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Northwest Africa 13570 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13570 This is an OFFICIAL meteorite name. Abbreviation: NWA 13570 Observed fall: No Year found: 2014 Country: Morocco Mass: 23.7 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 236 approved meteorites classified as Eucrite-br. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 12 Dec 2020 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13570 (NWA 13570) Morocco Purchased: 2014 Classification: HED achondrite (Eucrite, brecciated) History: Sergey Vasiliev and Marc Jost purchase the 23.7g specimen from a meteorite dealer while at the 2014 Ensisheim meteorite show. Physical characteristics: Sample is an ovoid-shaped fragment with a glossy, black, flow-lined fusion crust coating ~ 60% of the specimen. Areas not coated with fusion crust are light orange in color. The cut face of the sample shows a light-colored granular breccia. Petrography: Description and classification (A. Love, App) Sample is a cataclastic breccia composed of (vol%): 400-1700µm mineral and lithic fragments of exsolved pyroxene (50), plagioclase (49) and opaques. Lithic fragments have cumulate textures. Sample also contains pyroxene-rimmed silica objects. Additional minerals are silica polymorph, chromite, ilmenite and apatite. Geochemistry: (A. Love, App) low-Ca pyroxene (Fs39.7±1.0Wo4.9±1.4, Mg#58.3±0.6, Fe/Mn=29.0±0.8, n=8); high-Ca pyroxene (Fs13.1±0.8Wo33.5±2.4, Fe/Mn=22.1±0.6, n=5) and plagioclase (An95.0±0.5Or0.1±0.0, n=8). Classification: (HED achondrite) monomict eucrite breccia M-S2, low weathering. Based on textures and mineral compositions, sample is a brecciated cumulate eucrite. Specimens: Sergey Vasiliev and Marc Jost (SJS) hold the main mass. A 4.8g slice and polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) SJS: Space Jewels Switzerland, 2555 Brügg, Switzerland (private address; updated 3 Jan 2010) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 2068 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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