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Northwest Africa 10132
Basic information Name: Northwest Africa 10132
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10132
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 940 g
Meteoritical Bulletin:  MB 104  (2015)  Achondrite-ung
Recommended:  Achondrite-ung    [explanation]

This is 1 of 135 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Approved 23 May 2015
Writeup from MB 104:

Northwest Africa 10132 (NWA 10132)

(Northwest Africa)

Purchased: 2015 Mar

Classification: Ungrouped achondrite

History: Purchased by Darryl Pitt in March 2015 from a dealer in Zagora, Morocco.

Physical characteristics: Single friable stone (940 g) composed of glistening, vitreous yellow-green crystals with minor tiny black grains. Minor brownish weathering occurs on exterior surfaces.

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen with an inequigranular to poikilitic texture. Composed predominantly of orthopyroxene (up to 4.8 mm, some as oikocrysts) and olivine (up to 2 mm, some as chadacrysts within orthopyroxene) with interstitial albitic feldspar (~5 vol.%) and accessory Ti-poor chromite and awaruite.

Geochemistry: Olivine (Fa53.3-53.5, FeO/MnO = 115-135, NiO = 1.1 wt.%, N = 4), orthopyroxene (Fs41.6-42.7Wo3.1-3.4, FeO/MnO = 78-88, Cr2O3 = 0.3 wt.%, N = 3), plagioclase (Ab91.0-92.3An1.8-2.2Or7.2-5.6, N = 2). Oxygen isotopes (K. Ziegler, UNM): Analyses of four acid-washed subsamples by laser fluorination gave, respectively, δ17O 0.893, 1.373, 1.273, 0.857; δ18O 3.832, 4.702, 4.557, 3.789; Δ17O -1.130, -1.110, -1.133, -1.144 per mil.

Classification: Achondrite (ungrouped, ultramafic, sodic). This specimen shares many mineralogical similarities with Northwest Africa 6693 and Northwest Africa 6704, but cannot be paired with those specimens based on textural differences and absence of vesicles. The presence of interstitial albite, the elevated Ni in olivine, plus presence of awaruite metal and lack of kamacite are significant differences from lodranites/acapulcoites.

Specimens: 27 g including one polished thin section and one polished thick section at UWB. The remaining material is held by DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2015 Mar
Mass (g):940
Shock stage:low
Weathering grade:low
Fayalite (mol%):53.3-53.5
Ferrosilite (mol%):41.6-42.7
Wollastonite (mol%):3.1-3.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):27
Type spec location:UWB
Main mass:D. Pitt
Comments:MAC 130; submitted by A. Irving
Plots: O isotopes:  
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
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 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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