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Northwest Africa 6489
Basic information Name: Northwest Africa 6489
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6489
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 3.2 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 422 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 23 Oct 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 6489 (NWA 6489)

(Northwest Africa)

Purchased: Jun 2010

Classification: HED achondrite (Diogenite)

History: A stone was purchased by Giorgio Tomelleri at Sainte Marie, France.

Physical characteristics: A 3.2 g angular stone with smooth faces. Surface is brown with dark weathered patches.

Petrography: (C. A. Lorenz, Vernad) The meteorite has brecciated texture and consists of 0.5-1.5 mm mineral clasts (80 vol%) embedded in a fine-grained clastic matrix (20 vol%). Pyroxene dominant mineral phase; olivine is minor; accessory phases include feldspar, chromite, troilite, and FeNi metal. Locally, large mineral fragments are joined by fine-grained (10 μm) aggregate of pyroxene and feldspar.

Geochemistry: (N. N. Kononkova, Vernad) Pyroxene En75.6-81.9Wo0.4-1.0 (Fe/Mn=25-30); olivine Fo76.7-89.7 (Fe/Mn ranges from 46 to 30); oxygen isotope composition (I. Franchi, R. Greenwood, OU, Laser fluorination): δ17O=1.598, δ18O=3.504, Δ17O=-0.226 (all per mil).

Classification: Diogenite

Specimens: A total of 2.95 g main mass sample and one thin polished section are on deposit at Vernad.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Sainte Marie, France
Date:P Jun 2010
Mass (g):3.2
Pieces:1
Class:Diogenite
Fayalite (mol%):14.2 (10.3-23.3)
Ferrosilite (mol%):19.4 (17.2-23.6)
Wollastonite (mol%):0.9 (0.4-1.1)
Classifier:C. Lorenz, Vernad
Type spec mass (g):2.95
Type spec location:Vernad
Main mass:Vernad
Finder:anonymous
Comments:Submitted by C.A. Lorenz
Plots: O isotopes:  
Institutions
   and collections
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6752 approved meteorites from (Northwest Africa) (plus 2052 unapproved names)

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