Northwest Africa 13187

Name: Northwest Africa 13187
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13187
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 1600 grams

Recommended:  Martian (shergottite)    
This is 1 of 257 approved meteorites classified as Martian (shergottite).  
 

Approved 29 Feb 2020

Northwest Africa 13187 (NWA 13187)

(Northwest Africa)

Purchased: 2019 Sep

Classification: Martian meteorite (Shergottite)

History: Purchased by Mark Lyon in September 2019 from a Moroccan dealer. Some of this material was subsequently sold to Mike Fleeman and Roberto Vargas.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Diabasic texture. Composed predominantly of zoned clinopyroxene and maskelynite with accessory ulvöspinel (some Cr-bearing), ilmenite, silica polymorph, merrillite, pyrrhotite and minor secondary calcite.

Geochemistry: Subcalcic augite cores (Fs20.3-23.3Wo36.2-32.0, FeO/MnO = 28-29, N = 4), ferroan pigeonite rims (Fs52.4-59.2Wo14.2-19.7, FeO/MnO = 36-39, N = 4), maskelynite (An50.5-57.2Or1.9-0.7, N = 3).

Classification: Shergottite (diabasic).

Specimens: 20.1 g including one polished thin section at UWB; remainder held by Mr. M. Lyon, Mr. M. Fleeman (550 g) and Mr. R. Vargas (50 g).


Place of purchase:Morocco
Date:P 2019 Sep
Mass (g):1600
Pieces:2
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low

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