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Northwest Africa 10557
Basic information Name: Northwest Africa 10557
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10557
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 18 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  LL6
Recommended:  LL6    [explanation]

This is 1 of 2750 approved meteorites (plus 1 unapproved name) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 Feb 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10557 (NWA 10557)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (LL6)

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

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular clasts (mostly recrystallized with rare remnant chondrules) in a finer matrix.

Geochemistry: Olivine (Fa29.4-31.9, N = 3), orthopyroxene (Fs9.7Wo4.7; Fs22.7-22.9Wo1.5-1.4, N = 3), clinopyroxene (Fs10.2-10.9Wo43.7-43.2, N = 2).

Classification: Ordinary chondrite (LL6 breccia).

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

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2005
Mass (g):18
Pieces:1
Class:LL6
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):29.4-31.9
Ferrosilite (mol%):22.7-22.9
Wollastonite (mol%):1.5-1.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):18
Type spec location:PSF
Main mass:PSF
Comments:CHC 15008B; 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. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6916 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

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