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Northwest Africa 7854
Basic information Name: Northwest Africa 7854
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7854
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 2.64 kg
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 393 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 29 May 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7854 (NWA 7854)

(Northwest Africa)

Purchased: 2013

Classification: HED achondrite (Eucrite, polymict)

Petrography: The light grayish rock consists of basaltic and melt-clasts set into a fine-grained clastic matrix dominated by calcic plagioclase and exsolved pyroxene. Accessories include SiO2, chromite, and troilite. Contains 2 to 3 vol% diogenitic material.

Geochemistry: low-Ca px: Fs35.5-47.9Wo1.3-4; FeO/MnO=28-32; Ca-px: Fs18-32.2Wo24-44.7; FeO/MnO=25-31; clacic plagioclase: An85.3-92.2.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2013
Mass (g):2640
Pieces:1
Class:Eucrite-pmict
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):35.5-47.9; 18-32.2
Wollastonite (mol%):1.3-4; 24-44.7
Classifier:A. Greshake, MNB
Type spec mass (g):27.4
Type spec location:MNB
Main mass:Marcin Cimala
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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)
Cosimo Damiano Gorgoglione   
Franco Vignato   
Jörg-Florian Jensch   
METEORITICON      
Piotr gural100   
Ziyao Wang      
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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