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Northwest Africa 7307
Basic information Name: Northwest Africa 7307
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7307
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 80.2 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  CK4
Recommended:  CK4    [explanation]

This is 1 of 105 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 6 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7307 (NWA 7307)

(Northwest Africa)

Purchased: 2012 Feb

Classification: Carbonaceous chondrite (CK4)

History: Purchased by Gary Fujihara in February 2012 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Composed of abundant, well-formed, separated chondrules in a recrystallized matrix containing stained chromian magnetite.

Geochemistry: Olivine (Fa29.3±0.0), orthopyroxene (Fs24.8-25.0Wo0.6). Three separate olivines analyzed by EMPA have identical compositions within error.

Classification: Carbonaceous chondrite (CK4).

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2012 Feb
Mass (g):80.2
Pieces:1
Class:CK4
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):29.3┬▒0.0, n=3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):16.1
Type spec location:UWB
Main mass:G. Fujihara
Comments:GF12-2; 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:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Andreas Gr├╝nemeyer   
Public domain photographs:
Gary Fujihara   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6984 approved meteorites from (Northwest Africa) (plus 2008 unapproved names)

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