header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 20 Jan 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 7012
Basic information Name: Northwest Africa 7012
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7012
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 42.8 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 344 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 23 Apr 2012
Writeuphelp
Writeup from MB 100:

Northwest Africa 7012 (NWA 7012)

(Northwest Africa)

Purchased: Sept 2011

Classification: HED achondrite (Eucrite, polymict)

Petrography: Fresh polymict breccia consisting of some coarse basaltic eucrite clasts plus related crystal debris and sparse diogenitic orthopyroxene and fayalitic olivine. Orthopyroxene, fayalite, exsolved pigeonite, very calcic plagioclase, olivine, ilmenite and troilite.

Geochemistry: Orthopyroxene (Fs37.6-37.9Wo2.0, Fe/Mn=35), fayalite (Fa87.0, Fe/Mn=42), olivine (Fa37.6-37.9, Fe/Mn=46-47). Pigeonite consists of host orthopyroxene (Fs56.7Wo4.1, Fe/Mn=29-33) with exsolution lamellae of clinopyroxene (Fs23.2-23.8Wo43.4-42.5, Fe/Mn=26-28).

Data from:
  MB100
  Table 1
  Line 1573:
Place of purchase:Denver
Date:P Sept 2011
Mass (g):42.8
Pieces:1
Class:Eucrite-pmict
Shock stage:low
Weathering grade:low
Fayalite (mol%):37.6-37.9; 87.0
Ferrosilite (mol%):37.6-37.9; 56.7; 23.2-23.8
Wollastonite (mol%):2.0; 4.1; 43.4-42.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):8.6
Type spec location:UWS
Main mass:DPitt
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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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 7101 approved meteorites from (Northwest Africa) (plus 2004 unapproved names)

Direct link to this page