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

From: Derek Yoost <mineral_at_meteoritecentral.com>
Date: Wed, 22 May 2013 06:49:59 -0400
Message-ID: <8qanfwmk7idyki58vh298cnh.1369219738088_at_email.android.com>

I've also seen them in the Ochansk meteorite.

Thanks, Derek.

Meteoriteshow <meteoriteshow at free.fr> wrote:

>Yes it is. A very famous meteorite that shows great slickensides is Zag
>actually.
>
>Have all a great day!
>Frederic Beroud
>www.meteoriteshow.com
>IMCA #2491
>
>-----Message d'origine-----
>De?: meteorite-list-bounces at meteoritecentral.com
>[mailto:meteorite-list-bounces at meteoritecentral.com] De la part de Anne
>Black
>Envoy??: mardi 21 mai 2013 23:03
>??: jim.wooddell at suddenlink.net; meteorite-list at meteoritecentral.com
>Objet?: Re: [meteorite-list] Chelyabinsk - slickensides or shock planes?
>
>Does this help Jim?
>
>http://www.impactika.com/CH-126slick.jpg
>
>To me, slickensides look almost like streaks, and yes, shiny.
>Like my cat scratched it! ;-)
>
>
>Anne M. Black
>www.IMPACTIKA.com
>IMPACTIKA at aol.com
>
>
>-----Original Message-----
>From: Jim Wooddell <jim.wooddell at suddenlink.net>
>To: meteorite-list <meteorite-list at meteoritecentral.com>
>Sent: Tue, May 21, 2013 2:08 pm
>Subject: Re: [meteorite-list] Chelyabinsk - slickensides or shock
>planes?
>
>
>Welp, I just need to see one up close. But in the mean time here is a
>paper on the subject that may be of interest...
>
>http://adsabs.harvard.edu/full/1966Metic...3...31D
>
>Jim
>
>
>On 5/21/2013 10:26 AM, Michael Farmer wrote:
>> Jim, there are shock veins and slickensides. They are not the same
>thing. They
>are result of shock but not melting like the full melt veins are.
>> I have hundreds of pieces with slickensides. I am traveling so I
>can't show
>photos.
>> Perhaps later.
>> Michael Farmer
>>
>> Sent from my iPhone
>>
>> On May 21, 2013, at 12:19 PM, Jim Wooddell
><jim.wooddell at suddenlink.net>
>wrote:
>>
>>> Hi Jim Baxter,
>>> And, that is what I am not seeing. I'am going to be a very hard
>sell on the
>term slickensides until I see something that scientifically supports it
>and why
>it is there. Do the threads actually appear and are they threads??
>>> In my mind, the coming apart part would not create a slickenside
>(cool state)
>where as the coming together with great pressure and time would. Just
>thinking
>out loud, not qualified to say one way or the other!
>>> I also see where this appearance is shown lower in topography in
>it's area
>which, to me, would be odd for slickenside.
>>>
>>> Cheers!
>>>
>>> Jim Wooddell
>>>
>>>
>>>
>>>
>>> On 5/21/2013 9:18 AM, Jim Baxter wrote:
>>>> Slickensides are polished surfaces caused by lateral movement along
>a fault
>plane. In hand specimens they feel rough when you rub your finger in
>one
>direction and smooth when you rub it in the other. Not sure that test
>would be
>feasible on the size specimens most of us own. In theory if the fault
>planes
>represent planes of weakness along which breaks occur then you could be
>seeing
>both things - slickensides that formed by lateral movement along the
>shock plane
>when the stone fractured.
>>>>
>>>> Jim Baxter
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>
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Received on Wed 22 May 2013 06:49:59 AM PDT