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Northwest Africa 10277
Basic information Name: Northwest Africa 10277
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10277
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 33 g
Meteoritical Bulletin:  MB 104  (2015)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 481 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 3 Oct 2015
Writeup from MB 104:

Northwest Africa 10277 (NWA 10277)

(Northwest Africa)

Purchased: 2014 Sep

Classification: HED achondrite (Diogenite)

History: Purchased by Dr. David Gregory in September 2014 from a Moroccan dealer at the Denver Show.

Petrography: (A. Irving and S. Kuehner, UWS) Aggregate of interlocking grains of orthopyroxene (exhibiting significant preferred orientation of prismatic habit) with minor olivine, chromite, troilite, and rare clinopyroxene and Ni-free metal.

Geochemistry: Orthopyroxene (Fs22.4-24.3Wo1.6-3.1, FeO/MnO = 27-32, N = 3), olivine (Fa24.9-27.6, FeO/MnO = 41-45, N = 3), clinopyroxene (Fs13.5Wo39.1, FeO/MnO = 23).

Classification: Diogenite.

Specimens: 7 g plus a polished thin section at ROM; the remainder is held by DGregory.

Data from:
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2014 Sep
Mass (g):32.98
Shock stage:low
Weathering grade:low
Fayalite (mol%):24.9-27.6
Ferrosilite (mol%):22.4-24.3; 13.5
Wollastonite (mol%):1.6-3.1; 39.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):7
Type spec location:ROM
Main mass:DGregory
Comments:ROM 107; submitted by A. Irving
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (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 8037 approved meteorites from (Northwest Africa) (plus 1947 unapproved names)

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