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Northwest Africa 7645
Basic information Name: Northwest Africa 7645
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7645
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 43.1 g
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 358 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 Sep 2014
Writeup from MB 103:

Northwest Africa 7645 (NWA 7645)

(Northwest Africa)

Purchased: 2012 Dec

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by DPitt in December 2012 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Polymict fragmental breccia dominated by mineral debris with rare lithic clasts. Minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, troilite, chromite, ilmenite, Ni-free metal, and sparse diogenitic orthopyroxene.

Geochemistry: Host orthopyroxene (Fs59.6Wo1.6; FeO/MnO = 31), clinopyroxene exsolution lamellae (Fs24.1-26.8Wo44.7-43.7; FeO/MnO = 28-34), diogenitic orthopyroxene (Fs31.4Wo1.3; FeO/MnO = 27).

Classification: Eucrite (polymict breccia).

Specimens: 8.7 g of material and one polished thin section are on deposit at UWB. DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2012 Dec
Mass (g):43.1
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):see text
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):8.7
Type spec location:UWB
Main mass:DPitt
Comments:D723; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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