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Northwest Africa 11947
Basic information Name: Northwest Africa 11947
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11947
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 70 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 11947 (NWA 11947)

(Northwest Africa)

Purchased: 2018

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Dark greyish individual with some fusion crust.

Petrography: The meteorite is a coarse-grained breccia composed of up to 1 cm sized basaltic clasts set into a clastic matrix. Mineral phases are predominantly up to 1 mm sized pyroxene and lath shaped calcic plagioclase. Pyroxene is compositionally zoned with rims being more Fe- and Ca-rich than cores indicating a low degree of thermal metamorphism. Minor phases include silica, ilmenite, chromite, troilite, zircon and fayalite. No metallic iron has been detected.

Geochemistry: pyroxene cores: Fs34.2±4.4Wo9.3±3.1 (Fs30.0-40.1Wo6.7-14.3, n=12, FeO/MnO=26-30); pyroxene rims: Fs60.7±6.7Wo24.5±3.2 (Fs42.0-66.2Wo20.5-30.4, n=12, FeO/MnO=29-41); calcic plagioclase: An85.5±2.5 (An81.0-88.7, n=13)

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2018
Mass (g):70
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):34.2; 60.7
Wollastonite (mol%):9.3; 24.5
Classifier:A. Greshake, MNB
Type spec mass (g):14.2
Type spec location:MNB
Main mass:Harald Stehlik
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Stehlik: Harald Stehlik, 1220 Wien, Austria (private address)
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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