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Northwest Africa 11507
Basic information Name: Northwest Africa 11507
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11507
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 1306 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  L4
Recommended:  L4    [explanation]

This is 1 of 2000 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 3 Nov 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11507 (NWA 11507)

(Northwest Africa)

Purchased: 2017 Jul

Classification: Ordinary chondrite (L4)

History: Purchased by Darryl Pitt in July 2017 from a dealer in Erfoud, Morocco.

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

Geochemistry: Olivine (Fa23.4-23.9, N = 3), orthopyroxene (Fs19.0-19.2Wo1.0-0.8, N = 2), clinopyroxene (Fs7.6-9.4Wo41.4-37.4, N = 2).

Classification: Ordinary chondrite (L4).

Specimens: 38.4 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2017 Jul
Mass (g):1305.5
Pieces:1
Class:L4
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):23.4-23.9
Ferrosilite (mol%):19.0-19.2
Wollastonite (mol%):1.0-0.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):38.4
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MVCH 311; submitted by A. Irving
Institutions
   and collections		 UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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