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Northwest Africa 15367 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15367 This is an OFFICIAL meteorite name. Abbreviation: NWA 15367 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 24 approved meteorites classified as Lunar (melt breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||
Comments: | Approved 4 Dec 2022 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 111:
Northwest Africa 15367 (NWA 15367) (Northwest Africa) Find: Nov 2021 Classification: Lunar meteorite (melt breccia) History: Edwin Thompson gave a 28.4 g slice to Cascadia for classification with the following information: A single 2238 g mass was found in Nov. 2021 in or near Bassikounou, Mauritania. Physical characteristics: Physical Characteristics: Gray, cream, and white colored clasts set in a dark gray/black background are visible on the cut face of the slice received by Cascadia, with a rough alignment of elongate clasts. The largest clast in the slice (~1.5 cm × 0.7 cm) is light gray and contains both white and dark gray/black sub-clasts. Petrography: (M. Hutson, A. Ruzicka, D. Sheikh, Cascadia): Sample is a melt breccia consisting of sub-angular to sub-rounded lithic and mineral clasts set in a glassy matrix. Lithic clast lithologies identified in the sample are primarily highland lithologies and include: anorthosites, anorthositic troctolites, gabbroic anorthosites, and noritic anorthosites (Stoffler et al., 1980). Accessory phases include Cr-spinel and ilmenite. Geochemistry: (M. Hutson, D. Sheikh, A. Ruzicka, Cascadia; P. Carpenter, WUSL): Average of all data: Plagioclase feldspar: Ab3.6±0.9Or0.4±0.2An96.0±0.9, N=131; Olivine: Fa32.6±7.1, Fe/Mn=94.7±8.8, N=39; Low-Ca pyroxene: Fs26.6±8.2Wo3.6±0.7, Fe/Mn=57.0±3.9, N=29; Pigeonite: Fs30.9±5.8Wo9.3±2.9, N=34; Augite: Fs14.1±5.1Wo39.6±2.9, N=27. Classification: Lunar (melt breccia). This meteorite is best described as a lunar feldspathic melt breccia based on texture and chemistry. Specimens: Cascadia holds 25.7 g in five pieces, as well as a polished thin section and material in an epoxy butt; Thompson 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) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 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. 111, in preparation (2022)
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |