Meteoritical Bulletin: Entry for Northwest Africa 13728

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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: 40 g

Classification
history:

Recommended:

Pallasite [explanation]

This is 1 of 61 approved meteorites classified as Pallasite. [show all]
Search for other: Metal-rich meteorites, Pallasites

Comments:

Approved 21 Feb 2021

Writeup

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 (Fa_12.5-12.6, 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 Meteoritical Bulletin, no. 110, in preparation (2021)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7579 approved meteorites from (Northwest Africa) (plus 1969 unapproved names)

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