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Northwest Africa 7324
Basic information Name: Northwest Africa 7324
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7324
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 4.49 kg
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  EH-melt rock
Recommended:  EH-melt rock    [explanation]

This is 1 of 7 approved meteorites classified as EH-melt rock.   [show all]
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), Enstatite-rich meteorites, and Melted chondrites
Comments: Approved 27 Jan 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 7324 (NWA 7324)

(Northwest Africa)

Purchased: 2012

Classification: EH-melt rock

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

Physical characteristics: A group of dark brown, dense stones comprising two larger pieces (one 3250 g) and many small fragments (total 4490 g). Fresh interiors are black with abundant metal and sulfide visible, and the specimens emit a very strong sulfurous smell upon cutting.

Petrography: (A. Irving and S. Kuehner, UWS) Entire specimen consists of a fine grained aggregates of highly magnesian silicates and abundant metal and sulfides with no interstitial glass. Minerals are euhedral enstatite, some forsterite, ragged grains of Si-bearing metal, rare euhedral graphite laths, Cr-bearing troilite, niningerite and rare oldhamite. Portions of the matrix consist of silica-rich glass (K-bearing) containing tiny crystals of a very Si-rich mineral (silica or possibly sinoite). A few relict chondrules were observed.

Geochemistry: Enstatite (Fs0.4-0.7Wo0.3-0.9, N = 3), forsterite (Fa0.5, N = 1), metal (Si = 2.5 wt.%, Ni = 6.6 wt.%).

Classification: EH-melt rock.

Specimens: A total of 20.6 g of type material and one polished thin section are on deposit 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):4490
Pieces:25
Class:EH-melt rock
Shock stage:S6
Weathering grade:W1
Fayalite (mol%):0.5
Ferrosilite (mol%):0.4-0.7
Wollastonite (mol%):0.3-0.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.6
Type spec location:UWB
Main mass:S. Ralew
Comments:RA12-23; 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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
bphd   
Geography: 
Coordinates:Unknown.

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

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