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Northwest Africa 15441 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15441 This is an OFFICIAL meteorite name. Abbreviation: NWA 15441 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 469 approved meteorites classified as LL3. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||
Comments: | Approved 12 Nov 2022 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 111:
Northwest Africa 15441 (NWA 15441) (Northwest Africa) Purchased: Aug 2020 Classification: Ordinary chondrite (LL3) History: Two stones (132 and 71 g) were purchased by Mr. Jasper Spencer from a Moroccan dealer in August 2020 via Facebook Messenger. Petrography: (M. Hutson, A. Ruzicka, Cascadia): Two thin sections were prepared and examined. In thin section, the sample is composed of crisply-defined chondrules, partial chondrules and lithic fragments set in a fragmental matrix. The apparent mean chondrule diameter is 0.9 mm (N=13). Weathering is variable, ranging from about 40% replacement on one side of one thin section to complete replacement on the other side; the second section is more uniform with about 60% replacement, putting this stone at the W2/W3 boundary. Metal abundance (including associated iron hydroxide produced by weathering) in thin section comprises ~2 area%. Geochemistry: Olivine is unequilibrated with Fa4.8-40.5, average Fa31.6±9.6, N=42. Low-Ca pyroxene is unequilibrated with Fs0.7-30.0; average Fs15.3±8.4Wo1.3±1.1, N=44. Classification: Ordinary chondrite (LL3) based on chemistry, texture, average chondrule size, and metal/troilite abundance. Specimens: Cascadia holds 26.3 g in one piece, as well as two polished thin sections and material in two epoxy butts; Mr. Jasper Spencer holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB111 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |