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Northwest Africa 11949
Basic information Name: Northwest Africa 11949
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11949
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 280 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 472 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 15 Sep 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11949 (NWA 11949)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite)

History: The meteorite was purchased from a local meteorite dealer in Laâyoune, Western Sahara.

Physical characteristics: Greyish individual partly covered with fusion crust.

Petrography: The meteorite is an unbrecciated basalt predominantly composed of exsolved pyroxene and mostly lath-shaped calcic plagioclase with average grain sizes of about 300 μm. Several regions of the rock have a pronounced spherulitic appearance due to sprays of pyroxene and plagioclase. Minor phases include silica, ilmenite, chromite, and troilite. No metallic iron has been detected.

Geochemistry: low-Ca pyroxene: Fs57.7±0.3Wo1.9±0.3 (Fs57.1-58.1Wo1.6-2.9, n=14, FeO/MnO=33-35); Ca-pyroxene: Fs23.7±0.3Wo44.6±0.5 (Fs23.3-24.6Wo43.2-45.1, n=14, FeO/MnO=29-35); calcic plagioclase: An81.8±2.5 (An76.9-84.7, n=10)

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Laayoune, Western Sahara
Date:P 2018
Mass (g):280
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):57.7; 23.7
Wollastonite (mol%):1.9; 44.6
Classifier:A. Greshake, MNB
Type spec mass (g):21.9
Type spec location:MNB
Main mass:Abdeltif Mechaguen
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 7374 approved meteorites from (Northwest Africa) (plus 1957 unapproved names)

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