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Northwest Africa 7207
Basic information Name: Northwest Africa 7207
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7207
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 92 g
Meteoritical Bulletin:  MB 100  (2012)  CV3
Recommended:  CV3    [explanation]

This is 1 of 602 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 10 Apr 2012
Writeup from MB 100:

Northwest Africa 7207 (NWA 7207)

(Northwest Africa)

Purchased: 2010 Feb

Classification: Carbonaceous chondrite (CV3)

History: One stone was purchased by an anonymous buyer in Tucson, USA, in February 2010

Physical characteristics: A 92 g stone with dark gray interior, covered by shiny black fusion crust.

Petrography: (M.A. Ivanova, Vernad) The meteorite consists of fine-grained matrix, chondrules (to 2 mm) and their fragments and refractory inclusions to several mm. Minor phases include plagioclase, spinel, chromite, sulfides, magnetite, Fe,Ni metal grains. The meteorite shows minor weathering.

Geochemistry: Olivine Fa0.34-65.5. Pyroxene is represented by low-Ca pyroxene Fs0.9-7.0Wo0.9-4.3 and augite Fs1.9-3.6Wo35-41. Oxygen isotopic compositions: (I. A Franchi and R. C Greenwood, OU, by laser fluorination): δ18O = 2.473, δ17O = -1.897, Δ17O = -3.183 (all per mil).

Classification: Carbonaceous chondrite (CV3).

Specimens: 18.47 g and one polished section are on deposit at Vernad. The anonymous buyer holds the main mass.

Data from:
  Table 1
  Line 1677:
Place of purchase:Tucson, USA
Date:P 2010 Feb
Mass (g):92
Weathering grade:minimal
Fayalite (mol%):0.34-65.5
Ferrosilite (mol%):0.9-7.0
Wollastonite (mol%):0.9-4.3
Classifier:M. A. Ivanova, Vernad
Type spec mass (g):18.47
Type spec location:Vernad
Main mass:anonymous
Comments:Submitted by C. A. Lorenz
Plots: O isotopes:  
   and collections
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)
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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