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Northwest Africa 7911
Basic information Name: Northwest Africa 7911
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7911
Observed fall: No
Year found: 2002
Country: (Northwest Africa)
Mass:help 97.6 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  L4
Recommended:  L4    [explanation]

This is 1 of 1728 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 2 Apr 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 7911 (NWA 7911)

(Northwest Africa)

Purchased: 2002

Classification: Ordinary chondrite (L4)

History: This sample was part of a collection of unidentified NWA samples purchased by the AMNH.

Physical characteristics: The meteorite has a small amount of fusion crust. Some fusion crust was removed by weathering and some surfaces appear to have desert varnish.

Petrography: The meteorite has numerous sharply bound chondrules and re-crystallized matrix. Average chondrule size is ~500 μm (n=25).

Geochemistry: Olivine Fa25.7±1.5, n=22; pyroxene Fs19.6±2.6Wo1.4, n=19.

Classification: Meteorite is an ordinary chondrite, L4. Weathering grade is W1, shock stage is S2.

Data from:
  MB103
  Table 0
  Line 0:
Date:P 2002
Mass (g):97.6
Pieces:1
Class:L4
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):25.7±1.5
Ferrosilite (mol%):19.6±2.6
Wollastonite (mol%):1.4
Classifier:L. Neil, KCCU
Type spec mass (g):19.6
Type spec location:AMNH
Main mass:AMNH
Comments:Submitted by Layton Neil and Michael K. Weisberg
Institutions
   and collections
AMNH: Department of Earth and Planetary Sciences, American Museum of Natural History, Central Park West, New York, NY 10024, United States (institutional address; updated 18 May 2013)
KCCU: Kingsborough College of the City University of New York, Brooklyn, NY 11235, United States (institutional address; updated 28 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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