Meteoritical Bulletin: Entry for Northwest Africa 11933

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Northwest Africa 11933

Basic information

Name: Northwest Africa 11933
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11933
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 65.7 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	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 31 Aug 2018

Writeup

Writeup from MB 107:

Northwest Africa 11933 (NWA 11933)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite)

History: The meteorite was bought from a Moroccan meteorite dealer at a mineral fair in Ensisheim, France.

Physical characteristics: Greyish individual with some patches of fusion crust.

Petrography: The meteorite is an unbrecciated medium-grained basalt predominantly composed of exsolved pyroxene and calcic plagioclase with average grain sizes of about 500 μm. Pyroxene appears brownish in plane polarized light. Minor phases include silica, ilmenite, chromite, troilite, and metallic iron.

Geochemistry: low-Ca pyroxene: Fs_58.5±0.6Wo_2.8±0.7(Fs_56.9-59.2Wo_2.3-4.5, n=11, FeO/MnO=28-31); Ca-pyroxene: Fs_29.1±1.7Wo_40.5±1.9(Fs_27.7-33.5Wo_36.0-41.9, n=10, FeO/MnO=27-31); calcic plagioclase: An_89.9±0.8(An_89.5-90.7, n=13)

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Ensisheim, France
Date:	P 2018
Mass (g):	65.7
Pieces:	1
Class:	Eucrite
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	58.5; 29.1
Wollastonite (mol%):	2.8; 40.5
Classifier:	A. Greshake, MNB
Type spec mass (g):	14.3
Type spec location:	MNB
Main mass:	Hanno Strufe
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. 107, MAPS 55, 460-462

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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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