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Northwest Africa 5891
Basic information Name: Northwest Africa 5891
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5891
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 16.9 g
Classification
  history:
Recommended:  Pallasite    [explanation]

This is 1 of 56 approved meteorites classified as Pallasite.   [show all]
Search for other: Metal-rich meteorites, Pallasites
Comments: Approved 10 Mar 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 5891 (NWA 5891)

(Northwest Africa)

Purchased: 2005

Classification: Pallasite

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

Physical characteristics: Brownish fragment without fusion crust.

Petrography: The meteorite is composed of up to 1 cm sized subrounded and partly fragmented olivine grains surrounded by a matrix of brownish iron oxides which are also present along the olivine grain boundaries and cracks. Contains some Cr-bearing troilite; no pristine FeNi-metal was detected.

Geochemistry: olivine: Fa7.5±0.1 (Fa4.4-4.8, FeO/MnO=37±3, n=11)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Midelt, Morocco
Date:P 2005
Mass (g):16.9
Pieces:1
Class:Pallasite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):7.5
Classifier:A. Greshake, MNB
Type spec mass (g):3.4
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)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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