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Northwest Africa 10388 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10388 This is an OFFICIAL meteorite name. Abbreviation: NWA 10388 Observed fall: No Year found: 2010 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 455 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 10 Dec 2015 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 104:
Northwest Africa 10388 (NWA 10388) (Northwest Africa) Purchased: 2010 Feb Classification: HED achondrite (Diogenite) History: Purchased by Dr. David Gregory in February 2010 from a Moroccan dealer at the Tucson Gem and Mineral Show. Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen composed predominantly of interleaved, bladed grains of orthopyroxene (72.2 vol.%) and calcic plagioclase (25.1 vol.%) exhibiting strong lattice preferred orientation. Some larger (up to 4 mm), equant grains of orthopyroxene are also present. Accessory minerals are olivine, Ti-bearing chromite, Ti-free and Al-bearing chromite, rare silica polymorph and troilite. Geochemistry: Orthopyroxene (cores Fs22.3-24.9Wo1.8-3.0; rims Fs30.9-34.9Wo4.1-3.2; FeO/MnO = 29-33; N = 4), olivine (Fa33.7-37.0, FeO/MnO = 43-47, N = 2), olivine inclusion in large orthopyroxene grain (Fa26.7, FeO/MnO = 39), plagioclase (An85.9-88.0Or0.1-0.3, N = 3). Classification: Diogenite (noritic). The plagioclase abundance (25 vol%) is anomalous for a diogenite. Specimens: 26.71 g including one polished thin section at ROM; remainder with DGregory. | ||||||||||||||||||||||||||||||
Data from: MB104 Table 0 Line 0: |
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Institutions and collections |
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (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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Photos: |
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Geography: |
Statistics: This is 1 of 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names) |