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Northwest Africa 11837
Basic information Name: Northwest Africa 11837
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11837
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 218 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  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 4 Jul 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11837 (NWA 11837)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Brownish individual with some fusion crust.

Petrography: Unbrecciated medium-grained basaltic rock predominantly composed of exsolved pyroxene and often lath-shaped calcic plagioclase with average grains sizes of about 600 μm. Minor phases include silica, ilmenite, chromite, troilite, and metallic iron.

Geochemistry: low-Ca pyroxene: Fs62.6±0.6Wo6.6±0.7 (Fs61.4-63.2Wo5.5-8.0, n=13, FeO/MnO=25-29); Ca-pyroxene: Fs34.4±0.2Wo39.6±0.3 (Fs34.1-34.8Wo39.1-40.1, n=14, FeO/MnO=26-30); calcic plagioclase: An88.1±0.5 (An87.2-88.9, n=13)

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):218
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):62.6; 34.4
Wollastonite (mol%):6.6; 39.6
Classifier:A. Greshake, MNB
Type spec mass (g):29.3
Type spec location:MNB
Main mass:Philippe Schmitt-Kopplin
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. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

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

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