[meteorite-list] Chelyabinsk - slickensides or shock planes?
From: Michael Mulgrew <mikestang_at_meteoritecentral.com>
Date: Tue, 21 May 2013 07:43:13 -0700
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
> 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,
> 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
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> Jim Wooddell
> jimwooddell at gmail.com
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Received on Tue 21 May 2013 10:43:13 AM PDT