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Northwest Africa 12878
Basic information Name: Northwest Africa 12878
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12878
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 5.1 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 513 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 Oct 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12878 (NWA 12878)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Small dark greyish fragment with some fusion crust.

Petrography: The meteorite is a polymict breccia with fine- and coarse-grained basaltic clasts set into a clastic matrix predominantly composed of exsolved pyroxene and calcic plagioclase of highly variable grain sizes. Minor phases include silica, chromite, FeS, ilmenite, zircon, and some kamacite. The meteorite contains shock melt veins.

Geochemistry: low-Ca pyroxene: Fs61.8±0.4Wo2.2±0.5 (Fs60.8-62.2Wo1.8-3.4, FeO/MnO=32-37, n=12); Ca-pyroxene: Fs27.3±0.4Wo43.6±0.4 (Fs26.5-28.2Wo42.9-44.4, FeO/MnO=31-36, n=14); calcic plagioclase: An87.8±4.0 (An79.5-91.0, n=15)

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Errachidia, Morocco
Date:P 2019
Mass (g):5.1
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):61.8; 27.3
Wollastonite (mol%):2.2; 43.6
Classifier:A. Greshake, MNB
Type spec mass (g):1.1
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; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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