Meteoritical Bulletin: Entry for Northwest Africa 11696

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Northwest Africa 11696

Basic information

Name: Northwest Africa 11696
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11696
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 2.71 kg

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	Diogenite
Recommended:			Diogenite [explanation]

This is 1 of 522 approved meteorites classified as Diogenite. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 27 Mar 2018

Writeup

help

Writeup from MB 107:

Northwest Africa 11696 (NWA 11696)

(Northwest Africa)

Purchased: 2017 Sep

Classification: HED achondrite (Diogenite)

History: Portions of the same disaggregated stone were purchased separately by Habib Naji (540 g) and Rachid Chaoui (2166 g) from a Mauritanian dealer in September 2017. In February 2018 the material obtained by Rachid Chaoui was acquired by Terry Boudreaux and Bob Falls.

Physical characteristics: A disaggregated and quite brittle stone (2706 g); very fresh, mostly dark gray and in part exhibiting a vitreous luster.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) The fresh specimen is composed predominantly of orthopyroxene with accessory troilite, chromite and minor kamacite. Larger orthopyroxene grains are surrounded by regions of finer grained, crushed grains in a cataclastic texture.

Geochemistry: Orthopyroxene (Fs_24.5-25.6Wo_1.9-2.1, FeO/MnO = 27-30, N = 5).

Classification: Diogenite.

Specimens: 24.8 g including one polished thin section and one polished mount at UWB; remaining material with Mr. T. Boudreaux, Mr. H. Naji and Mr. R. Falls.

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Mauritania
Date:	P 2017 Sep
Mass (g):	2706
Pieces:	1
Class:	Diogenite
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	24.5-25.6
Wollastonite (mol%):	1.9-2.2
Classifier:	A. Irving and P. Carpenter, UWS
Type spec mass (g):	24.8
Type spec location:	UWB
Main mass:	T. Boudreaux/H. Naji/R. Falls
Comments:	Work name 349-A; 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)
Boudreaux: Terry Boudreaux, Illinois, United States (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462

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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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