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| Northwest Africa 10191 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 10191 This is an OFFICIAL meteorite name. Abbreviation: NWA 10191 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass:  4.26 kg | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 3 approved meteorites classified as C3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), and Ungrouped chondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 30 Jun 2015 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 104:
Northwest Africa 10191 (NWA 10191) (Northwest Africa) Purchased: 2014 Classification: Carbonaceous chondrite (C3) History: Purchased by Darryl Pitt over the period May 2014 to March 2015 from the same dealer in Erfoud, Morocco (and reportedly found at the same site as NWA 8418). Physical characteristics: A group of nine uncrusted stones (total weight 4262 g) of very similar appearance. All contain visible metal and sporadic, relatively large, round CAI rimmed by chlorapatite. Petrography: (A. Irving and S. Kuehner, UWS) A sample from each stone was analyzed by optical petrographic and electron microprobe techniques applied to thin sections or polished slices. All specimens are relatively fresh and composed of small to large (apparent diameter 0.15-3.9 mm), separated granular chondrules in a finer grained metal-bearing matrix. Chlorapatite occurs patchily throughout the matrix of every specimen. Large (up to 5.5 mm), coarse grained CAI composed of olivine, Al-Ti-diopside, spinel and ilmenite occur sporadically, and are rimmed by chlorapatite; much finer-grained CAI with the same mineral assemblage are also present in some specimens. Geochemistry: Olivine (Fa0.4-37.6, FeO/MnO = 108-135, N = 7), orthopyroxene (Fs0.9-19.3Wo0.9-1.5, N = 3), augite (Fs6.7-7.8Wo48.7-47.3, N = 2). Classification: Carbonaceous chondrite (C3) with affinities to CV3 chondrites. The abundance of apatite in this specimen is an anomalous feature for carbonaceous chondrites. This and the presence of large rimmed CAI establish that these stones are paired with the NWA 8418 stone found at the same site. Specimens: 65.4 g including four polished thin sections and six polished slices or endcuts at UWB. The remaining material is held by DPitt. | ||||||||||||||||||||||||||||||
| Data from: MB104 Table 0 Line 0: |
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| Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address) |
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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) | ||||||||||||||||||||||||||||||
| Crosslinks: |
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| Also see: |
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| Revision history: |
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