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Northwest Africa 6057
Basic information Name: Northwest Africa 6057
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6057
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 243 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 188 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 23 Jul 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 6057 (NWA 6057)

(Northwest Africa)

Purchased: 2009

Classification: Mesosiderite

History: The meteorite was bought in 2009 from a Moroccan meteorite dealer on a mineral fair in Berne, Switzerland.

Petrography: The meteorite is composed of a metal (about 40 vol%) and silicate (about 60 vol%) portion. The silicate portion dominantly consists of up to 2 mm sized igneous orthopyroxene, clinopyroxene and calcic plagioclase; minor phases include troilite and silica. Virtually all FeNi metal has been altered to Fe-oxides.

Geochemistry: low-Ca pyroxene: Fs26.9±3.4Wo1.9±0.9 (Fs18.0-34.1Wo1.1-3.7, n=40, FeO/MnO=25-34); pigeonite: Fs36.4±5.5Wo8.4±2.9 (Fs28.4-46.9Wo5.2-17.5, n=15, FeO/MnO=24-27); calcic plagioclase: An94.3±2.0 (An91.1-96.8, n=20)

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Berne, Switzerland
Date:P 2009
Mass (g):243
Pieces:10
Class:Mesosiderite
Shock stage:low
Weathering grade:W4
Ferrosilite (mol%):26.9; 36.4
Wollastonite (mol%):1.9; 8.4
Classifier:A. Greshake, MNB
Type spec mass (g):24.4
Type spec location:MNB
Main mass:Marc Jost
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Andreas Grünemeyer   
Dominik Stoeckli   
Space Jewels   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6968 approved meteorites from (Northwest Africa) (plus 2012 unapproved names)

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