[meteorite-list] Chelyabinsk - slickensides or shock planes?
From: Michael Farmer <mike_at_meteoritecentral.com>
Date: Tue, 21 May 2013 10:43:56 -0500
Chelyabinsk is an incredible meteorite with so many lithologies and variations, it is almost unlike any meteorite I have ever seen. You can have 5 pieces side by side and swear all are from different meteorite falls. Some pieces are hardly recognizable as meteorites.
Many pieces exhibit amazing slickensides and most of the fragmented pieces broke along those planes. Don't forget, virtually nothing broke on impact, it was all in the massive disruptions in flight that created uncountable fragments and individuals.
The impact-melt material is basically "Cat Mountain" without the metal. The shock-melt pieces with huge glass veins are breathtaking when sliced.
Most oriented pieces are small, though a couple large ones were found. One sitting beside me at this moment:)
No meteorite collection will be complete if it lacks Chelyabinsk, especially "Binsk Berries".
On May 21, 2013, at 10:36 AM, Sergey Vasiliev <vs.petrovich at gmail.com> wrote:
> Hi Jim,
> There is a slickensides there, but very difficult to make a picture of
> it because of reflection.
> Best regards,
> On Tue, May 21, 2013 at 5:32 PM, Jim Wooddell
> <jim.wooddell at suddenlink.net> wrote:
>> Hi Sergey,
>> Those are nice pictures.
>> I see the secondary, I do not see slickenside.
>> I decided to take a look at all the samples for sale on Ebay. There is a
>> fellow there selling "slickenside" fragments. Even with those, I say look
>> I imagine you have been very busy! That's a good thing!
>> Jim Wooddell
>> On 5/21/2013 8:16 AM, Sergey Vasiliev wrote:
>>> Hi All,
>>> Look at the two pictures of the same stone.
>>> This is a fresh broken side with black shock veins on a very light matrix:
>>> - http://sv-meteorites.com/gallery/chelybinsk/02.jpg
>>> And this side is secondary crust over the shock vein:
>>> - http://sv-meteorites.com/gallery/chelybinsk/01.jpg
>>> You can find a lot of interesting things in Chelyabinsk ;-)
>>> All the best,
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Received on Tue 21 May 2013 11:43:56 AM PDT