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Northwest Africa 12704
Basic information Name: Northwest Africa 12704
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12704
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 47.7 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 12704 (NWA 12704)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Single stone partly covered by fusion crust.

Petrography: The meteorite is an unbrecciated coarse-grained basaltic rock predominantly composed of exsolved pyroxene and more blocky calcic plagioclase with average grain sizes of about 2 mm. Minor phases include silica, chromite, and troilite. No metallic iron has been found.

Geochemistry: low-Ca pyroxene: Fs45.9±0.4Wo2.1±0.3 (Fs45.0-46.4Wo1.7-2.5, n=18, FeO/MnO=29-32); Ca-pyroxene: Fs19.2±0.6Wo42.3±1.2 (Fs18.3-21.0Wo39.3-44.5, n=18, FeO/MnO=24-27); calcic plagioclase: An91.6±0.4 (An90.9-92.3, n=14)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2019
Mass (g):47.7
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):45.9; 19.2
Wollastonite (mol%):2.1; 42.3
Classifier:A. Greshake, MNB
Type spec mass (g):9.5
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 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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