[meteorite-list] A new Ni-rich ungrouped ataxite : NWA 6167

From: Fabien Kuntz <wwmeteorites_at_meteoritecentral.com>
Date: Tue, 22 Jun 2010 06:36:50 +0000 (GMT)
Message-ID: <987134.97525.qm_at_web23302.mail.ird.yahoo.com>

Hello list,

after a presentation in Ensisheim, I offer here for sale the four last
specimens of my newest iron, NWA 6167, ungrouped ataxite, TKW 500g :

NWA 6167 : This is a Ni-rich ataxite showing a very homogeneous metal made of a
very fine intergrowth of Ni-rich and Ni-poor metal arranged into a
"micro-Widmanstatten" pattern. Sub-millimetric globules made of a
very fine intergrowth of Ni-rich metal, Ni-poor metal, schreibersite, chromite and
troilite are relatively frequent. They probably represent shock-melted
sulfides. Several interesting inclusions, prevailing olivine and low-Ca
pyroxene and subordinate plagioclase, high-Ca pyroxene, Ca-phosphate and
chromite, are present in this meteorite. It is ungrouped and very high in Ni
and Co but also in Ge, Re, W, Ir and Pt. The only two meteorites somewhat
resembling 6167 are the ungrouped Ni-rich ataxites Babb's Mill (Troost's Iron)
and South Byron. Looking at the external surface, it seems that this meteorite
has some fusion crust preserved.

Available specimens are complete slices :

27.09g
27.49g with the largest silicated inclusions (3 of circa 5-6mm each)
27.54g

Also available, the main mass, an nose-shaped endcut, of this oriented iron, 95.5g...
Exemple of

a slice (expertly etched and pictured by Mirko Graul) :

http://i64.servimg.com/u/f64/09/04/34/12/20100410.jpg

Fabien Kuntz
M?t?orites (ventes, expertise, conf?rences)
Animation scientifique et technique
WWMETEORITES (Siret : 511 850 612 00017)
www.wwmeteorites.com



      
Received on Tue 22 Jun 2010 02:36:50 AM PDT