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, Sergey On Tue, May 21, 2013 at 4:59 PM, Michael Mulgrew <[email protected]> wrote: > Bob, > > My piece is just over 5g, but it was broken off a slightly larger > piece, probably less than 50g before it broke. > > Michael in so. Cal. > > On Tue, May 21, 2013 at 7:48 AM, Bob King <[email protected]> wrote: >> Michael and all, >> I forgot to add that even small 2-3g Chelyabinsks show this same >> slick, grey material coating their broken faces. Can slickensides form >> on rocks this small? >> Bob >> >> On Tue, May 21, 2013 at 9:43 AM, Michael Mulgrew <[email protected]> wrote: >>> Bob, Jim, List, >>> >>> I have a small piece that displays the slickenside in 3 distinct >>> locations; it's definitely not secondary fusion crust. Looking >>> forward to hearing more on the subject. >>> >>> Michael in so. Cal. >>> >>> On Tue, May 21, 2013 at 7:29 AM, Jim Wooddell <[email protected]> wrote: >>>> >>>> Hi Bob and all! >>>> I might be wrong in assuming, but your slickensides sounds like you >>>> are attempting to describe secondary fusion??? >>>> >>>> We have lots of evidence in various meteorites where they broke apart >>>> for whatever reason at the weak boundaries. For example, Franconia >>>> area meteorites (some) break apart from both sides of a metal vein >>>> leaving three pieces...two chondrite fragments and an H-Metal >>>> "cornflake". >>>> It's sort of like looking at a bad weld through xray. >>>> How can you tell? Look at more and look closer. A 3D CT sort of scan >>>> that has become popular with Sutter's Mill or Dr. Agee's research on >>>> "Black Beauty" may reveal what you speak of. Just my thoughts. >>>> >>>> Kind Regards, >>>> >>>> Jim >>>> >>>> >>>> On Tue, May 21, 2013 at 7:06 AM, Bob King <[email protected]> wrote: >>>> > Hi everyone, >>>> > Many pieces of broken Chelyabinsk specimens display what appears like >>>> > fusion crust over slickensides, but is that what it really is? I've >>>> > talked with Blaine Reed and he thinks we're seeing blackish shock >>>> > veins (planes really) where the meteorite split along a line of >>>> > weakness. He even mentioned a piece he's seen where a large shock vein >>>> > in the matrix leads directly to the broken, dark face. Assuming >>>> > Chelyabinsk shows both slickensides and shock vein planes, how do you >>>> > tell them apart? >>>> > Thanks for your thoughts. >>>> > Bob >>>> > ______________________________________________ >>>> > >>>> > Visit the Archives at http://www.meteorite-list-archives.com >>>> > Meteorite-list mailing list >>>> > [email protected] >>>> > http://six.pairlist.net/mailman/listinfo/meteorite-list >>>> >>>> >>>> >>>> -- >>>> Jim Wooddell >>>> [email protected] >>>> 928-247-2675 >>>> ______________________________________________ >>>> >>>> Visit the Archives at http://www.meteorite-list-archives.com >>>> Meteorite-list mailing list >>>> [email protected] >>>> http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
