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Northwest Africa 13507
Basic information Name: Northwest Africa 13507
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13507
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 259 g
Recommended:  Lodranite    [explanation]

This is 1 of 89 approved meteorites classified as Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites
Comments: Approved 23 Jan 2021
Writeup from MB 110:

Northwest Africa 13507 (NWA 13507)

(Northwest Africa)

Purchased: 2020 Jun

Classification: Primitive achondrite (Lodranite)

History: Purchased by Sun-Chung Yang and Juan Chen in June 2020 from an Algerian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of some lithic clasts with protogranular texture (grainsize up to 4 mm) plus related disaggregated crystalline debris in a very sparse fine grained matrix. Major minerals are olivine, low-Ca pyroxene (exhibiting polysynthetic twinning) and augite, accompanied by accessory Fe metal (partially altered to chlorine-bearing hydroxides), Cr-bearing troilite and small grains of schreibersite.

Geochemistry: Olivine (Fa9.1-12.3, FeO/MnO = 16-23, N = 5), low-Ca pyroxene (Fs10.5-10.7Wo4.7-4.8, FeO/MnO = 13-14, N = 5), augite (Fs6.2-6.4Wo37.2-37.7, FeO/MnO = 10-11, N = 4).

Classification: Lodranite (breccia).

Specimens: 29.4 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang and Mr. J. Chen.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020 Jun
Mass (g):259
Shock stage:low
Weathering grade:low
Fayalite (mol%):9.1-12.3
Ferrosilite (mol%):10.5-10.7; 6.2-6.4
Wollastonite (mol%):4.7-4.8; 37.2-37.7
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):29.4
Type spec location:UWB
Main mass:S.-C. Yang/J. Chen
Comments:Work name SCY-1; submitted by A. Irving
   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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann   

     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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