Meteoritical Bulletin: Entry for Northwest Africa 10762

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Northwest Africa 10762

Basic information

Name: Northwest Africa 10762
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10762
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass: 2.44 kg

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	H3
Recommended:			H3 [explanation]

This is 1 of 710 approved meteorites (plus 2 unapproved names) classified as H3. [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 9 Jul 2016

Writeup

Writeup from MB 105:

Northwest Africa 10762 (NWA 10762)

(Northwest Africa)

Purchased: 2015 Feb

Classification: Ordinary chondrite (H3)

History: Purchased by Dr. David Gregory in February 2008 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed chondrules (apparent diameter 400±300 μm) in a relatively coarse grained matrix containing relatively abundant altered metal. Silica polymorph is present in some chondrules.

Geochemistry: Olivine (Fa_18.3-19.2, Cr₂O₃ <0.03 wt.%; relict cores Fa_0.9; N = 5), orthopyroxene (Fs_3.2-17.3Wo_0.3-1.1, N = 3), subcalcic augite (Fs_10.2Wo_32.1), augite (Fs_5.1Wo_41.0).

Classification: Ordinary chondrite (H3). The presence of relict forsteritic cores in olivine and the compositional range in pyroxenes suggest that this is a H3.9 rather than H4 chondrite.

Specimens: 261.2 g plus one polished thin section at ROM; remainder with DGregory.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2015 Feb
Mass (g):	2442.16
Pieces:	1
Class:	H3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	18.3-19.2; 0.9
Ferrosilite (mol%):	3.2-17.3
Wollastonite (mol%):	0.3-1.1
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	261.2
Type spec location:	ROM
Main mass:	DGregory
Comments:	DGR024-15; submitted by A. Irving

Institutions
and collections

ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 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)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)

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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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