Meteoritical Bulletin: Entry for Northwest Africa 11339

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Northwest Africa 11339

Basic information

Name: Northwest Africa 11339
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11339
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 161 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	Martian (shergottite)
Recommended:			Martian (shergottite) [explanation]

This is 1 of 322 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all]
Search for other: Martian meteorites

Comments:

Approved 14 Jul 2017

Writeup

help

Writeup from MB 106:

Northwest Africa 11339 (NWA 11339)

(Northwest Africa)

Purchased: 2017 Apr

Classification: Martian meteorite (Shergottite)

History: Purchased by Ben Hoefnagels in April 2017 from a dealer in Zagora, Morocco.

Physical characteristics: A single stone (161 g) partially covered by black fusion crust. The fresh interior is greenish-gray with sporadic small dark glass pockets and thin black, glassy veinlets.

Petrography: (A. Irving and S. Kuehner, UWS) The specimen is composed predominantly (~70 vol.%) of stubby prismatic grains of zoned clinopyroxene (grainsize 0.3-0.5 mm) with ~30 vol.% maskelynite plus accessory ilmenite, titanomagnetite, pyrrhotite, merrillite and K-Al-Si-rich glass. Some thin cross-cutting veinlets of black shock glass are present.

Geochemistry: Pigeonite (Fs_34.3-60.5Wo_10.8-15.5, FeO/MnO = 32-38, N = 4), subcalcic augite (Fs_24.4-40.8Wo_33.3-28.4, FeO/MnO = 32-36, N = 4), maskelynite (An_42.0-47.7Or_3.9-3.3, N = 2).

Classification: Martian (shergottite, pyroxene-rich).

Specimens: 20.4 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	P 2017 Apr
Mass (g):	161
Pieces:	1
Class:	Martian (shergottite)
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	34.3-60.5; 24.4-40.8
Wollastonite (mol%):	10.8-15.5; 33.3-28.4
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.4
Type spec location:	UWB
Main mass:	B. Hoefnagels
Comments:	Work name BH059; 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)

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 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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