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Northwest Africa 6945
Basic information Name: Northwest Africa 6945
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6945
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 240 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Diogenite-pm
Recommended:  Diogenite-pm    [explanation]

This is 1 of 38 approved meteorites classified as Diogenite-pm.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 6 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 6945 (NWA 6945)

(Northwest Africa)

Purchased: 2010 May

Classification: HED achondrite (Diogenite, polymict)

History: Purchased by Kuntz from a Moroccan dealer in May 2010.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed of >90% angular diogenitic orthopyroxene, some calcic plagioclase, sparse exsolved pigeonite and rare olivine grains in a finer matrix. Several clasts (up to 5 mm across) are noritic diogenite, composed of ~80 vol.% orthopyroxene and ~20 vol.% anorthite with accessory Ti chromite, fine Ni-free metal and troilite.

Geochemistry: Orthopyroxene grains (cores Fs23.0-24.0Wo2.3-2.0; rim Fs41.3Wo2.4), orthopyroxene in noritic clast (Fs36.7-37.2Wo4.0-2.7), exsolved pigeonite (orthopyroxene host Fs 53.1Wo2.8, augite lamella Fs23.3Wo41.6), olivine grains (Fa43.3-43.6), augite grain (Fs6.0Wo43.7).

Classification: Achondrite (diogenite, polymict).

Specimens: The main mass is held by Kuntz. A total of 24 g of material and one polished thin section are on deposit at PSF.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2010 May
Mass (g):240
Pieces:2
Class:Diogenite-pm
Shock stage:low
Weathering grade:low
Fayalite (mol%):43.3-43.6
Ferrosilite (mol%):23.0-24.0; 36.7-37.2; 53.1; 23.3
Wollastonite (mol%):2.3-2.0; 4.0-2.7; 2.8; 41.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):24
Type spec location:PSF
Main mass:F. Kuntz
Comments:K170; submitted by P. Sipiera
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Franco Vignato   
Meteor-Center   
Michael S. Scherman   
Mike Markowitz   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6758 approved meteorites from (Northwest Africa) (plus 2048 unapproved names)

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