Meteoritical Bulletin: Entry for Northwest Africa 10921

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Northwest Africa 10921

Basic information

Name: Northwest Africa 10921
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10921
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 137 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	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 3 Dec 2016

Writeup

Writeup from MB 105:

Northwest Africa 10921 (NWA 10921)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Diogenite)

History: Purchased by Mendy Ouzillou from a Moroccan meteorite dealer in 2016.

Physical characteristics: Single stone, partially fusion crusted. Black fusion crust up to ~1 mm thick. Broken surfaces show centimeter-size green pyroxene grains, many with cleavage faces.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows approximately 98% orthopyroxene with accessory silica, chromite, Fe-metal, and Fe-sulfide. No olivine or plagioclase observed.

Geochemistry: (C. Agee and M. Spilde, UNM) Low-Ca pyroxene Fs_28.0±0.3Wo_3.2±0.2, Fe/Mn=29±1, n=8.

Classification: Orthopyroxenitic diogenite

Specimens: 20.14 g including a probe mount on deposit at UNM, Mendy Ouzillou holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2016
Mass (g):	137
Pieces:	1
Class:	Diogenite
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	28.0±0.3
Wollastonite (mol%):	3.2±0.2
Classifier:	C. Agee, UNM
Type spec mass (g):	20.14
Type spec location:	UNM
Main mass:	Mendy Ouzillou
Comments:	Field name MO-8; submitted by C. Agee

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)

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:

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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