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Northwest Africa 6972
Basic information Name: Northwest Africa 6972
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6972
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 150 g
Classification
  history:
Recommended:  Eucrite-br    [explanation]

This is 1 of 164 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 10 Mar 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 6972 (NWA 6972)

(Northwest Africa)

Purchased: 2011

Classification: HED achondrite (Eucrite, brecciated)

History: The meteorite was purchased in 2011 from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: Greyish individual partly covered with fusion crust.

Petrography: The meteorite is a fragmental breccia composed of rare basaltic clasts and abundant impact melt clasts set into a fine-grained clastic matrix. Basaltic clasts and matrix are dominantly composed of exsolved pyroxene and calcic plagioclase grains of variable grain sizes ranging from 20 to 400 µm. Several matrix pyroxenes display magmatic zoning. Minor phases include chromite, ilmenite, fayalite, silica, and metallic iron. The meteorite is highly shocked with plagioclase being completely converted into maskelynite.

Geochemistry: low-Ca pyroxene: Fs38.2±11.8Wo3.1±1.5 (Fs21.8-59.4Wo1.6-5.3, n=32, FeO/MnO=23-31); Ca-pyroxene: Fs17.0±3.0Wo44.6±1.5 (Fs15.5-27.0Wo39.8-45.7, n=12, FeO/MnO=19-27); calcic plagioclase: An91.6±2.0 (An86.8-94.4, n=25)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2011
Mass (g):150
Pieces:1
Class:Eucrite-br
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):38.2; 17.0
Wollastonite (mol%):3.1; 44.6
Classifier:A. Greshake, MNB
Type spec mass (g):20.2
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
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)
Andreas Grünemeyer   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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