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Northwest Africa 12570
Basic information Name: Northwest Africa 12570
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12570
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 74 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 12570 (NWA 12570)

(Northwest Africa)

Purchased: 2017 May

Classification: HED achondrite (Eucrite)

Petrography: The meteorite mainly consists of pyroxene, plagioclase, silica, metal and troilite. The matrix shows a doleritic texture, in which two types of clasts can be observed. The size of pyroxene in coarse-grained clast is up to 1.8mm while those in finer-grained clasts is up to 1.4 mm. Exsolved pyroxene can be also observed. The silica polymorph (5 vol%) is mainly present in the fine-grained clasts.

Geochemistry: Low-Ca pyroxene Fs63.3±1.2Wo2.2±1.0, FeO/MnO=33.9±1.3, n=4; High-Ca pyroxene Fs28.9±1.5Wo43.2±1.4, Fe/Mn=34.2±3.0, n=4; (EPMA).

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Chenzhou, China
Date:P 2017 May
Mass (g):74
Pieces:1
Class:Eucrite
Ferrosilite (mol%):28.6±3.8; 56.7±2.2
Wollastonite (mol%):42.5±4.3; 7.8±2.6
Classifier:Peng Hao and Fanyan, IGCAS
Type spec mass (g):26.0
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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