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Northwest Africa 11240
Basic information Name: Northwest Africa 11240
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11240
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 39.7 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  H4
Recommended:  H4    [explanation]

This is 1 of 5778 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 26 Apr 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11240 (NWA 11240)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (H4)

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

Petrography: (A. Irving and S. Kuehner, UWS) Fairly closely packed, well-formed, relatively small chondrules are set in a finer grained matrix containing altered metal.

Geochemistry: Olivine (Fa17.6-17.8, N = 3), orthopyroxene (Fs15.7-15.8Wo0.9-0.8, N = 2), subcalcic augite (Fs9.8Wo34.4), diopside (Fs4.9Wo47.1).

Classification: Ordinary chondrite (H4).

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

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2005
Mass (g):39.68
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):17.6-17.8
Ferrosilite (mol%):15.7-15.8
Wollastonite (mol%):0.9-0.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):39.68
Type spec location:PSF
Main mass:PSF
Comments:Work name CHC17011; 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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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