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Northwest Africa 7728
Basic information Name: Northwest Africa 7728
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7728
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 44 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  R4
Recommended:  R4    [explanation]

This is 1 of 67 approved meteorites classified as R4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 12 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7728 (NWA 7728)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Rumuruti chondrite (R4)

History: Purchased by Gary Fujihara in February 2013 from a dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh breccia consisting of clasts with well-formed, separated chondrules and abundant sulfides.

Geochemistry: Olivine (Fa41.0-42.4; FeO/MnO = 76-86), clinopyroxene (Fs10.5-10.6Wo46.2-46.4).

Classification: R4 chondrite.

Specimens: A total of 21.8 g of material and one polished thin section are on deposit at UWB. Mr. G. Fujihara holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2013 Feb
Mass (g):44
Pieces:1
Class:R4
Shock stage:S2
Weathering grade:low
Fayalite (mol%):41.0-42.4
Ferrosilite (mol%):10.5-10.6
Wollastonite (mol%):46.2-46.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):8.8
Type spec location:UWB
Main mass:G. Fujihara
Comments:M1495; submitted by A. Irving
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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

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

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