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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:help 142 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  H5
Recommended:  H5    [explanation]

This is 1 of 10851 approved meteorites (plus 19 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
Writeuphelp
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 Fa14.1-24.0, mean Fa18.4±0.3 (N=50); orthopyroxene, range Fs15.74-30.36Wo0.95-3.34, mean Fs19.5±0.3Wo1.7±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
Find references in NASA ADS:
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Photos:
CreditPhotos
Public domain photographs:
Daniel Sheikh   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8390 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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