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Northwest Africa 8750
Basic information Name: Northwest Africa 8750
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8750
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 17.4 g
Meteoritical Bulletin:  MB 104  (2015)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 391 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 10 Feb 2015
Writeup from MB 104:

Northwest Africa 8750 (NWA 8750)

(Northwest Africa)

Purchased: 2014 Mar

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Darryl Pitt in March 2014 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed predominantly of eucritic crystalline debris (calcic plagioclase, exsolved pigeonite, ilmenite), some gabbroic eucrite clasts and ~5 vol.% diogenitic orthopyroxene grains. Pigeonite is brownish-yellow in thin section and plagioclase is polycrystalline. Small vugs containing calcite were noted, and barite is present in the altered matrix.

Geochemistry: Low-Ca pyroxene (Fs56.6-57.0Wo7.0-7.6, FeO/MnO = 32-34, N = 3), high-Ca pyroxene (Fs30.1-31.1Wo39.6-38.8, FeO/MnO = 30-34, N = 3), diogenitic orthopyroxene (core Fs31.6Wo3.9, FeO/MnO = 34; rim Fs45.5Wo4.0, FeO/MnO = 36).

Classification: Eucrite (polymict breccia).

Specimens: 3.93 g including one polished thin section at UWB; the remainder is held by DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2014 Mar
Mass (g):17.4
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):56.6-57.0; 30.1-31.1; 31.6
Wollastonite (mol%):7.0-7.6; 39.6-38.8; 3.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):3.93
Type spec location:UWB
Main mass:D. Pitt
Comments:MAC 72; 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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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