Meteoritical Bulletin: Entry for Northwest Africa 10764

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Northwest Africa 10764

Basic information

Name: Northwest Africa 10764
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10764
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 446 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	L(LL)3
Recommended:			L(LL)3 [explanation]

This is 1 of 16 approved meteorites classified as L(LL)3. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 2 Sep 2016

Writeup

Writeup from MB 105:

Northwest Africa 10764 (NWA 10764)

(Northwest Africa)

Purchased: 2016 Feb

Classification: Ordinary chondrite (L(LL)3)

History: Purchased by Bob Falls in February 2016 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Well formed, fairly closely packed chondrules (apparent diameter 500 ± 300 μm) in a finer grained matrix containing altered metal.

Geochemistry: Olivine (Fa_1.5-43.8; Cr₂O₃ in ferroan examples 0.02-0.08 wt.%, mean 0.04±0.02 wt.%; N = 8), orthopyroxene (Fs_1.0-40.2Wo_1.0-2.3, N = 3), clinopyroxene (Fs_9.8-15.2Wo_37.7-41.7, N = 2).

Classification: Ordinary chondrite (L(LL)3).

Specimens: 21.0 g including one polished thin section at UWB; remainder with Mr. R. Falls.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2016 Feb
Mass (g):	446.2
Pieces:	1
Class:	L(LL)3
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	1.5-43.8
Ferrosilite (mol%):	1.0-40.2
Wollastonite (mol%):	1.0-2.3
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	21.0
Type spec location:	UWB
Main mass:	R. Falls
Comments:	BF16-9; 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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