header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 Aug 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 12741
Basic information Name: Northwest Africa 12741
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12741
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 85.2 g
Classification
  history:
Recommended:  Diogenite    [explanation]

This is 1 of 426 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 27 Jul 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12741 (NWA 12741)

(Northwest Africa)

Purchased: 2019

Classification: Diogenite-pmict

History: The meteorite was purchased from a local meteorite dealer in Zagora, Morocco.

Physical characteristics: Single stone with some fusion crust.

Petrography: The meteorite is a polymict breccia predominantly composed of up to 2 mm sized low-Ca pyroxene and plagioclase grains set into fine-grained related matrix. Diogenetic pyroxene shows some augite exsolution lamellae. Very rarely eucritic regions are encountered. Minor phases include silica, chromite, FeS, and metallic Fe.

Geochemistry: diogenetic pyroxene: Fs35.0±0.4Wo2.0±0.1 (Fs34.3-35.6Wo1.8-2.1, n=13, FeO/MnO=27-31); augite exsolutions: Fs13.4±0.4Wo44.2±0.5 (Fs13.0-14.3Wo43.0-44.8, n=14, FeO/MnO=22-27); eucritic low-Ca pyroxene: Fs57.6±0.7Wo1.8±0.5 (Fs56.5-58.8Wo1.3-3.2, n=11, FeO/MnO=32-35); eucritic Ca-pyroxene: Fs26.4±1.2Wo40.8±1.3 (Fs24.3-28.8Wo37.0-42.3, n=15, FeO/MnO=30-36); calcic plagioclase: An92.9±0.3 (An92.3-93.6, n=15)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2019
Mass (g):85.2
Pieces:1
Class:Diogenite-pmict
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):57.6; 26.4; 35.0; 13.4
Wollastonite (mol%):1.8; 40.8; 2.0; 44.2
Classifier:A. Greshake, MNB
Type spec mass (g):17.2
Type spec location:MNB
Main mass:Fabien Kuntz
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

Direct link to this page