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Northwest Africa 11520
Basic information Name: Northwest Africa 11520
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11520
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 75 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 190 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 Dec 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11520 (NWA 11520)

(Northwest Africa)

Purchased: 2017

Classification: HED achondrite (Eucrite, brecciated)

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

Physical characteristics: Dark-grayish individual with patches of fusion crust.

Petrography: The meteorite is a fine-grained breccia composed of basaltic and dark impact melt clasts set into a basaltic matrix. Dominant minerals in basaltic lithologies are pyroxene with fine exsolution lamellae and calcic plagioclase laths up to 300 µm in length. Minor phases include silica, chromite, ilmenite, fayalite, troilite, and metallic iron. The meteorite contains several shock melt veins.

Geochemistry: low-Ca pyroxene: Fs63.4±3.3Wo7.3±3.5 (Fs58.0-67.5Wo2.9-13.3, n=15, FeO/MnO=29-34); Ca-pyroxene: Fs44.8±3.7Wo28.7±4.3 (Fs40.2-50.7Wo21.4-34.1, n=16, FeO/MnO=29-37); calcic plagioclase: An82.9±1.9 (An78.9-86.5, n=15)

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2017
Mass (g):75
Pieces:1
Class:Eucrite-br
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):63.4; 44.8
Wollastonite (mol%):7.3; 28.7
Classifier:A. Greshake, MNB
Type spec mass (g):15
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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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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