header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 13 Nov 2018
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 12193
Basic information Name: Northwest Africa 12193
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12193
Observed fall: No
Year found: 2018
Country: Western Sahara
Mass:help 241 g
Classification
  history:
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 329 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 9 Nov 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12193 (NWA 12193)

Western Sahara

Purchased: May 2018

Classification: HED achondrite (Eucrite, polymict)

History: Found in Gdeim Asham, Western Sahara, February 2018. Purchased by Darryl Pitt in Mauritania, May 2018.

Physical characteristics: Single stone, with weathered exterior. A saw cut reveals a fragmental breccia of lithic clasts set in a light colored, fine-grained groundmass.

Petrography: (C. Agee) Microprobe examination of a polished mount shows a mixture of unequilibrated, zoned pyroxenes and equilibrated pyroxenes with exsolution lamellae, leading to the conclusion that there are at least two distinct eucrite lithologies present.

Geochemistry: (C. Agee, UNM) Pyroxene Fs48.1±14.0Wo10.7±7.3, Fe/Mn=31±5, n=13; plagioclase An87.9±4.7, n=4.

Classification: Polymict eucrite

Specimens: 21.9 g including a probe mounts on deposit at UNM, DPitt holds the main mass.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P May 2018
Mass (g):241
Pieces:1
Class:Eucrite-pmict
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):48.1±14.0
Wollastonite (mol%):10.7±7.3
Classifier:C. Agee, UNM
Type spec mass (g):21.9
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MVCH-354; submitted by C. Agee, UNM
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Western Sahara
Coordinates:Unknown.

Statistics:
     This is 1 of 192 approved meteorites from Western Sahara (plus 19 unapproved names)

Direct link to this page