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Northwest Africa 13506
Basic information Name: Northwest Africa 13506
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13506
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 233 g
Classification
  history:
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 281 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 23 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13506 (NWA 13506)

(Northwest Africa)

Purchased: 2020 Jul

Classification: Martian meteorite (Shergottite)

History: Purchased in July 2020 by Said Yousfi from an Algerian dealer and subsequently sold to Luca Cableri.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The specimen has a intergranular texture (mean grainsize ~500 µm) and is composed predominantly of prismatic grains of clinopyroxene (consisting of patchily zoned pigeonite and subcalcic augite with ferropigeonite rims) and lath-like grains of maskelynite. Accessory phases include silica polymorph, ulvöspinel, ilmenite, merrillite and pyrrhotite plus minor secondary Fe oxide and barite.

Geochemistry: Pigeonite (Fs27.9Wo18.8, FeO/MnO = 28), subcalcic augite (Fs26.3-42.5Wo25.7-33.6, FeO/MnO = 28-35, N = 3), ferropigeonite rims (Fs62.8Wo18.7; Fs82.1Wo11.6; FeO/MnO = 39-40; N = 2), maskelynite (An51.3-53.9Or1.4-1.6, N = 3).

Classification: Shergottite (fine-intergranular).

Specimens: 20.1 g including one polished thin section at UWB; remainder with Mr. L. Cableri.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020 Jul
Mass (g):233
Pieces:1
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):27.9; 26.3-42.5; 62.8; 82.1
Wollastonite (mol%):18.8; 25.7-33.6; 18.7; 11.6
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.1
Type spec location:UWB
Main mass:L. Cableri
Comments:Work name SY 60; 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:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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