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Chondritic Components 1
Friday, August 2, 2024, 10:45 AM
Albert II Auditorium
Chairs:
Yves Marrocchi
Denton Ebel
Denton Ebel
10:45 AM
Inada S.*
Hama T.
Tachibana S.
Theory of Kinetic Isotope Fractionation During Evaporation
[#6128]
We developed a new theory to describe kinetic isotope fractionation during evaporation. Our theory can explain magnitudes of the fractionation measured by experiments, which are often smaller than the conventional theoretical predictions.
We developed a new theory to describe kinetic isotope fractionation during evaporation. Our theory can explain magnitudes of the fractionation measured by experiments, which are often smaller than the conventional theoretical predictions.
11:00 AM
Ghaznavi P.*
Burkhardt C.
Tissot F. L. H.
Leya I.
Exploring Pre-Accretionary Irradiation Effects in CAIs from the CV3 Chondrite Allende
[#6346]
Studied cosmic ray effects in CAIs from Allende. Found cosmogenic signals in He, Ne, Ar, and Kr isotopes, suggesting similar irradiation histories. Results favor CAI outward transport in an expanding disk over X-wind models.
Studied cosmic ray effects in CAIs from Allende. Found cosmogenic signals in He, Ne, Ar, and Kr isotopes, suggesting similar irradiation histories. Results favor CAI outward transport in an expanding disk over X-wind models.
11:15 AM
Ma C.*
Borriello R.
Xiong F.
Lorenzon S.
Mugnaioli E.
et al.
Discovery of New Mineral Jianmuite, ZrTi4+Ti3+5Al3O16, in the Allende Meteorite: An Ultrarefractory Phase from the Solar Nebula
[#6039]
Nanomineralogy of Allende / 20 new minerals discovered since 2007 / Jianmuite, the latest new mineral.
Nanomineralogy of Allende / 20 new minerals discovered since 2007 / Jianmuite, the latest new mineral.
11:30 AM
Tsuruoka Y.*
Tachibana S.
Evaporation-Induced Formation of Melilite Mantle of Type B CAI: Experimental Study
[#6242]
The evaporation and crystallization experiments of 5–6 mm-sized CAI analog melt were conducted. The similarity in the zoning profiles of the melilite mantles in natural type B1 CAIs and CAI analogs suggests their formation induced by evaporation.
The evaporation and crystallization experiments of 5–6 mm-sized CAI analog melt were conducted. The similarity in the zoning profiles of the melilite mantles in natural type B1 CAIs and CAI analogs suggests their formation induced by evaporation.
11:45 AM
Krot A. N.*
Nagashima K.
Dunn T. L.
Corundum-Bearing CAIs from CK3 Chondrites: Fluid-Assisted Thermal Metamorphism Disturbed O and Al-Mg Isotope Systematics of Primary Minerals
[#6047]
Corundum, melilite, and perovskite in CK3 CAIs experienced O-isotope exchange with aqueous fluid. Al-Mg isotope systematics of corundum and melilite, but not hibonite, were disturbed.
Corundum, melilite, and perovskite in CK3 CAIs experienced O-isotope exchange with aqueous fluid. Al-Mg isotope systematics of corundum and melilite, but not hibonite, were disturbed.
12:00 PM
Ebel D. S.*
Gemma M. E.
Weisberg M. K.
Friedrich J. M.
Bennu and the H-L-LL Trend: Lost and Found?
[#6463]
Loss of mixtures of primitive metal-cored olivine-rimmed nodules and refractory nodules found in Acfer 094 and other CCs and on Bennu may explain multiple subchondritic elemental abundances and heavy oxygen in reservoirs forming ordinary chondrites.
Loss of mixtures of primitive metal-cored olivine-rimmed nodules and refractory nodules found in Acfer 094 and other CCs and on Bennu may explain multiple subchondritic elemental abundances and heavy oxygen in reservoirs forming ordinary chondrites.
*presenter
