header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 14 Sep 2021
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 12293
Basic information Name: Northwest Africa 12293
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12293
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 20 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 509 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 11 Dec 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12293 (NWA 12293)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Grayish individual with some fusion crust.

Petrography: Unbrecciated coarse-grained basalt predominantly composed of exsolved pyroxene and often lath-shaped calcic plagioclase with average grains sizes of about 1 mm. Minor phases include silica, ilmenite, chromite, and barite. No metallic iron has been detected. The meteorite contains abundant shock melt veins and pockets.

Geochemistry: low-Ca pyroxene: Fs60.3±0.7Wo2.1±0.2 (Fs59.1-61.3Wo1.7-2.6, n=14, FeO/MnO=29-33); Ca-pyroxene: Fs26.4±0.3Wo42.8±0.5 (Fs25.8-26.8Wo41.9-43.6, n=15, FeO/MnO=28-32); calcic plagioclase: An90.5±0.4 (An89.8-91.4, n=15)

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Layaoune, Morocco
Date:P 2018
Mass (g):20
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):60.3; 26.4
Wollastonite (mol%):2.1; 42.8
Classifier:A. Greshake, MNB
Type spec mass (g):4.6
Type spec location:MNB
Main mass:Hichame Mimaghado
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7859 approved meteorites from (Northwest Africa) (plus 1961 unapproved names)

Direct link to this page