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Northwest Africa 11728
Basic information Name: Northwest Africa 11728
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11728
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 2.16 kg
Classification
  history:
Recommended:  L4    [explanation]

This is 1 of 1613 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 7 Mar 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11728 (NWA 11728)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (L4)

History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005, subsequently acquired by the Hollis Collection and then donated to PSF.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, closely-packed chondrules are set in a finer grained matrix containing stained metal.

Geochemistry: Olivine (Fa24.5-24.9, N = 3), orthopyroxene (Fs19.4-20.5Wo0.5-1.2, N = 2), subcalcic augite (Fs21.6Wo29.1), augite (Fs9.6Wo37.1).

Classification: Ordinary chondrite (L4).

Specimens: The entire specimen including one polished thin section is at PSF.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2005
Mass (g):2157
Pieces:1
Class:L4
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):24.5-24.9
Ferrosilite (mol%):19.4-20.5
Wollastonite (mol%):0.5-1.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):2157
Type spec location:PSF
Main mass:PSF
Comments:Work name CHC18007; submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

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