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Northwest Africa 12182
Basic information Name: Northwest Africa 12182
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12182
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 122.5 g
Classification
  history:
Recommended:  Eucrite-br    [explanation]

This is 1 of 152 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 9 Nov 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12182 (NWA 12182)

(Northwest Africa)

Purchased: 2017

Classification: HED achondrite (Eucrite, brecciated)

History: The meteorite was bought from a local meteorite dealer in Tagant, Mauritania.

Physical characteristics: Grayish individual partly covered with fusion crust.

Petrography: The meteorite is a fine-grained basaltic breccia composed of up to 2 mm sized basaltic clasts and up to 3.5 mm sized impact melt clasts set into a basaltic matrix. Mineral phases are predominantly up to 400 μm sized pyroxene and lath shaped calcic plagioclase. Pyroxene often shows magmatic zoning attesting to a low degree of thermal metamorphism. Minor phases include silica, ilmenite, chromite, and troilite. No metallic iron has been detected.

Geochemistry: low-Ca pyroxene: Fs42.3±8.3Wo4.1±1.4 (Fs30.5-54.4Wo1.9-6.3, n=11, FeO/MnO=28-39); Ca-pyroxene: Fs29.6±2.2Wo37.5±5.9 (Fs25.8-34.4Wo23.1-41.6, n=10, FeO/MnO=29-36); calcic plagioclase: An88.8±4.0 (An81.0-93.4, n=15)

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Tagant, Mauritania
Date:P 2017
Mass (g):122.5
Pieces:1
Class:Eucrite-br
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):42.3; 29.6
Wollastonite (mol%):4.1; 37.5
Classifier:A. Greshake, MNB
Type spec mass (g):20.3
Type spec location:MNB
Main mass:Marcin Cimala
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6503 approved meteorites from (Northwest Africa) (plus 2020 unapproved names)

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