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Northwest Africa 7604
Basic information Name: Northwest Africa 7604
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7604
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 46 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  LL7
Recommended:  LL7    [explanation]

This is 1 of 60 approved meteorites classified as LL7.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 23 May 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 7604 (NWA 7604)

(Northwest Africa)

Purchased: 2012

Classification: Ordinary chondrite (LL7)

History: Purchased by Stefan Ralew in 2012 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Fairly fresh specimen with poikiloblastic texture characterized by multiple, very small olivine chadacrysts enclosed within larger orthopyroxene oikocrysts, together with subordinate clinopyroxene, sodic plagioclase, kamacite and troilite.

Geochemistry: Olivine (Fa28.6-28.9, N = 3), orthopyroxene (Fs22.9-23.2Wo4.5-3.3, N = 3), clinopyroxene (Fs10.7-11.7Wo43.4-43.2, N = 2).

Classification: Ordinary chondrite (LL7).

Specimens: 9.8 g including one polished thin section at UWB. The remaining material is held by Ralew.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2012
Mass (g):46
Pieces:1
Class:LL7
Shock stage:low
Weathering grade:W1
Fayalite (mol%):28.6-28.9
Ferrosilite (mol%):22.9-23.2
Wollastonite (mol%):4.5-3.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):9.8
Type spec location:UWB
Main mass:S. Ralew
Comments:RA12-105; 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)
Ralew: Stefan Ralew, Kunibertstra├če 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6984 approved meteorites from (Northwest Africa) (plus 2008 unapproved names)

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