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Northwest Africa 4230
Basic information Name: Northwest Africa 4230
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4230
Observed fall: No
Year found: 2005
Country: Algeria
Mass:help 134 g
Classification
  history:
Meteoritical Bulletin:  MB 92  (2007)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 263 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 24 Jul 2007
Writeuphelp
Writeup from MB 92:

Northwest Africa 4230

Algeria

Find: December 2005

Mesosiderite

History: G. Hupé purchased this stone in December 2005 in Rissani, Morocco.

Physical characteristics: The meteorite is a single 134 g stone containing abundant metal.

Petrography: (A. Irving and S. Kuehner, UWS) In thin section, the meteorite is texturally heterogeneous, mostly fragmental with variable grainsize (0.5-4 mm) but some regions have triple junctions among silicate grains. Abundant metal (kamacite with taenite), orthopyroxene, plagioclase (some with included grains of silica polymorph and clinopyroxene), schreibersite, merrillite and troilite. One rounded clot composed of clinopyroxene, merrillite and kamacite was observed.

Mineral compositions: Orthopyroxene (Fs30.9Wo2.7-2.9, FeO/MnO = 23.9-26.2), plagioclase (An89.5-94.8Or.0.2), kamacite (Ni = 5.4 – 5.9 wt%) and taenite (Ni = 36 – 49 wt%).

Classification: Mesosiderite.

Specimens: A total of 20.1 g of sample, one polished thin section and a polished mount are on deposit at UWS. GHupé holds the main mass.

Data from:
  MB92
  Table 2
  Line 16:
Place of purchase:Rissani, Morocco
Date:Dec-2005
Mass (g):134
Pieces:1
Class:Meso
Type spec mass (g):20.1
Institutions
   and collections		 UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
Find references in NASA ADS:
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1315 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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