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Northwest Africa 12711
Basic information Name: Northwest Africa 12711
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12711
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 39.3 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 431 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12711 (NWA 12711)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Two fragments partly covered with fusion crust.

Petrography: The meteorite is a coarse-grained monomict basaltic breccia predominantly composed of esxolved pyroxene and calcic plagioclase grains up to 2.5 mm in size. Minor phases include silica, chromite, ilmenite, and metallic iron. The meteorite contains several shock melt veins.

Geochemistry: low-Ca pyroxene: Fs59.7±0.6Wo2.1±0.4 (Fs558.4-60.9Wo1.6-3.0, n=18, FeO/MnO=29-33); Ca-pyroxene: Fs25.8±0.4Wo43.3±0.6 (Fs25.1-26.6Wo42.0-44.2, n=15, FeO/MnO=27-33); calcic plagioclase: An88.9±0.5 (An88.2-90.2, n=15)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):39.3
Pieces:2
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):59.7; 25.8
Wollastonite (mol%):2.1; 43.3
Classifier:A. Greshake, MNB
Type spec mass (g):8
Type spec location:MNB
Main mass:Martin Goff
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. 108, in preparation (2019)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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