header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 19 Sep 2020
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 7208
Basic information Name: Northwest Africa 7208
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7208
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 39 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  CV3
Recommended:  CV3    [explanation]

This is 1 of 538 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
Writeuphelp
Writeup from MB 100:

Northwest Africa 7208 (NWA 7208)

(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 39 g stone covered with a brown-black fusion crust.

Petrography: (M.A. Ivanova, Vernad) The meteorite consists of fine-grained matrix, chondrules to 2 mm, and abundant refractory inclusions to several mm. One big (1.5 cm) dark inclusion was found in the section. Minor phases include spinel, chromite, magnetite, sulfides, and Fe,Ni metal grains in olivine. The dark inclusion consists of smaller chondrules (< 1 mm) and their fragments, isolated olivine grains, opaques embedded in a fine-grained matrix.

Geochemistry: Olivine Fa0.44-35. Low-Ca pyroxene Fs0.68-7.0Wo0.9-4.8, plus augite and diopside in refractory inclusions. Olivine in dark inclusion is Fa0.52-53 and low-Ca pyroxene is Fs1.8-6.0Wo0.4-2.71. Oxygen isotopic compositions: (I. A Franchi and R. C Greenwood, OU, by laser fluorination): δ18O = 1.038; δ17O = -3.465, Δ17O = -4.005 (all per mil). Oxygen isotopic composition of the dark inclusion is: δ18O = 5.16, δ17O = -0.32, Δ17O = -2.72 (all per mil).

Specimens: 8.23 g and one polished section are on deposit at Vernad. The anonymous buyer holds the main mass.

Data from:
  MB100
  Table 1
  Line 1678:
Place of purchase:Tucson, USA
Date:P 2010 Feb
Mass (g):39
Pieces:1
Class:CV3
Fayalite (mol%):0.44-35
Ferrosilite (mol%):0.68-7.0
Wollastonite (mol%):0.9-4.8
Classifier:M. A. Ivanova, Vernad
Type spec mass (g):8.23
Type spec location:Vernad
Main mass:anonymous
Comments:Submitted by C. A. Lorenz
Plots: O isotopes:  
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7374 approved meteorites from (Northwest Africa) (plus 1957 unapproved names)

Direct link to this page