The first samples from Almahata Sitta showing contacts between ureilitic and chondritic lithologies: Implications for the structure and composition of asteroid 2008 TC 3
| Autor: | Marc Fries, Robert J. Macke, Victoria E. Hamilton, Muawia H. Shaddad, D. Kent Ross, Michael E. Zolensky, Edward D. Young, Henner Busemann, I. E. Kohl, Peter Jenniskens, Noriko T. Kita, A. M. Fioretti, M. E. I. Riebe, Hilary Downes, C. A. Goodrich, Takahiro Hiroi |
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| Rok vydání: | 2019 |
| Předmět: |
Almahata Sitta
Olivine Materials science Mineralogy Chondrule Ureilite engineering.material ureilite 010502 geochemistry & geophysics 01 natural sciences Article Geophysics Meteorite Space and Planetary Science Chondrite 0103 physical sciences Pigeonite engineering asteroid 2008 TC3 Plagioclase structure chondrite 010303 astronomy & astrophysics Achondrite 0105 earth and related environmental sciences |
| Zdroj: | Meteoritics & planetary science (2019). doi:10.1111/maps.13390 info:cnr-pdr/source/autori:Goodrich, Cyrena Anne; Zolensky, Michael E.; Fioretti, Anna Maria; Shaddad, Muawia H.; Downes, Hilary; Hiroi, Takahiro; Kohl, Issaku; Young, Edward D.; Kita, Noriko T.; Hamilton, Victoria E.; Riebe, My E., I; Busemann, Henner; Macke, Robert J.; Fries, M.; Ross, D. Kent; Jenniskens, Peter/titolo:The first samples from Almahata Sitta showing contacts between ureilitic and chondritic lithologies: Implications for the structure and composition of asteroid 2008 TC3/doi:10.1111%2Fmaps.13390/rivista:Meteoritics & planetary science/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume Meteorit Planet Sci |
| ISSN: | 1945-5100 1086-9379 |
| Popis: | Almahata Sitta (AhS), an anomalous polymict ureilite, is the first meteorite observed to originate from a spectrally classified asteroid (2008 TC(3)). However, correlating properties of the meteorite with those of the asteroid is not straightforward because the AhS stones are diverse types. Of those studied prior to this work, 70–80% are ureilites (achondrites) and 20–30% are various types of chondrites. Asteroid 2008 TC(3) was a heterogeneous breccia that disintegrated in the atmosphere, with its clasts landing on Earth as individual stones and most of its mass lost. We describe AhS 91A and AhS 671, which are the first AhS stones to show contacts between ureilitic and chondritic materials and provide direct information about the structure and composition of asteroid 2008 TC(3). AhS 91A and AhS 671 are friable breccias, consisting of a C1 lithology that encloses rounded to angular clasts ( |
| Databáze: | OpenAIRE |
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