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Northwest Africa 7599
Basic information Name: Northwest Africa 7599
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7599
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 343 g
Meteoritical Bulletin:  MB 102  (2013)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 481 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 3 Jun 2013
Writeup from MB 102:

Northwest Africa 7599 (NWA 7599)

(Northwest Africa)

Purchased: 2012

Classification: HED achondrite (Diogenite)

History: Purchased by Stefan Ralew in 2012 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Composed of larger grains separated by regions of smaller crushed grains in a cataclastic or mortar texture. Predominantly orthopyroxene with accessory clinopyroxene, anorthite, large chromite grains, stained Ni-poor metal and troilite.

Geochemistry: Orthopyroxene (Fs24.8-24.9Wo3.0-3.5, FeO/MnO = 30-34), clinopyroxene (Fs10.4Wo42.8, FeO/MnO = 22).

Classification: Diogenite. Even though the examined thin section does not contain olivine, this material is virtually identical in terms of texture, pyroxene compositions and alteration to the NWA 7464 stones (and probably is paired with them).

Specimens: 20.1 g of sample and one polished thin section are on deposit at UWB. The remaining material is held by Ralew.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2012
Mass (g):343
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):24.8-24.9; 10.4
Wollastonite (mol%):3.0-3.5; 42.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:Ralew
Comments:RA12-100; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Ralew: Stefan Ralew, Kunibertstra├če 29, 12524 Berlin, Germany; Website (private address)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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     This is 1 of 8025 approved meteorites from (Northwest Africa) (plus 1951 unapproved names)

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