Li, Shijie; Leya, Ingo; Wang, Shijie; Smith, Thomas; Bao, Huiming; Fan, Yan; Mo, Bing (2021). Exposure history, petrology, and shock‐induced sulfidization reaction of Alatage Mountain 001 strewn field samples. Meteoritics & planetary science, 56(7), pp. 1293-1310. Meteoritical Society at the University of Arkansas, Dept. of Chemistry and Biochemistry 10.1111/maps.13710
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Exposure_history__petrology__and_shock_induced_sulfidization_reaction_of_Alatage_Mountain_001_strewn_field_samples.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (8MB) |
Several hundred meteorites with a total mass of over 100 kg were collected as theAlatage Mountain (AM) strewn field located in the Kumtag desert, Xinjiang Province,China. Twelve AM meteorites were studied in this work. Petrography, mineralogy, bulkchemistry, bulk oxygen isotopic compositions, and light noble gas concentrations andisotopic compositions were determined for all or for a selection of the meteorites. Thestudied meteorites are L-chondrites that suffered a very strong impact; impact melt veinsand melt pockets are widely distributed. More than 50% of the troilite exists in the form ofblebs and veins in olivine and pyroxene. Some of these meteorites are impact meltrecrystallized rocks (e.g., AM 037). The strong impact caused the decomposition of troilite,which led in AM 034 to the sulfidization reaction of olivine. The metal in most meteorites isalmost completely altered, and the troilite has been significantly oxidized. Weatheringresulted in the depletion of Mg, Fe, Co, and Ni, and the enrichment of Sr, Ba, Pb, and U inthese meteorites. The cosmic ray exposure (CRE) ages measured for these specimens rangebetween 6.2 ±1.9 Ma and 9.0 ± 2.7 Ma, depending on the cosmogenic nuclide used. Theaverage CRE age is 7.6 ±1.3 Ma. Both4He and40Ar gas retention ages indicate that thestrong impact which caused the shock effects occurred about 320 Ma ago.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute 08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences |
UniBE Contributor: |
Leya, Ingo |
Subjects: |
500 Science > 530 Physics 500 Science > 520 Astronomy 600 Technology > 620 Engineering |
ISSN: |
1086-9379 |
Publisher: |
Meteoritical Society at the University of Arkansas, Dept. of Chemistry and Biochemistry |
Language: |
English |
Submitter: |
Dora Ursula Zimmerer |
Date Deposited: |
28 Mar 2022 12:10 |
Last Modified: |
05 Dec 2022 16:16 |
Publisher DOI: |
10.1111/maps.13710 |
BORIS DOI: |
10.48350/167781 |
URI: |
https://boris.unibe.ch/id/eprint/167781 |
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