[meteorite-list] Chelyabinsk - slickensides or shock planes?

From: Michael Mulgrew <mikestang_at_meteoritecentral.com>
Date: Tue, 21 May 2013 07:43:13 -0700
Message-ID: <CAMseTy0r8v_CVb7q2foOEKMF1qBLSLg_9RFJK=GopBH0sg11cQ_at_mail.gmail.com>

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 <jimwooddell at gmail.com> 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 <nightsky55 at gmail.com> 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
> > Meteorite-list at meteoritecentral.com
> > http://six.pairlist.net/mailman/listinfo/meteorite-list
>
>
>
> --
> Jim Wooddell
> jimwooddell at gmail.com
> 928-247-2675
> ______________________________________________
>
> Visit the Archives at http://www.meteorite-list-archives.com
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
Received on Tue 21 May 2013 10:43:13 AM PDT