Meteoritical Bulletin: Entry for Northwest Africa 6057

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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: 243 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	Mesosiderite
Recommended:			Mesosiderite [explanation]

This is 1 of 273 approved meteorites classified as Mesosiderite. [show all]
Search for other: Mesosiderites, Metal-rich meteorites

Comments:

Approved 23 Jul 2016

Writeup

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: Fs_26.9±3.4Wo_1.9±0.9(Fs_18.0-34.1Wo_1.1-3.7, n=40, FeO/MnO=25-34); pigeonite: Fs_36.4±5.5Wo_8.4±2.9(Fs_28.4-46.9Wo_5.2-17.5, n=15, FeO/MnO=24-27); calcic plagioclase: An_94.3±2.0(An_91.1-96.8, 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; updated 24 Dec 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Dominik Stoeckli
Space Jewels

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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