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:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 7311
Basic information Name: Northwest Africa 7311
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7311
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 732 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  CO3
Recommended:  CO3    [explanation]

This is 1 of 554 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 6 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7311 (NWA 7311)

(Northwest Africa)

Purchased: 2012 Apr

Classification: Carbonaceous chondrite (CO3)

History: Purchased in Temara, Morocco by Aaronson in April 2012. Whole stone.

Petrography: (A. Irving and S. Kuehner, UWS) Unequilibrated specimen consisting of small (typically <0.3 mm) chondrules, mineral fragments and rare CAI in a matrix composed mainly of ferroan olivine, iron sulfide and minor altered kamacite.

Geochemistry: Olivine (Fa0.2-48.3; Cr2O3 in ferroan olivines = 0.06-0.09 wt.%, mean 0.07 wt.%, s.d. 0.02 wt.%, N =7), orthopyroxene (Fs2.4-6.2Wo3.0-0.6), pigeonite (Fs1.2Wo19.3), clinopyroxene in CAI (Fs0.8Wo50.1).

Classification: Carbonaceous chondrite (CO3).

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2012 Apr
Mass (g):732
Pieces:1
Class:CO3
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):0.2-48.3, n=9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1359; 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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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 7374 approved meteorites from (Northwest Africa) (plus 1957 unapproved names)

Direct link to this page