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Northwest Africa 10208 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10208 This is an OFFICIAL meteorite name. Abbreviation: NWA 10208 Observed fall: No Year found: 2015 Country: (Northwest Africa) Mass: 400 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 645 approved meteorites (plus 1 unapproved name) classified as CO3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 18 Jul 2015 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 104:
Northwest Africa 10208 (NWA 10208) (Northwest Aftica) Purchased: 2015 Classification: Carbonaceous chondrite (CO3) History: Purchased by Adam Aaronson in Morocco, 2015. Physical characteristics: Weathered exterior. A saw cut reveals very small chondrules in a very fine-grained, dark brown groundmass. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous chondrules with apparent mean diameter 200±175 μm, n=40. Fine-grained matrix makes up about 40% of this meteorite. Kamacite, taenite, troilite, iron oxide, and phosphate were detected. Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa24.6±15.4, Fe/Mn=97±39, Cr2O3=0.15±0.18 (wt%), n=30; low-Ca pyroxene Fs2.5±0.9Wo2.1±1.9, Fe/Mn=27±13, n=13. Classification: Carbonaceous chondrite (CO3), subtype estimated between 3.0 and 3.2 based on Cr2O3 content of ferroan olivine, however the 1-sigma value of 0.18 is significantly higher than the trend for CO chondrites in figure 15 of Grossman and Brearley (2005). Specimens: 20.1 g including a probe mount on deposit at UNM; Aaronson holds the main mass | ||||||||||||||||||||||||||||||
Bibliography: |
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Data from: MB104 Table 0 Line 0: |
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Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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