header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 7 Nov 2019
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 6915
Basic information Name: Northwest Africa 6915
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6915
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 89.6 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 515 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 31 Jan 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 6915 (NWA 6915)

(Northwest Africa)

Purchased: Apr 2011

Classification: Ureilite

History: Purchased in 2011 April by Marc Jost from a Moroccan dealer visiting Switzerland.

Physical characteristics: A single black stone weighing 89.6 g.

Petrography: Fresh, coarse-grained, protogranular aggregate of olivine with dark, more reduced rims, rare grains of magnesian pigeonite and minor iron metal (only slightly stained by terrestrial weathering).

Geochemistry: Olivine cores Fa18.8 (Cr2O3=0.6 wt.%), rims Fa8.1; pigeonite Fs3.1-3.9Wo3.8-4.2.

Classification: Achondrite (ureilite, dunitic). This specimen is very unusual among ureilites in being a dunitic rock composed almost entirely of olivine (somewhat like LEW 86216 and clasts in JaH 422).

Specimens: A total of 18.3 g of material and one polished thin section is on deposit at UWS. Mr. G. Catterton holds the main mass.

Data from:
  MB100
  Table 1
  Line 1535:
Place of purchase:Bruegg, Switzerland
Date:P Apr 2011
Mass (g):89.6
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:low
Fayalite (mol%):18.8; 8.1
Ferrosilite (mol%):3.1-3.9
Wollastonite (mol%):3.8-4.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):18.3
Type spec location:UWS
Main mass:M. Jost
Comments: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)
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 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

Direct link to this page