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Northwest Africa 10268
Basic information Name: Northwest Africa 10268
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10268
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 89 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  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 18 Jan 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10268 (NWA 10268)

(Northwest Africa)

Purchased: 2015 Feb

Classification: HED achondrite (Diogenite)

History: Three identical crusted stones were purchased by Gary Fujihara from a Moroccan dealer in February 2015.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh, coarse grained specimen consisting predominantly of interlocking grains of orthopyroxene (up to 8 mm, finely exsolved) with ~10 vol.% calcic plagioclase plus accessory chromite and minor troilite. Both pyroxene and plagioclase exhibit marked undulose extinction. Sparse thin shock veinlets crosscut the specimen.

Geochemistry: Orthopyroxene (Fs34.9-36.9Wo2.6-2.5, FeO/MnO = 29-31, N = 3), clinopyroxene exsolution lamellae (Fs13.7-15.1Wo43.4-43.1, FeO/MnO = 25, N = 2), plagioclase (An83.5-85.2Or0.5-0.9, N = 3).

Classification: Diogenite (noritic). Although the Fs content of low-Ca pyroxene is in the range for cumulate eucrites, a diogenite classification is supported by the low plagioclase abundance and the presence of orthopyroxene rather than pigeonite. Other diogenites have similar pyroxene composition (NWA 6928, NWA 8000, NWA 8367, NWA 8744).

Specimens: 18.2 g including one polished thin section at UWB; main masses with Mr. G. Fujihara.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015 Feb
Mass (g):89
Pieces:3
Class:Diogenite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):34.9-36.9
Wollastonite (mol%):2.6-2.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):18.2
Type spec location:UWB
Main mass:G. Fujihara
Comments:GF15-4; submitted by A. Irving
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8025 approved meteorites from (Northwest Africa) (plus 1951 unapproved names)

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