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Northwest Africa 4375
Basic information Name: Northwest Africa 4375
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4375
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 12.2 g
Classification
  history:
Meteoritical Bulletin:  MB 92  (2007)  Winonaite
Recommended:  Winonaite    [explanation]

This is 1 of 35 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 24 Jul 2007
Writeuphelp
Writeup from MB 92:

Northwest Africa 4375

Northwest Africa

Find: 2005

Primitive achondrite (winonaite)

History: An anonymous finder collected the meteorite in the western part of the Sahara. The main mass holder purchased the sample at a mineral fair in Munich, Germany in 2005.

Physical characteristics: A small oval stone of 12.2 g was recovered.

Petrography: (A. Greshake, MNB). The meteorite consists of low-Ca pyroxene, Ca-pyroxene, olivine, plagioclase, metallic Fe-Ni, and troilite. Silicate grains are often euhedral and display an equigranular texture with abundant triple junctions.

Mineral compositions and geochemistry:Olivine (Fa4.4), low-Ca pyroxene (Fs5Wo1.5), Ca-pyroxene, (Fs2.3Wo46.2). Oxygen Isotopes: (I. A. Franchi and R. C. Greenwood, OU) Mean of two replicates δ17O = 2.74, δ18O = 5.88, Δ17O = -0.31 (all ‰).

Classification: Primitive achondrite (Winonaite); minimal shock, moderate weathering.

Type specimens: A total of 3.9 g of sample plus one polished thin section are on deposit at MNB. HSSH holds the main mass.

Data from:
  MB92
  Table 2
  Line 58:
Place of purchase:Munich, Germany
Date:2005
Mass (g):12.2
Pieces:1
Class:Win
Type spec mass (g):3.9
Plots: O isotopes:  
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
HSSH: Hanno Strufe, Langenbergstr. 32, 66954 Pirmasens, Germany; 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: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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