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Northwest Africa 13186
Basic information Name: Northwest Africa 13186
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13186
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 40.5 g
Classification
  history:
Recommended:  L4    [explanation]

This is 1 of 1709 approved meteorites (plus 24 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 9 Feb 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13186 (NWA 13186)

(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, UWS and J. Boesenberg, BrownU) Well-formed chondrules are set in a recrystallized matrix containing altered metal.

Geochemistry: Olivine (Fa25.0±0.3, range Fa24.7-25.3, N = 5), low-Ca pyroxene (Fs20.6±0.2Wo1.7±0.1, range Fs20.5-20.9Wo1.6-1.8, N = 5).

Classification: Ordinary chondrite (L4).

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

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2005
Mass (g):40.5
Pieces:1
Class:L4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):25.0±0.3
Ferrosilite (mol%):20.6±0.2
Wollastonite (mol%):1.7±0.1
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):40.5
Type spec location:PSF
Main mass:PSF
Comments:Work name CHC18052; 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)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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