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Northwest Africa 12933
Basic information Name: Northwest Africa 12933
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12933
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 370 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 449 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 23 Dec 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12933 (NWA 12933)

(Northwest Africa)

Purchased: May 2017

Classification: HED achondrite (Eucrite)

Petrography: The meteorite belongs to a breccia with a doleritic texture.The dominant mineral of the meteorite is plagioclase and pyroxene (up to 2.2 mm). Accessory ilmenite and troilite can be observed. Exsolution of the high calcium pyroxene from the low calcium proxene can be also observed.

Geochemistry: Low-Ca pyroxene Fs59.5±1.4, Wo3.5±1.1, n=7, FeO/MnO=34.4±3.2, n=8; High-Ca pyroxene Fs26.2±2.2, Wo45.0±2.2, n=7; Plagioclase An88.8±3.3, n=9 (EDAX).

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Chenzhou, China
Date:P May 2017
Mass (g):370
Pieces:1
Class:Eucrite
Ferrosilite (mol%):59.5±1.4
Wollastonite (mol%):3.5±1.1
Classifier:Peng Hao and Fanyan, IGCAS
Type spec mass (g):21.4
Type spec location:IGCAS
Main mass:Shi Zhiqiang
Comments:Submitted by Li shijie
Institutions
   and collections
IGCAS: Institute of Geochemistry Chinese Academy of Sciences, Guiyang, China (institutional address; updated 27 Mar 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7100 approved meteorites from (Northwest Africa) (plus 2005 unapproved names)

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