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Northwest Africa 8509
Basic information Name: Northwest Africa 8509
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8509
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 272 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 509 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 14 Sep 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8509 (NWA 8509)

(Northwest Africa)

Purchased: March 2014

Classification: HED achondrite (Eucrite)

Petrography: The meteorite displays a dark grayish to almost black interior and is heavily brecciated. Eucritic clasts and fine-grained matrix are dominantly composed of exsolved pyroxene and calcic plagioclase. Minor phases are SiO2 polymorphs and chromite. Wide regions of the rock appear to be shock melted and partly recrystallized. Pairing with NWA 8036 seems likely.

Geochemistry: low-Ca pyroxene: Fs49.1±8.3Wo3.6±1.1 (Fs35.9-59.7Wo2.2-5.6, n=21), FeO/MnO=27-35; Ca-pyroxene: Fs25.8±2.9Wo40.6±1 (Fs22.8-30.7Wo38.7-42.1, n=12), FeO/MnO=27-34; calcic plagioclase: An90.5±0.5 (An89.6-91.4, n=20)

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P March 2014
Mass (g):272
Pieces:4
Class:Eucrite
Shock stage:strong
Weathering grade:moderate
Ferrosilite (mol%):49.1; 25.8
Wollastonite (mol%):3.6; 40.6
Classifier:A. Greshake, MNB
Type spec mass (g):22.5
Type spec location:MNB
Main mass:Hanno Strufe and Andreas Gruenemeyer
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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7859 approved meteorites from (Northwest Africa) (plus 1961 unapproved names)

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