Hi Bernd/all,
NWA 3118 is also one of my favourite purchases...very colourful....but
my recent 146g carbonacious end cut from Dean is a stunner...I still
have to get some good shots of it and spend more time with it under the
microscope...but it too is crammed tight with chondrules of all colours
and sizes. It has a CAI measuring 10mm x 12mm which also appears to
travel through from the cut surface to the rear outer thunbprinted
surface about the same distance. There are another 4 CAIs over 5mm and a
strange mid grey oval inclusion about 12mm long and almost featureless
(not sure what it is).
I will try and get some detailed shots of it. It features on Deans main
website page (bottom left)
http://www.meteoriteshop.com/index.html
All the best,
Graham Ensor Nr Barwell UK
[EMAIL PROTECTED] wrote:
www.meteorites.com.au/favourite/september2007.html
This is surely an awesome CV3 chondrite that is full of surprises
and I am glad I purchased 6 specimens, 4 of which have these DI's.
Of special interest is the DI in Jeff's 1.55-gram complete slice.
Like my 4.97-gram specimen, it shows a comminuted matrix of very
small, distorted chondrules and mineral fragments and a medium-gray
rim that maybe represents shock-melted material. This rim is virtually
devoid of chondrules and only shows tiny mineral debris.
Jeff, have you already emailed Ted Bunch? Does he have some thoughts
on these DI's?
BTW, my 11.51-gram NWA 3118 features one of the most massive CAI's
(9.5 x 4 mm) I've ever seen in any of my carbonaceous chondrites with
the exception of the ones Eric Olsen sold some time ago - NWA 2140 ...
unfortunately not classified yet. One of the pieces from Eric has a CAI
measuring even 9.5 x 7.5 mm!
Another interesting feature of my 11.51-gram slice is that both chondrules
+ massive CAI show what is called "preferred orientation" and almost all
these chondrules are - just like this CAI - slightly or perceptibly oval.
Cheers,
Bernd
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