Hi Bernd & Ruben,
The problem with a Ureilite is that I believe metallic iron/nickel is in
relatively small amounts in them. It usually forms small veinlets around the
grains and are the first thing to weather away (low nickel content) and
often lost in slicing too. Because of this only VERY fresh Ureilites
generally have these.
http://www.meteorites.com.au/features/nwa2705.html
NWA 2624 for comparison:
http://www.meteorites.com.au/features/nwa2624.html
Cheers,
Jeff
----- Original Message -----
From: <[email protected]>
To: [email protected]
Sent: Tuesday, October 06, 2009 9:32 AM
Subject: [meteorite-list] A Rare Arizona Meteorite Find
Ruben wrote: Ureilite maybe?
Hi Ruben and List,
Yes, maybe a ureilite like the Hupés' NWA 2624 but where are the triple
junctions?
You would expect a lot of olivine grains with "sets" of three olivine grains
that meet
in triple junctions of 120° (3 x 120° = 360°).
Bernd
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