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Northwest Africa 13728
Basic information Name: Northwest Africa 13728
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13728
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 40 g
Classification
  history:
Recommended:  Pallasite    [explanation]

This is 1 of 74 approved meteorites classified as Pallasite.   [show all]
Search for other: Metal-rich meteorites, Pallasites
Comments: Approved 21 Feb 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13728 (NWA 13728)

(Northwest Africa)

Purchased: 2020 Sep

Classification: Pallasite

History: Purchased by Shun-Chung Yang and Juan Chen in September 2020 from a dealer in Tindouf, Algeria.

Physical characteristics: The material consists of numerous small (up to 1 cm) olivine-rich, metal-bearing fragments (total weight 40 g).

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Composed predominantly of subequal amounts of olivine (grainsize up to 2.2 mm) and altered metal (kamacite plus taenite) with minor accessory chromite.

Geochemistry: Olivine (Fa12.5-12.6, FeO/MnO = 44-49, N = 4), kamacite (Ni = 6.9 wt.%), taenite (Ni = 21.6 wt.%).

Classification: Pallasite.

Specimens: 8.3 g including a polished mount at UWB; remainder with Mr. S.-C. Yang and Mr. J. Chen.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2020 Sep
Mass (g):40
Pieces:many
Class:Pallasite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):12.5-12.6
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):8.3
Type spec location:UWB
Main mass:S.-C. Yang, J. Chen
Comments:Work name SCY-8; 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 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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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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