Meteoritical Bulletin: Entry for Northwest Africa 13115

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Northwest Africa 13115

Basic information

Name: Northwest Africa 13115
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13115
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 1524 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	Martian (shergottite)
Recommended:			Martian (shergottite) [explanation]

This is 1 of 321 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 9 Feb 2020

Writeup

help

Writeup from MB 109:

Northwest Africa 13115 (NWA 13115)

(Northwest Africa)

Purchased: 2019 Nov

Classification: Martian meteorite (Shergottite)

History: The stone was acquired in 2019 in Temara, Morocco, by Adam Aaronson and in November 2019 sold to ArtAncient, London.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Diabasic texture with some lattice preferred orientation of elongate prismatic zoned clinopyroxene and lath-like maskelynite grains. Accessory phases include ilmenite, ulvöspinel, merrillite, baddeleyite, pyrrhotite (some with secondary Fe hydroxide staining), silica polymorph and rare fayalite (as inclusions in ulvöspinel and as rim on ilmenite).

Geochemistry: Pigeonite cores (Fa_32.0-34.4Wo_11.3-12.0, FeO/MnO = 31-35, N = 4), subcalcic augite cores (Fs_24.6-24.8Wo_32.3-31.3; FeO/MnO = 28-30, N = 2), ferroan pigeonite rims (Fs_45.8-64.2Wo_12.5-19.3, FeO/MnO = 33-37, N = 6), fayalite (Fa_87.5-88.8, FeO/MnO = 52-55, N = 2), maskelynite (An_52.0-56.5Or_1.3-0.9, N = 3), maskelynite in mesostasis (An_49.0Or_4.2).

Classification: Shergottite (diabasic).

Specimens: 21.0 g including one polished thin section at UWB; main mass with ArtAncient (Chelsea Creek, London, UK).

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2019 Nov
Mass (g):	1524
Pieces:	1
Class:	Martian (shergottite)
Shock stage:	high
Weathering grade:	low
Fayalite (mol%):	87.5-88.8
Ferrosilite (mol%):	32.0-32.4; 24.6-24.8; 45.8-64.2
Wollastonite (mol%):	11.3-12.0; 32.3-31.3; 12.5-19.3
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	21.0
Type spec location:	UWB
Main mass:	ArtAncient
Comments:	Work name M2222; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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