header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 May 2022
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 231
Basic information Name: Northwest Africa 231
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 231
Observed fall: No
Year found: 2000
Country: (Northwest Africa)
Mass:help 1054 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L5
Recommended:  L5    [explanation]

This is 1 of 8266 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 2 Jul 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 231 (NWA 231)

(Northwest Africa)

Found: 2000

Classification: Ordinary chondrite (L5)

History: Michael Cottingham acquired the sample from a meteorite prospector in 2000 and the main mass was later sold to John Cabassi.

Physical characteristics: One sub-rounded 1054 g stone, with desert patina.

Petrography: (A. Love, App): Sample displays recrystallized chondritic texture crosscut by subparallel shock veins and fractures. Chondrules not well defined, have flattened oblate shapes, irregular boundaries, lack glassy mesostasis and have an average diameter of 1.10 mm.

Specimens: Five slices weighing 25.96 g, a polished mount with approximately 2.5 g and a thin section are currently on deposit at App.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:2000
Mass (g):1054
Pieces:1
Class:L5
Shock stage:S3
Weathering grade:W5
Fayalite (mol%):24.1±0.4, N=15
Ferrosilite (mol%):20.7±0.9, N=9
Wollastonite (mol%):1.6±0.2, N=9
Classifier:A. Love, App
Type spec mass (g):25.96
Type spec location:App
Main mass:John Cabassi
Finder:anonymous
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
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 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

Direct link to this page