Meteoritical Bulletin: Entry for Northwest Africa 11057

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Northwest Africa 11057

Basic information

Name: Northwest Africa 11057
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11057
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 3.66 kg

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	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 14 Feb 2017

Writeup

help

Writeup from MB 106:

Northwest Africa 11057 (NWA 11057)

(Northwest Africa)

Purchased: 2016 Jun

Classification: Martian meteorite (Shergottite)

History: Purchased by Darryl Pitt in June 2016 from a dealer in Agadir, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Medium-grained igneous assemblage of predominantly zoned clinopyroxene and maskelynite with accessory ilmenite (containing rare inclusions of baddeleyite and K-bearing glass), ulvöspinel, pyrrhotite, merrillite and chlorapatite. Zoned clinopyroxene consists of pigeonite and subcalcic augite with rims of ferropigeonite. Pockets and thin veinlets of shock-produced vesicular glass (deep brown in thin section) are present.

Geochemistry: Pigeonite (Fs_43.9-60.6Wo_14.3-13.5, FeO/MnO = 27-35, N = 3), subcalcic augite (Fs_22.4-43.8Wo_35.8-30.7, FeO/MnO = 27-35, N = 5), ferropigeonite rims (Fs_55.0Wo_19.8; Fs_72.3Wo_14.5; FeO/MnO = 34-37), maskelynite (An_46.0-56.3Or_1.8-0.7, N = 2).

Classification: Martian meteorite (shergottite, mafic, diabasic).

Specimens: 20.4 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Agadir
Date:	P 2016 Jun
Mass (g):	3659
Pieces:	1
Class:	Martian (shergottite)
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	43.9-60.6; 22.4-43.8;55.0; 72.3
Wollastonite (mol%):	14.3-13.5; 35.8-30.7; 19.8; 14.5
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.4
Type spec location:	UWB
Main mass:	DPitt
Comments:	MVCH 84; 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)
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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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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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