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Northwest Africa 11928
Basic information Name: Northwest Africa 11928
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11928
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 235 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 443 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 15 Sep 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11928 (NWA 11928)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Grayish individual partly covered with fusion crust.

Petrography: The meteorite is a fine-grained polymict breccia with basaltic and black melt clasts set into a clastic mineral matrix. Dominant minerals are exsolved pyroxene and calcic plagioclase with average grain sizes of about 200 μm. Minor phases include silica, chromite, FeS, fayalite, and ilmenite. No metallic Fe has been found.

Geochemistry: low-Ca pyroxene: Fs35.6±2.1Wo6.3±0.8 (Fs32.6-38.8Wo5.5-8.6, n=15, FeO/MnO=28-33); Ca-pyroxene: Fs45.0±5.7Wo31.5±4.8 (Fs43.7-46.1Wo25.4-36.6, n=11, FeO/MnO=29-35); calcic plagioclase: An93.1±3.3 (An86.4-96.4, n=12)

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2018
Mass (g):235
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):35.6; 45.0
Wollastonite (mol%):6.3; 31.5
Classifier:A. Greshake, MNB
Type spec mass (g):20
Type spec location:MNB
Main mass:Hichame Mimaghador
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum f├╝r Naturkunde, Invalidenstra├če 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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