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Northwest Africa 7051 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7051 This is an OFFICIAL meteorite name. Abbreviation: NWA 7051 Observed fall: No Year found: 2011 Country: Morocco Mass: 1201 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 7051 (NWA 7051) Morocco Purchased: 2011 Classification: HED achondrite (Eucrite) History: Purchased from A. Aaronson in 2011 at the Tucson Gem and Mineral Show, who provided origin of sample as being from Morocco. Catalogued in the Royal Ontario Museum collection as LM55991 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: Monomict breccia composed of clasts with a gabbroic texture. In most areas of the thin section the clasts are tightly abutting however there is clear offset between them. The few areas where the clasts are separated are filled with a finely comminuted matrix. Mineral grains show mosaicism. Geochemistry: Mineral composition and geochemistry: Plagioclase composition: An 89.31±1.72Or0.42±0.12 (n=20). Low Ca-pyroxene composition: Fs60.07±1.71Wo3.13±2.24 and FeO/MnO = 31.81±0.84 (n =19). High Ca-pyroxene composition: Fs27.30±1.44Wo42.08±0.2.50 and FeO/MnO = 30.36±1.47 (n=4). Classification: (K. Tait, ROM). Texture and composition suggest the sample is a monomict breccia. | ||||||||||||||||||||||||||||
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) | ||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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