Meteoritical Bulletin: Entry for Northwest Africa 12494

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Northwest Africa 12494

Basic information

Name: Northwest Africa 12494
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12494
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 160 g

Classification
history:

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

This is 1 of 409 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 21 Sep 2019

Writeup

help

Writeup from MB 108:

Northwest Africa 12494 (NWA 12494)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite, polymict)

History: Purchased at Hamburg Mineral Show Dec. 2018.

Physical characteristics: 160.0 g irregular fragment with cm-sized light irregular patches in a dark gray-green matrix

Petrography: (R. Bartoschewitz, Bart) microgabbroic and basaltic clasts are set in a cumulate basaltic brecciates matrix. Matrix feldspar is partly transformed to maskelynite.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Pyroxene Fs_64.9±0.4Wo_2.2±0.4(n=5), Fe/Mn=30; pigeonite En₃₂Fs₆₀Wo₈(n=1); augite En_27-31Fs_49-28Wo_20-44(n=8); feldspar An₈₃Or<1 (n=13); ilmenite; SiO₂. Kamacite Ni=1.3-7.6, Co=0.8 (n=3); taenite Ni=42.2, Co=0.2 (n=1) (all wt-%). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 3.17

Classification: Achondrite (polymict eucrite)

Specimens: 20.0 g on deposit at Kiel, Bart holds the main mass.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Hamburg
Date:	P 2018
Mass (g):	160.0
Pieces:	1
Class:	Eucrite-pmict
Ferrosilite (mol%):	64.9±0.4 (n=5)
Wollastonite (mol%):	2.2±0.4
Magnetic suscept.:	3.17
Classifier:	R. Bartoschewitz
Type spec mass (g):	20.0
Type spec location:	Kiel
Main mass:	Bart
Finder:	anonymous
Comments:	NWA-RB05; submitted by R. Bartoschewitz

Institutions
and collections

Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)

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:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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