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Northwest Africa 6308
Basic information Name: Northwest Africa 6308
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6308
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 600 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Brachinite
Recommended:  Brachinite    [explanation]

This is 1 of 62 approved meteorites classified as Brachinite.   [show all]
Search for other: Brachinites, Primitive achondrites
Comments: Approved 7 Apr 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 6308 (NWA 6308)

(Northwest Africa)

Purchased: 2009

Classification: Primitive achondrite (Brachinite)

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

Physical characteristics: Dark-brownish rock without fusion crust.

Petrography: A sawn surface of the meteorite shows up to 1 mm sized shiny crystals. It displays an equilibrium texture of equally sized olivine (about 80 vol.%) and orthopyroxene with abundant triple junctions between adjoining crystals. Along the grain boundaries symplectic exsolutions of orthopyroxene and Fe-sulfides are frequently observed. Minor phases are chromite and some phosphates.

Geochemistry: olivine: Fa28.5±0.4 (Fa27.8-29.2, n=20, FeO/MnO=63±4); low-Ca pyroxene: Fs25.4±0.1Wo2.2±0.1 (Fs25.1-25.6Wo2.0-2.3, n=20, FeO/MnO=44±3)

Classification: Mineral chemistry, high abundance of olivine, equilibrium texture and grain size are consistent with classification as brachinite.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2009
Mass (g):600
Pieces:1
Class:Brachinite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):28.5
Ferrosilite (mol%):25.4
Wollastonite (mol%):2.2
Classifier:A. Greshake, MNB
Type spec mass (g):27.2
Type spec location:MNB
Main mass:Marcin Cimala
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. 107, MAPS 55, 460-462
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Carlos Di Pietro Bella      
Robert Smart   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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