Meteoritical Bulletin: Entry for Northwest Africa 12632

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Northwest Africa 12632

Basic information

Name: Northwest Africa 12632
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12632
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 64.9 g

Classification
history:

Meteoritical Bulletin:	MB 108	(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 21 Nov 2019

Writeup

Writeup from MB 108:

Northwest Africa 12632 (NWA 12632)

(Northwest Africa)

Purchased: 2019 Feb

Classification: Martian meteorite (Shergottite)

History: Purchased in February 2019 by Darryl Pitt from a Mauritanian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Coarse grained gabbroic specimen (mean grain size ~3 mm) composed predominantly of zoned clinopyroxene and maskelynite with accessory merrillite, chlorapatite, ulvöspinel, ilmenite, pyrrhotite and symplectitic intergrowths of fayalite+hedenbergite+silica polymorph. Very minor secondary calcite is present.

Geochemistry: Subcalcic augite (Fs_29.3Wo_28.2and Fs_34.0Wo_25.7, FeO/MnO = 30 and 31, N = 2), ferropigeonite (Fs_74.1±5.9Wo_17.2±3.2, range Fs_68.0-82.1Wo_20.0-12.8, FeO/MnO = 40 to 42, N = 4), maskelynite (An_46.3-56.4Or_2.2-0.7, N = 2).

Classification: Shergottite (gabbroic).

Specimens: 13.3 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Mauritania
Date:	P 2019 Feb
Mass (g):	64.85
Pieces:	1
Class:	Martian (shergottite)
Shock stage:	high
Weathering grade:	low
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	13.3
Type spec location:	UWB
Main mass:	D. Pitt
Comments:	Work name MVCH 455; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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Geography:

Coordinates:

Unknown.

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

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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