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Northwest Africa 10253
Basic information Name: Northwest Africa 10253
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10253
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 6.67 kg
Meteoritical Bulletin:  MB 104  (2015)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 329 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 4 Sep 2015
Writeup from MB 104:

Northwest Africa 10253 (NWA 10253)

(Northwest Africa)

Purchased: 2015

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Darryl Pitt from a Moroccan meteorite dealer, reportedly found in Mauritania near the Algerian border.

Physical characteristics: Weathered irregular exterior. Saw cuts reveal a fragmental breccia with numerous feldspathic and mafic clasts set in a gray groundmass.

Petrography: (C. Agee, UNM) This meteorite is a very heterogeneous polymict breccia consisting of numerous microgabbro clasts, shock melt pools and veins, fragmental plagioclase, pyroxene, and olivine. Accessory Fe-oxide, troilite, Ti-chromite, ilmenite, and silica were observed. Thin calcite weathering veins are present.

Geochemistry: (C. Agee and N. Muttik, UNM) olivine Fa38.3±2.7, Fe/Mn=102±5, n=14; pigeonite Fs39.9±14.7Wo12.7±5.5, Fe/Mn=63±9, n=14; augite Fs42.7±14.2Wo27.0±7.9, Fe/Mn=69±11, n=10; anorthite plagioclase An95.3±1.8Ab4.4±1.7Or0.2±0.1, n=6; labradorite plagioclase An55.5Ab43.2Or1.3, n=1; Shock melt (10 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=46.1±1.6, TiO2=0.63±0.46, Al2O3=23.1±4.8, Cr2O3=0.16±0.09, MgO=6.8±3.5, FeO=7.1±3.2, MnO=0.09±0.05, CaO=14.0±2.0, NiO=0.03±0.03, Na2O=0.55±0.21, K2O=0.12±0.08 (all wt%), Fe/Mn=81±23, Mg#=61±8, MgO+FeO=13.9±6.0 (wt%), n=31.

Classification: Lunar feldspathic breccia

Specimens: 32.5 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015
Mass (g):6674.1
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):38.3±2.7
Ferrosilite (mol%):39.9±14.7, 42.7±14.2
Wollastonite (mol%):12.7±5.5, 27.0±7.9
Classifier:C. Agee, UNM
Type spec mass (g):32.5
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MAC 136; submitted by C. Agee, UNM
   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)
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 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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