Meteoritical Bulletin: Entry for Northwest Africa 12569

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Northwest Africa 12569

Basic information

Name: Northwest Africa 12569
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12569
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 90 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	Eucrite
Recommended:			Eucrite [explanation]

This is 1 of 603 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 23 Dec 2019

Writeup

Writeup from MB 108:

Northwest Africa 12569 (NWA 12569)

(Northwest Africa)

Purchased: 2017 May

Classification: HED achondrite (Eucrite)

Petrography: Breccia with coarse-grained clasts in a finer-grained matrix. The matrix shows a doleritic texture. The size of pyroxene in the clasts is up to 2.4 mm while those in fine-grained matrix is up to 1.8 mm. The dominant minerals of the meteorite are plagioclase and pyroxene. Accessory mineral includes chromite, troilite and metal. Exsolution of the high calcium pyroxene from the low calcium pyroxene can be also observed.

Geochemistry: Low-Ca pyroxene Fs_59.5±0.9, Wo_3.1±1.3, n=7, FeO/MnO=34.0±6.7, n=10; High-Ca pyroxene Fs_27.6±3.5Wo_42.7±3.4, n=5; Plagioclase An_85.4±4.5, n=7 (EDAX).

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Chenzhou, China
Date:	P 2017 May
Mass (g):	90
Pieces:	1
Class:	Eucrite
Ferrosilite (mol%):	27.6±3.5; 59.5±0.9
Wollastonite (mol%):	42.7±3.4; 3.1±1.3
Classifier:	Peng Hao and Fanyan, IGCAS
Type spec mass (g):	26.3
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 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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