Meteoritical Bulletin: Entry for Northwest Africa 8312

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Northwest Africa 8312

Basic information

Name: Northwest Africa 8312
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8312
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 1338 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	L-melt breccia
Recommended:			L-melt breccia [explanation]

This is 1 of 31 approved meteorites classified as L-melt breccia. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 22 Feb 2015

Writeup

Writeup from MB 104:

Northwest Africa 8312 (NWA 8312)

(Northwest Africa)

Purchased: 2014 Jan

Classification: Ordinary chondrite (L, melt breccia)

History: Purchased by GHupé in January 2014 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Unaltered specimen composed of sparse chondrule-bearing L5 clasts within a dominant very fine grain size black matrix of fine grained mafic silicates with accessory sodic plagioclase, chromite and dispersed blebs of kamacite and troilite.

Geochemistry: Olivine (Fa_23.9-24.3, N = 3), orthopyroxene (Fs_13.8Wo_2.0; Fs_20.5-20.8Wo_1.6-1.5, N = 2), subcalcic augite (Fs_16.3-17.3Wo_26.1-22.0).

Classification: Ordinary chondrite (L melt breccia).

Specimens: 22.4 g including one polished thick section at UWB. The remainder is held by GHupé.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2014 Jan
Mass (g):	1338
Pieces:	1
Class:	L-melt breccia
Shock stage:	S6
Weathering grade:	W0
Fayalite (mol%):	23.9-24.3
Ferrosilite (mol%):	20.5-20.8
Wollastonite (mol%):	2.0-1.5
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	22.4
Type spec location:	UWB
Main mass:	G. Hupe
Comments:	GH-456; 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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
Hupe: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full

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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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