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Northwest Africa 12681
Basic information Name: Northwest Africa 12681
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12681
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 129 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 442 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 27 Jun 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12681 (NWA 12681)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Single stone partly covered with fusion crust.

Petrography: The meteorite is a fine-grained largely unbrecciated basalt predominantly composed of exsolved pyroxene and often lath-shaped calcic plagioclase with mean grain sizes of about 80 μm. Minor phases include silica, ilmenite, chromite, troilite, and metallic iron.

Geochemistry: low-Ca pyroxene: Fs49.3±1.8Wo13.3±2.2 (Fs45.1-51.6Wo10.4-18.3, n=25, FeO/MnO=31-35); Ca-pyroxene: Fs36.4±0.5Wo30.0±0.4 (Fs35.6-37.0Wo29.6-30.6, n=4, FeO/MnO=33); calcic plagioclase: An88.2±2.2 (An83.2-91.3, n=15)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016
Mass (g):129
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):49.3; 36.4
Wollastonite (mol%):13.3; 30.0
Classifier:A. Greshake, MNB
Type spec mass (g):20.6
Type spec location:MNB
Main mass:anonymous
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:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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