Meteoritical Bulletin: Entry for Northwest Africa 5892

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Northwest Africa 5892

Basic information

Name: Northwest Africa 5892
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5892
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 530 g

Classification
history:

Recommended:

Brachinite [explanation]

This is 1 of 57 approved meteorites classified as Brachinite. [show all]
Search for other: Brachinites, Primitive achondrites

Comments:

Approved 26 Mar 2022

Writeup

Writeup from MB 111:

Northwest Africa 5892 (NWA 5892)

(Northwest Africa)

Purchased: 2009

Classification: Primitive achondrite (Brachinite)

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

Physical characteristics: Brownish fragment with minor fusion crust.

Petrography: The meteorite shows an equilibrated texture of 50 to 400 µm sized olivine and subordinate low-Ca pyroxene grains that often meet at 120° grain boundaries. Minor phases include troilite and FeNi metal ocurring interstitial between and as blebby inclusions in silicate grains. Grain boundaries are often decorated with seondary Fe-oxides and -hydroxides. No plagioclase was found.

Geochemistry: olivine: Fa_28.7±0.3(Fa_28.1-29.0, FeO/MnO=70±8, n=7); Ca-pyroxene: Fs_9.4±0.1Wo_43.9±0.2(Fs_9.2-9.6Wo_43.6-44.3, FeO/MnO=33±3, n=7)

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2009
Mass (g):	530.3
Pieces:	1
Class:	Brachinite
Shock stage:	S1
Weathering grade:	moderate
Fayalite (mol%):	28.7
Ferrosilite (mol%):	9.4
Wollastonite (mol%):	43.9
Classifier:	A. Greshake, MNB
Type spec mass (g):	24
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. 111, in preparation (2022)

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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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