Meteoritical Bulletin: Entry for Northwest Africa 10972

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Northwest Africa 10972

Basic information

Name: Northwest Africa 10972
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10972
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass: 12.05 kg

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	L3
Recommended:			L3 [explanation]

This is 1 of 718 approved meteorites (plus 1 unapproved name) classified as L3. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 26 Nov 2016

Writeup

Writeup from MB 105:

Northwest Africa 10972 (NWA 10972)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (L3)

History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005 and subsequently acquired by the Hollis Collection.

Petrography: (A. Irving and S. Kuehner, UWS) Unequilibrated with more magnesian cores in olivine and orthopyroxene. Well-formed, fairly closely packed chondrules (apparent diameter 450±300 µm) are set in a finer matrix containing stained metal and minor merrillite.

Geochemistry: Olivine (predominantly Fa_24.6-29.6, magnesian core Fa_8.8, Cr₂O₃ < 0.04 wt.%, N = 7), orthopyroxene (Fs_7.4-19.2Wo_0.2-1.0, N = 3), clinopyroxene (Fs_8.4-10.7Wo_43.6-42.6, N = 2). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 4.62.

Classification: Ordinary chondrite (L3).

Specimens: 121 g including one polished thin section at PSF; remainder in the Hollis Collection.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Munich
Date:	P 2005
Mass (g):	12052
Pieces:	1
Class:	L3
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	8.8-29.6
Ferrosilite (mol%):	7.4-19.2
Wollastonite (mol%):	0.2-1.0
Magnetic suscept.:	4.62
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	121
Type spec location:	PSF
Main mass:	Hollis Collection
Comments:	CHC16015; submitted by A. Irving

Institutions
and collections

PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)

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 7655 approved meteorites from (Northwest Africa) (plus 1972 unapproved names)

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