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Northwest Africa 11648 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11648 This is an OFFICIAL meteorite name. Abbreviation: NWA 11648 Observed fall: No Year found: 2002 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 12583 approved meteorites (plus 8 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 29 Jan 2018 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 107:
Northwest Africa 11648 (NWA 11648) (Northwest Africa) Purchased: 2002 Feb Classification: Ordinary chondrite (L6) History: A single stone was purchased by Edwin Thompson at the Tucson Gem Show and donated to Cascadia. Petrography: About a dozen readily identifiable chondrules are visible in thin section, but their edges grade into surrounding granular regions. Approximately 2% metal present. Minimal weathering. Shock stage (conventional) estimated from olivine deformation; plagioclase deformed. Geochemistry: (A. Ruzicka and K. Farley, Cascadia) Olivine (Fa 24.9±0.2, N=13), low-Ca pyroxene (Wo 1.5±0.3 Fs21.1±0.2En77.4±0.2, N=12), plagioclase (Ab 85.1±0.6Or3.2±0.4An11.4±0.8, N=13). Classification: L6 chondrite based on texture and mineral chemistry. Specimens: Cascadia holds the main mass and type specimen, consisting of 28.7 g in two pieces plus one thin section. | ||||||||||||||||||||||||||||||
Data from: MB107 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) Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |