Meteoritical Bulletin: Entry for Northwest Africa 5889

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Northwest Africa 5889

Basic information

Name: Northwest Africa 5889
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5889
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass: 6.2 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	Winonaite
Recommended:			Winonaite [explanation]

This is 1 of 87 approved meteorites classified as Winonaite. [show all]
Search for other: Primitive achondrites, Winonaites

Comments:

Approved 10 Mar 2020

Writeup

Writeup from MB 109:

Northwest Africa 5889 (NWA 5889)

(Northwest Africa)

Purchased: 2008

Classification: Primitive achondrite (Winonaite)

History: The meteorite was purchased from a meteorite dealer in Besancon, France.

Physical characteristics: Three small brownish fragments without fusion crust.

Petrography: The meteorite displays an equilibrated texture with abundant 120° triple junctions. Low-Ca pyroxene is the most abundant phase with forsteritic olivine, augite, and feldspar grains being subordinate. Grain sizes are typically 100 to 200 μm. Minor phases include kamacite, schreibersite, and troilite. Contains veinlets of metal or Fe-oxide throughout. No chondrules were observed.

Geochemistry: olivine: Fa_4.6±0.1(Fa_4.4-4.8, FeO/MnO=27±3, n=12); low-Ca pyroxene: Fs_6.8±0.2Wo_1.8±0.1(Fs_6.3-7.1Wo_1.6-2.0, FeO/MnO=29±6, n=12); Ca-pyroxene: Fs_2.6±0.2Wo_45.6±0.3(Fs_2.4-2.9Wo_45.2-46.2, n=7); feldspar: An_12.4±1.2Ab_84.9±1.0Or_2.7±0.3, n=9

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Besancon, France
Date:	P 2008
Mass (g):	6.2
Pieces:	3
Class:	Winonaite
Shock stage:	low
Weathering grade:	moderate
Fayalite (mol%):	4.6
Ferrosilite (mol%):	6.8; 2.6
Wollastonite (mol%):	1.8; 45.6
Classifier:	A. Greshake, MNB
Type spec mass (g):	1.3
Type spec location:	MNB
Main mass:	Fabien Kuntz
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

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

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

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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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