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Northwest Africa 15640 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15640 This is an OFFICIAL meteorite name. Abbreviation: NWA 15640 Observed fall: No Year found: 2021 Country: Algeria Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 19 approved meteorites classified as L/LL5. [show all] Search for other: L chondrites, L/LL chondrites, L/LL chondrites (type 4-7), LL chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||
Comments: | Approved 29 Jan 2023 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 112:
Northwest Africa 15640 (NWA 15640) Algeria Find: April 2021 Classification: Ordinary chondrite (L/LL5) History: Purchased by Youssef Benani from Salek Zeini in Tindouf, Algeria. Physical characteristics: Single stone with dark brown fusion crust. Petrography: (D. Sheikh, Cascadia; A. Love, App) Specimen is an equilibrated chondrite containing secondary recrystallized feldspar (Av. ~43 μm, n=50) and accessory Fe-Ni metal, troilite, chromite, and merrillite. Geochemistry: (A. Love, App) Olivine (Fa27.0±0.4, n=12), Low-Ca Pyroxene (Fs21.6±0.4Wo1.3±0.2, n=12). Classification: Ordinary Chondrite (L/LL5). Specimens: 21.4 g at Cascadia, main mass with Youssef Benani. | ||||||||||||||||||||||||||||
Data from: MB112 Table 0 Line 0: |
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Institutions and collections |
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011) App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Geography:![]() |
Statistics: This is 1 of 1315 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) |