Meteoritical Bulletin: Entry for Northwest Africa 11912

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Northwest Africa 11912

Basic information

Name: Northwest Africa 11912
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11912
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 142 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	H5
Recommended:			H5 [explanation]

This is 1 of 11567 approved meteorites (plus 23 unapproved names) classified as H5. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 15 Sep 2018

Writeup

Writeup from MB 107:

Northwest Africa 11912 (NWA 11912)

(Northwest Africa)

Purchased: February 2014

Classification: Ordinary chondrite (H5)

History: Purchased by Fred Olsen in 2014

Petrography: (D. Sheikh, FSU) Chondrule boundaries blurred (500±80 μm, N=12). Recrystallized matrix with typical plagioclase size about 10 μm.

Geochemistry: Although the vast majority of olivine and orthopyroxene analyses are clustered, a few grains are unequilibrated. Olivine range Fa_14.1-24.0, mean Fa_18.4±0.3(N=50); orthopyroxene, range Fs_15.74-30.36Wo_0.95-3.34, mean Fs_19.5±0.3Wo_1.7±0.1(N=60).

Classification: Ordinary Chondrite (H5)

Specimens: 24.30 g at UCLA; main mass with Fred Olsen.

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Tucson, Arizona
Date:	P February 2014
Mass (g):	142
Pieces:	1
Class:	H5
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	18.4±0.3 (N=50)
Ferrosilite (mol%):	19.5±0.3 (N=60)
Wollastonite (mol%):	1.7±0.1
Classifier:	D. Sheikh, FSU
Type spec mass (g):	24.30
Type spec location:	UCLA
Main mass:	Fred Olsen
Comments:	Submitted by Daniel Sheikh

Institutions
and collections

UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462

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Photos:

Credit	Photos
Public domain photographs:
Daniel Sheikh

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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