Meteoritical Bulletin: Entry for Northwest Africa 12681

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Northwest Africa 12681

Basic information

Name: Northwest Africa 12681
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12681
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 129 g

Classification
history:

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

This is 1 of 513 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 12681 (NWA 12681)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Single stone partly covered with fusion crust.

Petrography: The meteorite is a fine-grained largely unbrecciated basalt predominantly composed of exsolved pyroxene and often lath-shaped calcic plagioclase with mean grain sizes of about 80 μm. Minor phases include silica, ilmenite, chromite, troilite, and metallic iron.

Geochemistry: low-Ca pyroxene: Fs_49.3±1.8Wo_13.3±2.2(Fs_45.1-51.6Wo_10.4-18.3, n=25, FeO/MnO=31-35); Ca-pyroxene: Fs_36.4±0.5Wo_30.0±0.4(Fs_35.6-37.0Wo_29.6-30.6, n=4, FeO/MnO=33); calcic plagioclase: An_88.2±2.2(An_83.2-91.3, n=15)

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2016
Mass (g):	129
Pieces:	1
Class:	Eucrite
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	49.3; 36.4
Wollastonite (mol%):	13.3; 30.0
Classifier:	A. Greshake, MNB
Type spec mass (g):	20.6
Type spec location:	MNB
Main mass:	anonymous
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 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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