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Northwest Africa 4304
Basic information Name: Northwest Africa 4304
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4304
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 23 g
Classification
  history:
Meteoritical Bulletin:  MB 92  (2007)  Ureilite-pmict
Recommended:  Ureilite-pmict    [explanation]

This is 1 of 32 approved meteorites classified as Ureilite-pmict.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 24 Jul 2007
Writeuphelp
Writeup from MB 92:

Northwest Africa 4304

Northwest Africa

Find: 2004

Achondrite (ureilite, polymict)

History: An anonymous finder reovered the specimen in the western part of the Sahara. C. Anger purchased the meteorite in Baden, Austria in 2004.

Physical characteristics: Eighteen small fragments totaling 22.97 g were recovered.

Petrography: (A. Greshake, MNB and M. Kurz, Kurz). The meteorite is a polymict breccia with lithic and mineral clasts set into a ureilitic matrix dominated by large olivine and pigeonite crystals. Lithic clasts include ureilite material and chondritic lithologies with recognizable chondrule fragments. The meteorite contains diamonds.

Mineral compositions and geochemistry: Ureilite material: Olivine (Fa1.1-22.4), pyroxene (Fs17.8Wo5.3). Chondritic lithologies: Olivine (Fa13.6-20.4), pyroxene (Fs12.9-14.4).

Classification: Achondrite (ureilite, polymict); extensive shock, moderate weathering.

Type specimens: A total of 4.6 g plus one polished thin section are on deposit at MNB. Anger holds the main mass.

Data from:
  MB92
  Table 2
  Line 28:
Place of purchase:Baden, Austria
Date:2004
Mass (g):22.97
Pieces:18
Class:Ure
Type spec mass (g):4.6
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Anger: Christian Anger, Korngasse 6, 2405 Bad Deutsch-Altenburg, Austria; Website (private address)
Kurz: M. Kurz, Schillerstrasse 7, D-34626 Neukirchen, Germany (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Austromet   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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