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Northwest Africa 12283
Basic information Name: Northwest Africa 12283
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12283
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 145.5 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 425 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 12283 (NWA 12283)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Grayish fragments without fusion crust.

Petrography: The meteorite is a brecciated medium-grained basalt predominantly composed of exsolved pyroxene and often lath-shaped calcic plagioclase with average grains sizes of about 500 μm. Minor phases include silica, ilmenite, chromite, and troilite. No metallic iron has been detected.

Geochemistry: low-Ca pyroxene: Fs60.3±0.5Wo2.4±0.7 (Fs59.3-60.9Wo1.8-4.0, n=12, FeO/MnO=31-34); Ca-pyroxene: Fs26.7±0.4Wo43.4±0.7 (Fs25.7-27.4Wo41.7-44.0, n=12, FeO/MnO=29-33); calcic plagioclase: An89.9±2.1 (An86.4-92.5, n=12)

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Agadir, Morocco
Date:P 2018
Mass (g):145.5
Pieces:4
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):60.3; 26.7
Wollastonite (mol%):2.4; 43.4
Classifier:A. Greshake, MNB
Type spec mass (g):22
Type spec location:MNB
Main mass:Hanno Strufe and Andreas Gruenemeyer
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 6846 approved meteorites from (Northwest Africa) (plus 2038 unapproved names)

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