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Presolar Grains, Cosmic Dust, and Comet Wild 2

Tuesday, March 14, 2023, 2:15 PM
Waterway Ballroom 6

Nan Liu
Brad Meyer
Kaitlyn McCain
2:15 PM
Session Introduction
2:20 PM
Meyer B. S.* Bermingham K. R.
Galactic Chemical Evolution of NRLEE Dust [#2762]
Chemical evolution modeling shows dust from NRLEEs is likely a small component in the early solar system but carries huge anomalies in 48Ca, 50Ti, and 54Cr.
2:30 PM
Pal I.* Jadhav M. Shulaker D. Z. Savina M. R.
Heavy Element Isotopic Analysis of Low Density Graphite Grains with LION [#2904]
Supernova dust / Hold p, r, and n signals / Found in graphite grains.
2:40 PM
Liu N.* Alexander C. M. O'D. Nittler L. R. Wang J.
Late Formation of Silicon Carbide in Supernova Remnants Confirmed by New Vanadium-Titanium Isotope Data [#2496]
We report NanoSIMS Ti-V isotope data for 10 new X grains. The new data support the late formation of SiC dust in supernova remnants.
2:50 PM
Barosch J.* Nittler L. R. Wang J. Davidson J. Alexander C. M. O'D.
Mg-Isotopic Composition of O-Rich Presolar Grains in Unequilibrated Ordinary and Carbonaceous Chondrites [#2582]
We used the NanoSIMS to measure the Mg and Si isotopic compositions of O-rich presolar grains in primitive ordinary and carbonaceous chondrites.
3:00 PM
Panel Q&A
3:20 PM
Takigawa A.* Hirai K. Tachibana S.
Circumstellar Dust Around Alumina-Rich AGB Stars: Condensation Experiments in the Ca-Al-Si-O and Ca-Al-Si-Fe-O Systems [#2136]
Systematic condensation experiments in the Ca-Al-Si-Fe-O system constrained the chemical composition of circumstellar dust around alumina-rich AGB stars.
3:30 PM
Nevill N. D.* Bland P. A. Saxey D. W. Rickard W. D. A. Guagliardo P. et al.
Quantative Measurements of Trace Elements and Three-Dimensional Atomic Scale Characterisation of Presolar O-rich Oxides and Silicates: An Atom Probe Tomography Approach [#1707]
We present detailed geochemistry and 3D spatially accurate reconstructions of atoms measured within the analysis volume of presolar oxide and silicate grains.
3:40 PM
Nguyen A. N.* Keller L. P. Brownlee D. E. Joswiak D. J.
Mineralogy of Presolar Grains of Varied Stellar Origins in Giant Cluster IDP U2-20GCA [#2535]
We find giant cluster IDP U2-20GCA to contain abundant presolar grains and report the mineralogy of nova, supernova and AGB grains.
3:50 PM
Smith L. R.* Haenecour P. Barnes J. Domanik K. Neuman M. et al.
Abundance of Presolar Grains in the C3.00-Ungrouped Chondrite Chwichiya 002 [#2425]
Chwichiya 002 is a C3.00-ungrouped chondrite with presolar grain abundances similar to the ones in the most primitive carbonaceous chondrites.
4:00 PM
Panel Q&A
4:20 PM
Bradley J. P.* Ishii H. A. Joswiak D. J. Brownlee D. E. Ohtaki K.
GEMS are not Precursors of Hydrated Layer Silicates in IDPs or "GEMS-like" Matrices in Chondrites [#1615]
We find that GEMS are not precursors of the layer silicates in hydrated IDPs, or the “GEMS-like” material and layer silicates in carbonaceous chondrite matrices.
4:30 PM
Joswiak D. J.* Brownlee D. E. Nguyen A. N. Hahn T. M. Nakamura T. et al.
Ryugu-Like Phyllosilicate Clast from a Giant Cluster IDP of Probable Cometary Origin: Evidence for Material Exchange Between Asteroidal and Cometary Regions [#2272]
Ryugu-like saponite clast from a giant cluster IDP of probable cometary origin provides evidence for material exchange between asteroidal and cometary regions.
4:40 PM
Rojas J.* Alexander C. M. O'D. Nittler L. R. Wang J. Duprat J. et al.
Investigation of the Carbonaceous Matter in Ultracarbonaceous and Fine Grained Antarctic Micrometeorites [#1605]
We present N and C isotopic data on C-rich phases in ultra-carbonaceous and fine-grained micrometeorites. Anomalous N and C isotopic composition are reported.
4:50 PM
Zhang M.* Brownlee D. E. Joswiak D. J. Kita N. T.
Rocky Fragments in the Largest Track of Comet 81P/Wild 2–Chondrule Debris Formed in the Icy Outer Solar System? [#1711]
Mineralogical and oxygen isotopic signatures of many chondrule-like fragments in T227 suggest a possible chondrule formation event in the icy outer solar system.
5:00 PM
Panel Q&A
5:20 PM
Session Closure