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Northwest Africa 5686
Basic information Name: Northwest Africa 5686
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5686
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass:help 549 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  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 2 Feb 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 5686 (NWA 5686)

(Northwest Africa)

Purchased: 2008

Classification: HED achondrite (Eucrite, brecciated)

History: The meteorite was bought from a Moroccan meteorite dealer in 2008.

Petrography: The meteorite shows a grayish to slighly greenish interior and is brecciated. It is composed of lithic and mineral clasts set into a fine-grained clastic matrix. Clast are basaltic litholigies and impact melt fragments. Dominant minerals in clasts and matrix are exsolved pyroxene and calcic plagioclase. Minor phases include SiO2 polymorphs and chromite.

Geochemistry: low-Ca pyroxene: Fs30.6±2.2Wo4.2±1.1 (Fs26.1-33.2Wo1.9-7.7, n=41, FeO/MnO=26-36); Ca-pyroxene: Fs13±1.3Wo42±1.8 (Fs11.6-16.8Wo37.9-44.2, n=21, FeO/MnO=20-31); calcic plagioclase: An93.1±0.5 (An92.5-93.9, n=12)

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2008
Mass (g):549
Pieces:1
Class:Eucrite-br
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):30.6; 13
Wollastonite (mol%):4.2; 42
Classifier:A. Greshake, MNB
Type spec mass (g):22.5
Type spec location:MNB
Main mass:Beat Booz
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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Beat Booz   
Geography: 
Coordinates:Unknown.

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

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