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Northwest Africa 10987
Basic information Name: Northwest Africa 10987
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10987
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 480 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 179 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 17 Dec 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10987 (NWA 10987)

(Northwest Africa)

Purchased: 2015

Classification: HED achondrite (Eucrite, brecciated)

History: The meteorite was bought in 2015 from a Moroccan meteorite dealer via internet.

Physical characteristics: The individual lacks any fusion crust and shows a brownish interior.

Petrography: The meteorite is a coarse-grained breccia dominantly composed of up to 1-cm sized lithic and mineral clasts set into a fine-grained clastic matrix. Calcic plagioclase and exsolved pyroxenes are the most abundant mineral phases and are up to 1.5 mm in size. Minor phases are FeS, chromite, silica and metallic iron.

Geochemistry: low-Ca pyroxene: Fs57.9±1.0Wo5.1±1.3 (Fs55.9-59.3Wo3.1-7.3, n=19, FeO/MnO=29-31); Ca-pyroxene: Fs27.8±1.3Wo43.2±1.3 (Fs26.1-32.3Wo38.1-44.5, n=24, FeO/MnO=27-35); calcic plagioclase: An90.0±1.3 (An87.3-91.9, n=23).

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Internet
Date:P 2015
Mass (g):480
Pieces:1
Class:Eucrite-br
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):57.9; 27.8
Wollastonite (mol%):5.1; 43.2
Classifier:A. Greshake, MNB
Type spec mass (g):39.4
Type spec location:MNB (19.4 g) and UWB (20 g)
Main mass:Pawel Zareba
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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