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Northwest Africa 10134
Basic information Name: Northwest Africa 10134
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10134
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 25.4 g
Meteoritical Bulletin:  MB 104  (2015)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 298 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 23 May 2015
Writeup from MB 104:

Northwest Africa 10134 (NWA 10134)

(Northwest Africa)

Purchased: 2015 Jan

Classification: Martian meteorite (Shergottite)

History: Purchased by Dr. David Gregory in January 2015 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Physical characteristics: A small discoidal-shaped stone (25.4 g) covered by black fusion crust.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively fine grained (mean grainsize 0.4 mm) with an intersertal texture, and composed predominantly of stubby prismatic grains of zoned clinopyroxene (60 vol.%) and maskelynite (37 vol.%) with accessory Cr-bearing ulvöspinel, ilmenite, chlorapatite, merrillite, pyrrhotite, silica+plagioclase intergrowths and interstitial microlite-bearing glass. Sparse patches of vesicular shock glass are present.

Geochemistry: Low-Ca pyroxene (Fs31.6-56.3Wo11.0-14.0; FeO/MnO = 33-39), high-Ca pyroxene (Fs21.0-38.6Wo36.0-27.0; FeO/MnO = 26-38), ferroan subcalcic augite rims (Fs71.7Wo23.5; FeO/MnO = 49), maskelynite (An44.4-55.3Or5.0-1.2, N = 2), plagioclase intergrown with silica (An36.6Or3.0).

Classification: Martian meteorite (shergottite).

Specimens: 5.2 g including one polished thin section and one polished thick section at ROM. The remaining material is held by DGregory.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2015 Jan
Mass (g):25.4
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):31.6-56.3; 21.0-38.6
Wollastonite (mol%):11.0-14.0; 36.0-27.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):5.2
Type spec location:ROM
Main mass:DGregory
Comments:DGR019-15; 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 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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