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Northwest Africa 6425
Basic information Name: Northwest Africa 6425
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6425
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 1169 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL3.5
Recommended:  LL3.5    [explanation]

This is 1 of 22 approved meteorites classified as LL3.5.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 6 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 6425 (NWA 6425)

Northwest Africa

Purchased: 2010 Oct

Classification: Ordinary chondrite (LL3.5)

Petrography: (A. Irving and S. Kuehner, UWS) Large (1 mm), well-formed chondrules and sparse dark inclusions (one is a stained very fine grained chondrite) in a stained matrix. Minerals are olivine, orthopyroxene, subcalcic augite, augite, sodic plagioclase, chromite, altered kamacite and troilite.

Geochemistry: Olivine (Fa0.6-31.2, n=8. Cr2O3 in ferroan olivine = 0.02-0.08 wt.%, mean 0.06, s.d. 0.02, N = 6), orthopyroxene (Fs1.8-24.7Wo1.0-0.2), subcalcic augite (Fs14.6Wo28.4), augite (Fs8.5Wo44.2).

Classification: Ordinary chondrite (LL3.5). Subtype estimated from Cr2O3 distribution in ferroan olivine based on histograms (Fig. 4) in Grossman and Brearley (2005).

Bibliography:
  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2010 Oct
Mass (g):1169
Pieces:1
Class:LL3.5
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):0.6-31.2, n=8
Ferrosilite (mol%):1.8-24.7
Wollastonite (mol%):1.0-0.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):26.9
Type spec location:UWB
Main mass:J. Schrader
Comments:JS10-2; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7354 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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