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Northwest Africa 4889
Basic information Name: Northwest Africa 4889
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4889
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 420 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 258 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 12 Mar 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 4889 (NWA 4889)

(Northwest Africa)

Purchased: 2005

Classification: Mesosiderite

History: The meteorite was purchased in 2005 from a local meteorite dealer in Zagora, Morocco.

Physical characteristics: Fourteen dark-brownish fragments without fusion crust.

Petrography: The meteorite is a breccia composed of silicate and metallic regions of highly variable portions. The metallic lithology consists of kamacite and taenite, the silica fraction is dominated by up to 2 µm sized low-Ca pyroxene, less abundant olivine, calcic plagioclase and minor silica and merrillite. Pyroxene often shows compositional zoning.

Geochemistry: olivine: Fa9.2±0.7 (Fa8.2-10.6, n=20, FeO/MnO=32-47); low-Ca pyroxene: Fs34.6±3.9Wo7.0±2.0 (Fs30.0-40.6Wo4.9-10.8, n=15, FeO/MnO=20-25); calcic plagioclase: An93.5±0.3 (An93.0-94.0, n=15)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2005
Mass (g):420
Pieces:14
Class:Mesosiderite
Shock stage:low
Weathering grade:low
Fayalite (mol%):9.2
Ferrosilite (mol%):34.6
Wollastonite (mol%):7
Classifier:A. Greshake, MNB
Type spec mass (g):20.3
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9370 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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