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Northwest Africa 6975
Basic information Name: Northwest Africa 6975
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6975
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 226 g
Classification
  history:
Recommended:  Eucrite-br    [explanation]

This is 1 of 160 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 6975 (NWA 6975)

(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: Fragmental breccia composed of up to 2 cm sized basaltic and impact melt clasts set into a fine-grained clastic matrix. Basaltic clasts and matrix are dominantly composed of exsolved pyroxene and often lath-shaped calcic plagioclase grains ranging from 20 to 500 µm. Minor phases include chromite, ilmenite, silica, and FeS. No metallic iron has been detected.

Geochemistry: low-Ca pyroxene: Fs59.7±1.3Wo5.2±1.2 (Fs57.6-63.0Wo1.8-6.5, n=12, FeO/MnO=26-30); Ca-pyroxene: Fs29.6±0.8Wo41.6±0.9 (Fs28.3-31.1Wo39.6-42.9, n=20, FeO/MnO=25-32); calcic plagioclase: An89.2±4.8 (An81.8-94.2, n=20)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2011
Mass (g):226
Pieces:1
Class:Eucrite-br
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):59.7; 29.6
Wollastonite (mol%):5.2; 41.6
Classifier:A. Greshake, MNB
Type spec mass (g):20.6
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:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6741 approved meteorites from (Northwest Africa) (plus 2032 unapproved names)

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