Meeting Planning Services

8:30 AM

Le Bellego B.* Motto-Ros V. Luais B. Dalou C. Condamine P.

Deciphering Metal-Silicate Fractionation During Planetesimal Formation Using High-Resolution Ge Imaging with LIBS in HT-HP Experiments [#6379]
We quantify Ge metal-silicate partitioning during core-mantle segregation using high-res LIBS imaging on HT-HP experiments. Results show time-dependent Ge diffusion at the m-s interface and in the FeNi metal emphasizing applications on extraterrestrial samples.

8:45 AM

Timoner C.* Zhu D. Zhao R. Zhang B. Bouvier A.

Asteroidal Anorthosites: Tracking Protoplanetary Crust Formation in the Early Solar System [#6133]
Two anorthosite meteorites, WZ001 and NWA15118, show oxygen isotopes linked to HEDs. Based on mineral trace elements and in situ Rb-Sr isotopes (Neoma MC-ICP-MS/MS) we suggest these fractionated rocks are paired and genetically close to diogenites.

9:00 AM

Cartier C.* Llado L. Pirotte H. Tissandier L. Namur O. et al.

Tracing Planetary Differentiation Pressure and Oxygen Fugacity Conditions Using Ni and Co Metal/Silicate Partitioning: Application to the Achondrite Parent Bodies [#6263]
New Ni and Co met/sil Ds used to build a model tracing planetary differentiation conditions. Achondrite data indicate a wide variety of parent bodies, from the asteroid-sized, oxidized angrite PB to the planet-sized, highly reduced aubrite PB.

9:15 AM

Condamine P.* Bouhifd A. Luais B. Devidal J. L. Perrichon L. et al.

Unravelling the Conditions Prevailing During Earth’s Core-Mantle Differentiation: Experimental Insight from Germanium Partitioning [#6449]
We performed high pressure (1–20 GPa) and high temperature (1600°–2200°C) experiments to better understand the behavior of germanium, a moderately volatile and siderophile element that is poorly understood so far.

9:30 AM

Hu S.* Anand M. Franchi I. A. Zhao X. Zhang B. et al.

Water-Rich Phosphate from the Unbrecciated Basaltic Eucrite Northwest Africa 15965 [#6027]
An additional hydrous mineral, water-rich phosphate, likely whitlockite, was reported in an unbrecciated basaltic eucrite NWA 15965.

9:45 AM

Bell A. S.* Pinkham L. A. Shearer C. K. Irving A. J.

Reassessing the Carbonated Partial Melting Hypothesis with New Magmatic Redox Estimates for Olivine Phenocrysts in Primitive Angrites [#6074]
Using new redox data coupled with thermodynamic modeling of carbonate stability in angritic phase assemblages, we critically evaluate the carbonated melting hypothesis as an explanation for the origin of angritic magmas.

10:00 AM

Zhu K.* Yamaguchi A. Elliott T.

Chondritic Ni Isotope Compositions of Angrite Parent Body and Implications for Planetary Evaporation [#6280]
Meral in plutonic angrites represent the Ni budget for core and also bulk APB. Chondritic Ni isotopes of APB suggest evaporation does not fractionate isotopes of Fe, Si, and Mg that have volatility similar to Ni.

10:15 AM

Gray M. L.* Weisberg M. K. Jaret S. J. Ebel D. S.

Contact Metamorphism as Potential Mechanism for EH6 Chondrite Formation [#6046]
Northwest Africa (NWA) 7976 and NWA 12945 are two EH6 chondrites with few shock characteristics, potentially formed as a result of contact metamorphism due to heat derived by impact melt sheets on the EH parent body.

10:30 AM

Bouvier A.* Obengo E. Reger P. M. Neumann W. Schwarz W. H. et al.

Accretion and Thermal History of the Angrite Parent Body [#6210]
We investigated the mineral compositions, textures, and U-Pb geochronology of Ca-(silico)phosphates in NWA 8535, NWA 10463, and NWA 12004 angrites. We combine new and literature data to constrain a numerical thermal model for the angrite parent body.

10:45 AM

Anand A.* Piralla M. Hopp T. Burkhardt C. Hezel D. et al.

53Mn-53Cr Evidence for Early Impact Disruption of Magmatic Iron Meteorite Parent Bodies [#6298]
A ~3.7 Ma Mn-Cr age of the formation of silicate inclusions from the Aletai iron meteorite indicates rapid crystallization and cooling of the core, most likely facilitated by collisional stripping of the mantle and exposure of the still molten core.

11:00 AM

Dickens D.* Bell A. S.

Oldhamite Bearing Sulfides in a New Ungrouped Achondrite [#6440]
The enstatite chondrites, aubrites, and NWA 15915 show chemical and isotopic similarities. They are unique in having FeO free pyroxenes, and are the only meteorites to contain the exotic sulfide oldhamite, which also occurs on the surface of Mercury.

11:15 AM

Perez L.* Danoix F. Roskosz M. Gounelle M.

New Insights on the Formation of IAB-Complex Iron Meteorite: The Case of IAB-ung El-Medano 300 and Northwest Africa-8155 [#6129]
A study of two IAB-ung El-Medano 300 and NWA-8155 reveals an origin within two distinct metallic pools, with different thermal histories. El-Medano 300 experienced two impacts, with a faster cooling process than NWA-8155, which underwent only one.

11:30 AM

Vacher L. G.* Eschrig J. Bonal L. Fujiya W. Flandinet L. et al.

Effects of Thermal Metamorphism on the Hydrogen, Carbon, and Nitrogen Budgets of Ordinary Chondrite Parent Bodies [#6433]
We analyzed the bulk H, C, and N concentrations and isotopic compositions of various falls and Antarctic UOCs with varying metamorphic grades. Our goal was to investigate the impact of thermal metamorphism on the volatile budget of ordinary chondrites.

11:45 AM

Mayne R. G.* Garcia S. L. McCoy T. J. Corrigan C. M. Gardner-Vandy K. et al.

Enon and Puente del Zacate: A One-Body Problem [#6237]
IIIAB iron / And chondritic silicates / Trapped melt or impact?

12:00 PM

Rider-Stokes B. G.* Jackson S. L. Burbine T. H. White L. F. Greenwood R. C. et al.

Searching for the Long Lost Angrite Parent Body [#6323]
Spectral analysis of all sub-groups of angrites and their relation to the asteroid (354) Eleonora.