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Northwest Africa 13508
Basic information Name: Northwest Africa 13508
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13508
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1075 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 577 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 16 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13508 (NWA 13508)

(Northwest Africa)

Purchased: 2020 Jun

Classification: Ureilite

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

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Protogranular texture with some preferred orientation of non-equidimensional grains. Composed predominantly of olivine (~75 vol.%) accompanied by both pigeonite and augite plus accessory graphite and altered kamacite (enclosing small grains of Cr-troilite, daubreelite and schreibersite). Olivine grains have relatively narrow reduced rims with blebby Fe metal, and some grains contain uncommon spherules of chromite.

Geochemistry: Olivine (cores Fa18.6±0.1, N = 3; rims Fa6.3-13.4, N = 3), pigeonite (Fs15.7±0.1Wo9.8±0.1, N = 4), augite (Fs9.6±0.1Wo35.7±0.1, N = 4).

Classification: Ureilite.

Specimens: 20.8 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang and Mr. J. Chen.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020 Jun
Mass (g):1075
Pieces:6
Class:Ureilite
Shock stage:low
Weathering grade:low
Fayalite (mol%):18.6±0.1
Ferrosilite (mol%):15.7±0.1; 9.6±0.1
Wollastonite (mol%):9.8±0.1; 35.7±0.1
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.8
Type spec location:UWB
Main mass:S.-C. Yang/J. Chen
Comments:Work name SCY-2; 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)
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7820 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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