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Northwest Africa 11763
Basic information Name: Northwest Africa 11763
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11763
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 14 g
Meteoritical Bulletin:  MB 107  (2018)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 199 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 11 May 2018
Writeup from MB 107:

Northwest Africa 11763 (NWA 11763)

(Northwest Africa)

Purchased: 2014

Classification: HED achondrite (Eucrite, brecciated)

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

Physical characteristics: Small individual almost completely covered with fusion crust.

Petrography: The meteorite displays a light greyish to whitish interior and is composed of up to 4 mm sized angular to subrounded basaltic clasts set into a fine-grained recrystallized matrix. Dominant minerals in clasts and matrix are exsolved pyroxene and calcic plagioclase. Grain sizes in the matrix are 10 to 40 μm; plagioclase laths in basaltic clasts are up to 300 μm in length. Minor phases are silica, chromite, ilmenite, and troilite. Metallic iron was not detected. Contains some thin shock melt veins.

Geochemistry: low-Ca pyroxene Fs60.9±0.5Wo2.4±0.3 (Fs59.9-61.5Wo1.9-3.0, n=14, FeO/MnO=31-35); Ca-pyroxene: Fs26.7±1.3Wo42.6±1.4 (Fs25.6-31.0Wo37.3-43.9, n=18, FeO/MnO=30-38); calcic plagioclase: An89.4±0.5 (An88.6-90.2, n=13)

Data from:
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2014
Mass (g):14
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):60.9; 26.7
Wollastonite (mol%):2.4; 42.6
Classifier:A. Greshake, MNB
Type spec mass (g):2.8
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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     This is 1 of 8025 approved meteorites from (Northwest Africa) (plus 1951 unapproved names)

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