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Northwest Africa 6485
Basic information Name: Northwest Africa 6485
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6485
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 41.3 g
Meteoritical Bulletin:  MB 100  (2012)  LL-melt rock 
Recommended:  LL-melt rock    [explanation]

This is 1 of 12 approved meteorites classified as LL-melt rock.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 1 Jul 2011
Writeup from MB 100:

Northwest Africa 6485 (NWA 6485)

(Northwest Africa)

Purchased: June 2010

Classification: Ordinary chondrite (LL, melt rock)

History: Purchased in Sainte Marie, France, in 2010.

Physical characteristics: Dark-brown, 41.3 g, with relics of fusion crust. Cut surface is dark greenish-gray and shows achondritic texture. Medium weathering grade.

Petrography: (C. A. Lorenz; Vernad) Unbrecciated, medium-grained, achondritic, with poikilitic texture. Consists of pyroxene that poikilitically encloses olivine. Minor feldspar between orthopyroxene grains. Accessory phases - chromite, FeNi metal, and troilite.

Geochemistry: (N. N. Kononkova, Vernad, EMP) Olivine Fa28.5 (Fe/Mn = 53); pyroxene En73.2Wo3.7 (Fe/Mn = 31.4); feldspar Ab82.3An12.1Or5.6. Oxygen isotopic composition (Franchi I. A., OU, Laser fluorination): δ17O 3.87; δ18O 5.15; Δ17O 1.19 (per mil).

Specimens: 9.59 g sample and one polished section are on deposit at Vernad. The anonymous buyer holds the main mass.

Data from:
  Table 1
  Line 1392:
Place of purchase:Sainte Marie, France
Date:P June 2010
Mass (g):41.3
Class:LL-melt rock
Weathering grade:moderate
Fayalite (mol%):28.5
Ferrosilite (mol%):23.1
Wollastonite (mol%):3.7
Classifier:C. A. Lorenz, Vernad
Type spec mass (g):9.59
Type spec location:Vernad
Main mass:anonymous
Comments:Submitted by C. A. Lorenz
Plots: O isotopes:  
   and collections
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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     This is 1 of 9746 approved meteorites from (Northwest Africa) (plus 1855 unapproved names)

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