Meteoritical Bulletin: Entry for Northwest Africa 12666

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Northwest Africa 12666

Basic information

Name: Northwest Africa 12666
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12666
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass: 85.2 g

Classification
history:

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

This is 1 of 587 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 27 Jun 2019

Writeup

Writeup from MB 108:

Northwest Africa 12666 (NWA 12666)

(Northwest Africa)

Purchased: 2010

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Dark-grayish individual partly covered with fusion crust.

Petrography: The meteorite is a breccia with up to 1 cm sized 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 150 μm. Minor phases include silica, chromite, FeS, ilmenite, and metallic Fe.

Geochemistry: low-Ca pyroxene: Fs_60.9±0.5Wo_1.9±0.2(Fs_59.7-61.6Wo_1.7-2.2, n=15, FeO/MnO=28-32); Ca-pyroxene: Fs_25.8±0.8Wo_42.6±0.9(Fs_24.9-28.0Wo_40.8-44.2, n=16, FeO/MnO=27-32); calcic plagioclase: An_88.4±3.0(An_84.9-93.5, n=14)

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Agadir, Morocco
Date:	P 2010
Mass (g):	85.2
Pieces:	1
Class:	Eucrite
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	60.9; 25.8
Wollastonite (mol%):	1.9; 42.6
Classifier:	A. Greshake, MNB
Type spec mass (g):	17.5
Type spec location:	MNB
Main mass:	R. Lenssen
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)

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 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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