteorite NWA 11962 from geochemical data.

Bhanot K. K.   Downes H.

Multiple Origins of Spinel Symplectite Textures in Lunar Dunites 72415 and 72417 [#6090]
CT scanning of lunar dunites reveals four different types of spinel symplectite. Each type has a different origin, with spinel-pyroxene clusters being formed after mantle garnet, and others formed by interaction with melts at different depths.

Wilbur Z. E.   Barnes J. J.   Eckley S. A.   Zeigler R. A.

Investigating the Petrogenesis and Eruption Histories of Apollo 15 and Apollo 17 Basalts [#6130]
Apollo basalts/Contain vesicles and vugs/How were they emplaced?

 

Tuesday, August 17, 2021

POSTER SESSION:  MISSIONS

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Keller L. P.   Berger E. L.

Solar Energetic Particle Tracks in Itokawa Samples:  Implications for Regolith Development on Near-Earth Asteroids and Space Weathering [#6111]
We use solar energetic particle tracks in Itokawa grains to infer surface exposure ages, space weathering rates, and regolith dynamics.

Yokochi R.   Mueller P.   Heck P. R.   Campbell A.

Development of Stepwise Heating Gas Extraction System for the Analyses of Noble Gases in Mission-Returned Samples [#6196]
Aiming at better resolving different noble gas components in mission-returned samples, a laser-based stepwise heating gas extraction system was developed. The temperature stability and accuracy of the heating system will be reported at the meeting.

MSPG2 Team   Beaty D. W.   Carrier B. L.   Kminek G.   Meyer M. A.   Haltigin T.   Hays L. E.   Agee C. B.   Busemann H.   Cavalazzi B.   Cockell C. S.   Debaille V.   Glavin D. P.   Grady M. M.   Hauber E.   Hutzler A.   Marty B.   McCubbin F. M.   Pratt L. M.   Regberg A. B.   Smith A. L.   Smith C. L.   Summons R. E.   Swindle T. D.   Tait K. T.   Tosca N. J.   Udry A.   Usui T.   Velbel M. A.   Wadhwa M.   Westall F.   Zorzano M.-P.

Summary of Mars Sample Return (MSR) Science Planning Group 2:  Planning for the Arrival and Analysis of MSR Samples at Earth [#6242]
MSPG2’s overarching aims were to build upon previous efforts in defining an end-to-end MSR Science Program, and addressing important issues that will influence the design and implementation of the Sample Receiving Facility.

 

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Tuesday, August 17, 2021

POSTER SESSION:  MICROMETEORITES

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Boyd M. R.   Cartwright J. A.   Singh J.   Bagot P. A. J.   Moody M. P.

Nanoscale Chemical Heterogeneity in an Antarctic Micrometeorite Revealed by Atom Probe Tomography [#6278]
We analysed a micrometeorite using atom probe tomography, spatially resolving geochemical trends on the nanometre-scale. We identify heterogeneous elemental distributions that may represent atmospheric entry processing.

 

Tuesday, August 17, 2021

POSTER SESSION:  CHONDRULES AND CAIS

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Hutson M. H.   Ruzicka A. M.   Pugh R. N.

Harold (a) and Harold (b):  Two New Meteorites from Ness County, Kansas [#6064]
Classification of two new L6 chondrites from Ness County Kansas demonstrates lack of literature data needed for pairing, and suggests that more than the roughly three dozen currently catalogued stones were picked up in the late 1800s.

Dunham E. T.   Desch S. J.   Torrano Z. A.   Mane P.   Williams C. D.

A Reassessment of Aluminum-26 in FUN CAIs [#6273]
The FUN CAIs / 26-Aluminum / Uniform or not?

 

Tuesday, August 17, 2021

POSTER SESSION:  EXPERIMENTS

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Liu C. X.   Heard A. W.   Yokochi R.   Dauphas N.

MERLIN — An Innovative Experimental Leaching System for Mars and Beyond [#6260]
We introduce MERLIN, an instrument designed to carry out experimental leaching to simulate aqueous alteration under controlled atmosphere on planetary bodies, using the production of clay on early Mars as an example.

Ouzillou M.   Herd C. D. K.

Does Meteoritic Metal Change with Forging? An Experimental Study [#6187]
A study to determine the bulk elemental changes that occur in the meteorite Gebel Kamil during subsequent stages of forging, and the implications in linking artifacts, such as Tutankhamun’s dagger, created from meteoritic iron to a known meteorite.

Kalabanov S. A.   Korotishkin D. V.   Ishmuratov R. A.   Valiullin F.   Sherstykov O. N.

New Software and Hardware Platform for Meteor Radar Observation in Kazan (Russia) [#6017]
The Kazan Meteor Radar (KMR) is a new generation system deployed on the scientific research area of Kazan Federal University, Tatarstan, Russia (55 N) in March 2015. KMR transmits 15kW power in pulse and uses single antenna all sky configuration.

 

Thursday, August 19, 2021

POSTER SESSION:  SMALL BODIES

5:30 p.m.  

Authors (*Denotes Presenter)

Abstract Title and Summary

Vodniza A. Q.

The Asteroid Apophis [#6007]
I took part in the international research team “99942 Apophis 2021 Observing Campaign.” I captured several images and videos of the asteroid Apophis, and I calculated the orbital elements and physical parameters.

Safronova V. S.   Kuznetsov E. D.

Estimation of the Age of Two Young Pairs of Asteroids [#6144]
The age of the pair (87887) 2000 SS286 – (415992) 2002 AT49 ranges from 7.58 ± 0.035 to 8.8 ± 0.043 kyr; for the pair (320025) 2007 DT76 – (489464) 2007 DP16 one ranges from 15.4 ± 0.96 to 29.5 ± 0.04 kyr depends on the semimajor axis Yarkovsky drift.

 

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Thursday, August 19, 2021

CARBONACEOUS CHONDRITES

8:30 a.m.   Williford ABC

Chairs:  Romy Hanna and Kaitlyn McCain

Times

Authors (*Denotes Presenter)

Abstract Title and Summary

8:30 a.m.

Yang X. *   Hanna R. D.   Davis A. M.   Neander A. I.   Heck P. R.

A Possible Record of an Active Asteroid:  Discovery of a Compact Lithology in the Aguas Zarcas CM Chondrite [#6075]
We found a previously unreported lithology of compact fragments in the Aguas Zarcas chondrite, which would advance our understanding of the regolith evolution of carbonaceous chondrites and the potential prevalence of active asteroids.

8:45 a.m.

Hanna R. D. *   Ketcham R. A.   Edey D.

3D Porosity of Fine-Grained Rims in CM Murchison via XCT Imaging with Xe Gas [#6219]
We examine microporosity within CM Murchison in 3D using X-ray CT imaging while the sample is infiltrated with the noble gas Xe, which is highly attenuating to X-rays.

9:00 a.m.

Nie N. X. *   Chen X.-Y.   Hopp T.   Hu J. Y.   Zhang Z. J.   Teng F.-Z.   Shahar A.   Dauphas N.

A Condensation Origin of Potassium and Rubidium Isotopic Variations in Carbonaceous Chondrites [#6217]
Rubidium and potassium isotopes suggest evaporation and partial condensation of them into chondrules is the main cause of Rb and K depletion and isotopic variation in carbonaceous chondrites.

9:15 a.m.

Zega T. J. *   Schrader D. L.

Microstructural Analysis of a Sulfide Grain in the Matrix of the Sutter’s Mill CM-Like Carbonaceous Chondrite [#6280]
We report on the microstructure of a sulfide grain the Sutter’s Mill CM-like carbonaceous chondrite. In situ alteration, presumably on the parent body, altered and oxidized its microstructure, leading to the formation of magnetite.

9:30 a.m.

McCain K. A. *   Liu M-C.   Brearley A. J.   McKeegan K. D.

Matrix-Matched 53Mn-53Cr Ages of Dolomite and Calcite in CM and CI Chondrites [#6263]
We present measurements of the 53Mn-53Cr ages of carbonates in the CM and CI chondrites Boriskino, ALH 84034, and Alais made using matrix-matched dolomite standards.

9:45 a.m.

Chennaoui Aoudjehane H. *   Agee C. B.   Ziegler K.   Garvie L. A. J.   Irving A.   Sheikh D.   Carpenter P. K.   Zolensky M.   Schmitt-Kopplin P.   Trif L.

Tarda an Unusual Carbonaceous Chondrite Meteorite Fall from Morocco [#6303]
Tarda is an C2-Ungrouped new carbonaceous chondrite fall in Morocco, analysis supporting the specificity and unicity of this meteorite will be given in the presentation. Tarda is a perfect analog material for the space missions to the C-type meteorites.

PRE-RECORDED PRESENTATION

10:00 a.m.

Ogliore R. C. *   Carpenter P.   Wang A.   Krawczynski M.   Vacher L.

Iron-Titanium Sulfide and Phosphide Spherules in Acfer 182 (CH3) [#6143]
An iron-titanium sulfide object and phosphide spherules in Acfer 182 provide evidence that CH chondrites accreted impact-liberated debris from reduced parent bodies.

10:10 a.m.

Leitner J. *   Vollmer C.   Kodolányi J.   Hoppe P.

Investigation of the Silicon Nitride Inventory of Carbonaceous Chondrites [#6183]
N-isotopic compositions of Silicon nitride from three carbonaceous chondrites indicate formation at larger heliocentric distances than Si3N4 from E-chondrites (ECs), while Isheyevo-Si3N4 is isotopically light and occurs in EC-like assemblages.

10:20 a.m.

Arribard Y. *   Baklouti D.   Lantz C.   Aléon-Toppani A.   Borondics F.   Djouadi Z.   Doisneau B.   Nakamura T.   Sandt C.   Brunetto R.

Variations of Mineralogy, Hydration and Organic Content Within CM Chondrites Determined by MIR Hyperspectral Imaging [#6149]
MIR reflectance hyperspectral imaging measurements and data process including k-means clustering allow us to characterize and colocalize at the micrometric scale the mineralogy, hydration and organic content on millimetric surfaces of chondrites.

10:30 a.m.

Dionnet Z. *   Aléon-Toppani A.   Rubino S.   Suttle M. D.   Lantz C.   Grieco F.   Baklouti D.   Djouadi Z.   Rotundi A.   Scheel M.   Borondics F.   Heripre E.   Avdellidou C.   Brunetto R.

FTIR Spectroscopy and X-CT Characterization of the New CM Aguas Zarcas [#6099]
We report the result of X-CT and FTIR spectroscopy measurements on fragments from the new CM Aguas Zarcas (AZ). We discuss the porosity, the role of hydrated minerals in the evolution of organic matter and compare AZ with other CM chondrites.

10:40 a.m.

Bose M. *   Hahn T. M. Jr.   Jin Z.

Silicate Minerals in CM Carbonaceous Chondrites Murchison and Aguas Zarcas [#6078]
Silicate minerals in Aguas Zarcas has elevated hydrogen isotopic ratios compared to Murchison. Isolated olivines in the Murchison matrix have higher D/H ratios but similar water contents relative to Murchison chondrules.

10:50 a.m.

Ciceri F. *   Hildebrand A. R.   Hanton L. T. J.