Meteoritical Bulletin: Entry for Northwest Africa 10776

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Northwest Africa 10776

Basic information

Name: Northwest Africa 10776
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10776
Observed fall: No
Year found: 2002
Country: Morocco
Mass: 12.1 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	Eucrite
Recommended:			Eucrite [explanation]

This is 1 of 513 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 23 Aug 2016

Writeup

Writeup from MB 105:

Northwest Africa 10776 (NWA 10776)

Morocco

Purchased: 2002

Classification: HED achondrite (Eucrite)

History: The meteorite was bought in 2002 in Sainte-Marie-aux-Mines, France, from a Moroccan dealer.

Physical characteristics: A single crusted stone. Cut surface reveals a gray interior with 500 μm to 1 mm dark clasts.

Petrography: Magmatic rock with ophitic to subophitic texture, dominated by pyroxenes (some zoned, some exsolved) and plagioclase with typical grain size 250 μm. Accessory troilite, chromite, ilmenite, silica polymorph. Rare metal. The rock contains quenched and shock-darkened clasts to mm.

Geochemistry: Pyroxene Fs_46.7±4.7Wo_6.2±1.1, FeO/MnO=35.3±1.7 (N=3). Plagioclase An_69.0-89.1Ab_28.6-10.6Or_2.6-0.3(N=2). Magnetic susceptibility log χ (× 10^-9 m³/kg)=2.66.

Classification: Achondrite (eucrite). Minimal weathering.

Specimens: 3.2 g and a polished section at CEREGE. Main mass with N. Tourment.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Sainte-Marie-aux-Mines, France
Date:	P 2002
Mass (g):	12.1
Pieces:	1
Class:	Eucrite
Weathering grade:	minimal
Magnetic suscept.:	2.66
Classifier:	Jérôme Gattacceca, CEREGE
Type spec mass (g):	3.2
Type spec location:	CEREGE
Main mass:	N. Tourment
Comments:	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 29 Oct 2018)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

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Geography:

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 1670 approved meteorites from Morocco (plus 23 unapproved names) (plus 1 impact crater)

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