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Northwest Africa 7051
Basic information Name: Northwest Africa 7051
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7051
Observed fall: No
Year found: 2011
Country: Morocco
Mass:help 1201 g
Recommended:  Eucrite    [explanation]

This is 1 of 569 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 from MB 109:

Northwest Africa 7051 (NWA 7051)


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:
  Table 0
  Line 0:
Place of purchase:Tucson Gem and Mineral Show
Date:P 2011
Mass (g):1200.96
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):3.13±2.24; 42.08±2.50
Wollastonite (mol%):1.06±0.30; 1.64±0.34
Classifier:K. Tait, I. Nicklin, ROM
Type spec mass (g):20
Type spec location:ROM
Main mass:Dr. David Gregory
Comments:Submitted by V. Di Cecco, ROM
   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)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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