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Northwest Africa 12941 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12941 This is an OFFICIAL meteorite name. Abbreviation: NWA 12941 Observed fall: No Year found: 2012 Country: Morocco Mass: 218 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 2 May 2020 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 12941 (NWA 12941) Morocco Purchased: 2012 Classification: HED achondrite (Eucrite) History: Purchased from A. Aaronson in 2012 at the Tucson Gem and Mineral Show, who provided origin of sample as being from Morocco. Catalogued at the Royal Ontario Museum collection as sample LM58149 Physical characteristics: The meteorite has a weathered, fractured fusion crust on two surfaces, with cracks and an exposed interior faces covered with caliche. Interior of the sample largely light-grey in colour with larger black clasts visible. No shock veins observed. Petrography: Breccia composed of clasts set in a matrix dominated by large crystal fragments. The majority of the clasts are composed of previously brecciated material. They contain crystal fragments and small gabbroic textured clasts set in a finely comminuted matrix. Mineral grains in both matrix and clasts show undulatory extinction. Geochemistry: Mineral composition and geochemistry: Plagioclase composition: An90.01±2.34 (n=27) Low Ca-pyroxene composition: Fs43.66±14.83Wo4.90±3.19 and FeO/MnO = 30.06±1.98 (n=24). Classification: (K. Tait, ROM) Texture and compositions suggest the sample is a polymict eucrite breccia. Lack of clear Opx-dominated composition excludes the possibility of this meteorite being a howardite. | ||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (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) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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