Meteoritical Bulletin: Entry for Northwest Africa 11083

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Northwest Africa 11083

Basic information

Name: Northwest Africa 11083
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11083
Observed fall: No
Year found: 2016
Country: Western Sahara
Mass: 7.7 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	Eucrite-pmict
Recommended:			Eucrite-pmict [explanation]

This is 1 of 408 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 14 Feb 2017

Writeup

Writeup from MB 106:

Northwest Africa 11083 (NWA 11083)

Western Sahara

Purchased: 2016

Classification: HED achondrite (Eucrite, polymict)

Physical characteristics: Light grey stone. Cut surface reveals dark-gray interior with lighter clasts to 5 mm.

Petrography: Brecciated igneous rock with basaltic (ophitic to sub-opthitic texture) and cumulate clasts in a clastic matrix. Main minerals are low-Ca pyroxenes (with augite exsolution) and plagioclase. rare metal. Clasts of diogenitic composition are found but amount to less than 10 vol% of the rock.

Geochemistry: low-Ca pyroxene: basaltic material Fs_59.1±2.5Wo_5.0±1.6(N=3), cumulate material Fs_40.6±7.6Wo_5.0±3.0(N=3), diogenite material Fs_26.0Wo_3.0(N=1), FeO/MnO=31.8±2.4 (N=7). Plagioclase An_92.4±2.2Ab_7.3±2.1Or_0.3±0.1(N=2). Magnetic susceptiblity log χ (× 10^-9 m³/kg) = 3.22.

Classification: Eucrite, polymict. Weathering low.

Specimens: 1.4 g at CEREGE. Main mass with Michel Franco.

Data from:
  MB106
  Table 0
  Line 0:

Date:	P 2016
Mass (g):	7.65
Pieces:	1
Class:	Eucrite-pmict
Weathering grade:	low
Ferrosilite (mol%):	46.5±13.1 (N=7)
Wollastonite (mol%):	4.7±2.3
Magnetic suscept.:	3.22
Classifier:	J. Gattacceca, CEREGE
Type spec mass (g):	1.6
Type spec location:	CEREGE
Main mass:	Michel Franco
Comments:	work name MF2016-02; submitted by Jérôme Gattacceca

Institutions
and collections

CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 10 Jun 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:

Western Sahara

Coordinates:

Unknown.

Statistics:
This is 1 of 280 approved meteorites from Western Sahara (plus 20 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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