[meteorite-list] Monthly Favourite - September 2007

From: ensoramanda <ensoramanda_at_meteoritecentral.com>
Date: Sun, 16 Sep 2007 23:16:47 +0100
Message-ID: <46EDAB4F.7090102_at_ntlworld.com>

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



bernd.pauli at paulinet.de 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
>
>
>To: info at meteorites.com.au
> meteorite-list at meteoritecentral.com
>
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Received on Sun 16 Sep 2007 06:16:47 PM PDT