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Chondrites 3: Mainly Non-Carbonaceous Chondrites
Thursday, August 1, 2024, 10:00 AM
Albert II Auditorium
Chairs:
Agata Krzesinska
EL MEHDI EL HACHIMI
EL MEHDI EL HACHIMI
10:00 AM
Krzesinska A. M.*
Tyminski Z.
Allen N. M.
Busemann H.
Maden C.
et al.
Collisional History of L Chondrite Antonin Inferred from K-Ar, U, Th-He and Phosphate U-Pb Dating
[#6168]
Collisional history of Antonin — an L chondrite with a known heliocentric orbit — is reconstructed through U-Pb dating of apatite, K-Ar, and U,Th-He gas retention age and CRE analysis. Antonin experienced collision at ~4.45 Ga and a milder one at ~240 Ma.
Collisional history of Antonin — an L chondrite with a known heliocentric orbit — is reconstructed through U-Pb dating of apatite, K-Ar, and U,Th-He gas retention age and CRE analysis. Antonin experienced collision at ~4.45 Ga and a milder one at ~240 Ma.
10:15 AM
Faison T. J'N.*
Ash R. D.
Effects of Oxygen Fugacity on Element Distribution in Ordinary Chondrite Metal
[#6058]
How does oxygen fugacity affect siderophile element distribution in metamorphosed H, L, and LL OCs? H6 metal patterns are equilibrated and flat, but L6 and LL6 samples are not. Metal averages in oxidized samples show depletions in W, Mo, and Fe.
How does oxygen fugacity affect siderophile element distribution in metamorphosed H, L, and LL OCs? H6 metal patterns are equilibrated and flat, but L6 and LL6 samples are not. Metal averages in oxidized samples show depletions in W, Mo, and Fe.
10:30 AM
Charnoz S.*
Aléon J.
Chaussidon M.
Sossi P.
Marrocchi Y.
Non-Equilibrium Condensation of the Solar Nebula: Forming the Mineralogical Precursors of Chondrites
[#6065]
We simulate numerically the fast condensation of a solar-nebula gas. We find that a diverse range of minerals are formed (including oxidized phases and phyllosilicates) mirroring mineralogies observed in chondrites. Kinetic processes are important.
We simulate numerically the fast condensation of a solar-nebula gas. We find that a diverse range of minerals are formed (including oxidized phases and phyllosilicates) mirroring mineralogies observed in chondrites. Kinetic processes are important.
10:45 AM
Xiang J. W.
Jin Z.*
Trace Element Systematics in Unequilibrated Ordinary Chondrites
[#6117]
Concentrations of 53 trace elements were measured in situ from chondrule minerals, chondrule metastasis, and chondrite matrix by LAICPMS.
Concentrations of 53 trace elements were measured in situ from chondrule minerals, chondrule metastasis, and chondrite matrix by LAICPMS.
11:00 AM
Mc Ardle P.*
Burgess R.
Jones R. H.
Clay P. L.
Tartèse R.
et al.
Bulk and In Situ Ar-Ar Dating of Enstatite Chondrites
[#6130]
We dated enstatite chondrites using bulk Ar-Ar. Ages varied from parent body formation through to impact reset. We also measured in situ dates of EH3. The Qingzhen Reaction (QR) appears to be responsible for age resetting in QR bearing EH3.
We dated enstatite chondrites using bulk Ar-Ar. Ages varied from parent body formation through to impact reset. We also measured in situ dates of EH3. The Qingzhen Reaction (QR) appears to be responsible for age resetting in QR bearing EH3.
11:15 AM
Schrader D. L.*
Davidson J.
On the Trail of Chondrule Precursors and 'Forbidden Triangle' Olivine from Unequilibrated Ordinary Chondrites
[#6350]
We discuss preliminary data for relict grains in unequilibrated ordinary chondrites to constrain the origins of chondrule precursors and rare "forbidden triangle" olivine, and investigate grain migration in the early solar system.
We discuss preliminary data for relict grains in unequilibrated ordinary chondrites to constrain the origins of chondrule precursors and rare "forbidden triangle" olivine, and investigate grain migration in the early solar system.
11:30 AM
Murphy K. T.*
Fehr M. A.
Rüfenacht M.
Schönbächler M.
The Nucleosynthetic Ti and Zr Isotope Composition of Aubrites and Enstatite Chondrites
[#6095]
Enstatite chondrites and aubrites are analyzed for their Ti and Zr isotope composition to further understand and constrain estate meteorite parent bodies.
Enstatite chondrites and aubrites are analyzed for their Ti and Zr isotope composition to further understand and constrain estate meteorite parent bodies.
11:45 AM
Huang Y.*
Pickard H.
Martins R.
Morton E. M.
Jaffe C. S.
et al.
Isotopic Variations of Zn and Cd in Non-Carbonaceous Chondrites — Insights into Parent Body Processes
[#6293]
A large set of ordinary chondrites and enstatite chondrites were analyzed for their Zn and Cd concentrations and isotope compositions to elucidate the origin of their volatile element depletion and gain insight into chondrite parent body processes.
A large set of ordinary chondrites and enstatite chondrites were analyzed for their Zn and Cd concentrations and isotope compositions to elucidate the origin of their volatile element depletion and gain insight into chondrite parent body processes.
12:00 PM
El Hachimi EL.*
Chennaoui Aoudjehane H.
Russell S.
Petrographical, Mineralogical, and Geochemical Study of the Meteorite Gueltat Zemmour Morocco, Observed Fall in August 2018
[#6234]
Gueltat Zemmour is a very fresh new L4 fall. Petrological observations align with those of similar meteorites, except for the larger mean size of chondrules. The lack of halite implies that this phase is not a ubiquitous component of chondrites.
Gueltat Zemmour is a very fresh new L4 fall. Petrological observations align with those of similar meteorites, except for the larger mean size of chondrules. The lack of halite implies that this phase is not a ubiquitous component of chondrites.
*presenter
