[meteorite-list] Dhofar 908 3-lithology photo

From: Dave Schultz <indy1996_at_meteoritecentral.com>
Date: Mon, 4 Jun 2007 15:36:01 -0700 (PDT)
Message-ID: <348830.91185.qm_at_web52904.mail.re2.yahoo.com>

  Sorry to intrude on your discussion once again on
Dho 908 and also changing the subject a bit, but I
think one of my favorite lunar slices has to be NWA
3333 that Norbert has on his web site. Seems to me
from my uneducated eye, that this particular lunar
slice has more than one lithologies, but I`m probably
wrong. Can we get an explanation on this one to extend
this fascinating subject a while longer and possibly a
photo for everyone to see?
                                              Dave




> Hi David, and All,
>
> Stephan's photo shows another section through the 81
> main mass of Dhofar
> 908, and it's actually one of the very few pieces
> that has all three major
> lithologies. The three lithologies are spatially
> separated in the main mass,
> with one end consisting mostly of a clast poor,
> brownish IMB similar to
> Dhofar 305, while the middle of the stone mainly
> consists of a clast rich
> IMB with large anorthositic and other lithic
> fragments as can be seen in the
> lower part of my favourite slice, and which is
> similar to Dhofar 306, and
> other pairings:
>
> http://www.meteoris.de/img/ncc-lun/Dho908-2.54g.JPG
>
> The upper, dark part seems to be a more mature
> regolith breccia, something
> that is consistent with cosmogenic nuclides studies
> by Kuni Nishiizumi.
> Speaking of that, this is a very old meteorite, and
> only one lunar meteorite
> has a even higher terrestrial age, Dhofar 025 &
> pairings. According to Kuni
> Nishiizumi's studies, Dhofar 908 has a terrestrial
> age of approximately
> 350,000 years, placing its fall into lower
> palaeolithic times, and the reign
> of Homo erectus rather than Homo sapiens.
>
> Back to Stephan's slice: it has another special
> feature to the lower right -
> that large round redish clast seems to be a
> troctolite, and it's most
> similar to large clasts in Dhofar 310. I won't call
> this a fourth lithology
> because it's "just" a clast, but it's rather
> fascinating, though. Nice!
>
> All the best,
> Norbert
>
>
> -----Urspr?ngliche Nachricht-----
>
>
> Hello All,
>
> This List is amazing at times. I asked if there was
> a photo from the
> "Rosetta Stone" of Dhofar 908 showing the 3
> lithologies, and Stephan
> Kambach very kindly sent me one. It's a beauty too!
> I have it displayed
> on my webpage at the bottom along with his
> explanation of the various
> components -- be sure to click the photo for a
> greatly magnified view.
> It's a must see.
>
> http://meteoritestudies.com/protected_DHOF908.HTM
>
> Thanks Stephan (and Norbert for finding it).
>
> David
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Received on Mon 04 Jun 2007 06:36:01 PM PDT