Program with Links to Abstracts

Herbst W.* Greenwood J. P.

An Astrophysical Site for Chondrule Formation [#1209]
We propose that chondrules form during the accretion of primitive planetesimal fragments to differentiated planetesimals.

Arakawa S.* Yamamoto D. Ushikubo T. Kaneko H. Tanaka H. et al.

A Model of Oxygen Isotope Exchange Between Molten Silicate Spherules and Ambient Water Vapor with Nonzero Relative Velocity [#1565]
We found that large mass-dependent fractionation would be caused by isotope exchange with ambient vapor unless the relative velocity is sufficiently small.

Mahajan R. R.*

Krypton and Xenon Isotopes in Individual Chondrules of Parsa (EH3) and Chainpur (LL3.4) Chondrites [#1012]
Kr and Xe isotopic ratios in individual chondrules from Parsa and Chainpur is discussed.

Wang Z. L.* Tian W. Wang W.

Ungrouped Achondrite Northwest Africa 13272/13351 is a Chondrite Melt Breccia Composed of L4 and L7 Materials [#1021]
NWA 13272/13351 is composed of L4 and L7 materials, which are formed by large-scale impact heating or endogenous magmatism on the L chondrite parent body.

Rapoza M. C.* Parman S. W.

Early Inner Solar System Conditions Recorded in New Meteorite Northwest African (NWA) 14756 — CANCELED [#2674]
A geochemical analysis of an ordinary chondrite with low alteration reveals the primary minerals in its chondrules are magnesium-rich olivine and pyroxene.

Lavrentjeva Z. A.* Lyul A. Yu.

Distribution of Trace Elements in Grain-Sized Fractions from Atlanta EL6 Equilibrated Enstatite Chondrite [#1009]
This work reports data on the composition of separated grain-sized fractions on the Atlanta EL6 equilibrated enstatite chondrite.

Mc Ardle P.* Jones R. H. Tartèse R. Burgess R. Clay P. L. et al.

A Multi-System Approach to Understanding the Chronology of Enstatite Chondrites [#1189]
We are conducting a correlated halogen and multi-system chronology analysis of type 3 ECs, using in situ methods.

Haenecour P.* Smith L. R. Neuman M. Koefoed P. Wang K. et al.

Major and Trace Element Composition of Carbonaceous Chondrites: Insight into Their Alteration Histories [#1825]
We report new data on the bulk abundance of major and trace elements in a series of carbonaceous chondrite falls and finds from different petrologic types.

Goodrich C. A.* Lee S. Mane P. Hamilton V. E. Zolensky M. E. et al.

Ryugu and the Quest for Unaltered CI-Like Materials from the Early Solar System [#1446]
Anhydrous silicates and Ca,Al-rich phases in Ryugu are remnants of CI3 material. We are studying xenoliths from polymict ureilites that show similar features.

Moggi Cecchi V.* Ibhi A. Nachit H. Pratesi G. Senesi G. S.

A New Carbonaceous Chondrite from the Es Smara Region, Western Sahara: Compositional and Textural Data [#2859]
Compositional and textural data of a new CV3 OxB carbonaceous chondrite recovered in the Es Smara region of Western Sahara are provided.

Garvie L. A. J.*

Powder X-ray Diffraction of CM1/2 and CM2 Carbonaceous Chondrite Falls [#2274]
Powder XRD shows that CM1/2 and CM2 chondrite falls have very similar bulk mineralogies.

Ogiya K.* Mikouchi T. Zolensky M. E.

Carbonate Mineralogy of the C1 Clasts in Kaidun Meteorite [#1948]
The carbonate analysis shows that some of the C1 clasts in Kaidun meteorite are unique materials not bound by the existing framework of CI and CM chondrites.

Ushikubo T.* Yamaguchi A. Weisberg M. K. Kimura M. Ebel D. S.

Evidence for High d13C and D17O Fluid in Small Bodies Accreted in a Cold and Distant Region from the Sun [#1907]
The d13C and D17O systematics of carbonates in CM, CR, and Tagish Lake chondrites suggest existence of higher d13C and D17O ices in a distant region from the Sun.

Northrup P.* Tappero R. V. Glotch T. D. Yesiltas M. Kebukawa Y.

Non-Invasive Analysis of Chemistry in Ryugu Grains by Synchrotron X-ray Microprobes: Pink-Beam CT and Tender-Energy XAS [#3035]
Non-invasive X-ray techniques, pink beam CT, and tender-energy absorption spectroscopy elucidate grain-scale chemistry and redox in small grains from Ryugu.

Seret A.* Guigoz V. Rotella H. Vennéguès P. Libourel G. et al.

High Temperature Annealing of Amorphous Mg2SiO4 Films and Their Bearing on the Formation of Amoeboid Olivine Aggregates. [#1648]
To explore possible mechanisms for the formation of amoeboid olivine aggregates, we performed high-temperature annealings of amorphous Mg2SiO4 films.

Shornikov S. I.* Yakovlev O. I.

Mass Spectrometric Study of Evaporation of Natural CAIs Melts (Types A and B) in Efremovka Chondrite [#1983]
We present experimental results on the evaporation of the main types of CAIs (A and B) of natural origin.

Mouti Al-Hashimi X.* Mane P. Setera J. B. Simon J. I.

Trace Elemental Abundances in Calcium-Aluminum-Rich Inclusions in CV Chondrites [#2925]
Solar system birth / Rare Earth elements galore / What does it all mean?

Rabbi M. F.* Hamza M. H. Garvie L. A. J. Cotto-Figueroa D. Asphaug E. et al.

Investigation of Mechanical Properties of the Viñales (L6) Ordinary Chondrite [#2583]
Meteorites contain useful information for estimating the physical and mechanical properties of asteroids. The information is critical in planetary defense.

Hoffmann V. H.* Kaliwoda M. Junge M. Hentschel F. Schmahl W. W.

High Resolution Micro Raman Spectroscopy on the Winchcombe Carbonaceous Chondrite (CM2) [#2308]
Within this project, the phase composition of Winchcombe (CM2) samples is investigated by 2D/3D digital microscopy and micro Raman spectroscopy.

Garvie L. A. J.* Hoover C. G.

Specific Surface Area and Pore-Size Distribution in Carbonaceous Chondrites [#2258]
N2 gas provides data on surface area and micropore sizes in meteorites.

Szurgot M. A.*

Modal Composition of Braunschweig Chondrite [#1088]
Modal composition of the Braunschweig meteorite was determined and the bulk composition, mean atomic weight, and grain density were verified.

Anand A.* Mezger K.

53Mn-53Cr Chronology of Ordinary Chondrites Dergoan (H5) and Kamargaon (L6) [#1045]
The 53Mn-53Cr chronology of Dergaon (H5) chondrite yields an age of 14.4 Ma after CAIs. The 53Cr/52Cr was equilibrated in Kamargaon (L6) after 53Mn had decayed.

Verma K. S.* Rai N. Marhas K. K.

Early Formed Solids in the Solar System: Shock Metamorphism, Thermal Impact History, and Chondrule Diversity of the Dergaon H5 Ordinary Chondrite [#2218]
A comprehensive investigation of the textural variation in chondrules, shock induced features of H5 Dergaon ordinary chondrite, including geochemical analysis.

Lyons J. R.*

A Molecular Cloud Origin for N Isotope Enrichments in the Solar System, and Implications for Enantiomeric Excess in Amino Acids [#2340]
15N enrichment in the solar system derives from N2 self-shielding in the parent cloud, and is consistent with formation of enantiomeric excess in amino acids.