[meteorite-list] Black Onaping (was: Shatter Cone)

From: Larry Atkins <thetoprok_at_meteoritecentral.com>
Date: Fri, 14 Jan 2011 11:33:33 -0500
Message-ID: <8CD821FEB4D8A7E-1568-75FE_at_webmail-d014.sysops.aol.com>

Dan, Bernd, All,

One needs to look closely to see the metal. In fact it wasn't really
visible until I gave it a good polish.

A little trick I have for determining if the metal or sulphide in a
rock is responsible for the magnetic attraction is to take a tiny chip
off a rare earth or neodymium magnet and scoot it around with a
toothpick, looking to see if it jumps from grain to grain. If you do
this with a rock that's magnetic and has visible pyrite in it, you will
see the magnet jump away from the metallic material, (pyrite). Only
rarely does it jump from metal grain to metal grain. This Black Onaping
is one of those rare exceptions.

Sincerely,
Larry Atkins

IMCA # 1941
Ebay?alienrockfarm


-----Original Message-----
From: Dan Wray <daniel_wray at comcast.net>
To: Bernd V. Pauli <bernd.pauli at paulinet.de>;
meteorite-list at meteoritecentral.com
Sent: Fri, Jan 14, 2011 10:40 am
Subject: Re: [meteorite-list] Black Onaping (was: Shatter Cone)


Bernd and all,?
?
I have a large collection of impactites from all over the world, yes
they were caused by meteoritic impact but few have material
identifiable from the impactor. My Monturaqui contains visible metallic
grains but I had never thought to check my other impactites. Thus far I
have only found one other and that is a slice of Ternovka, a black
material that is quite magnetic. I would be interested to have others
check their collections for this feature.?
?
Dan?
----- Original Message ----- From: "Bernd V. Pauli"
<bernd.pauli at paulinet.de>?
To: <meteorite-list at meteoritecentral.com>?
Sent: Friday, January 14, 2011 4:41 AM?
Subject: [meteorite-list] Black Onaping (was: Shatter Cone)?
?
> Hello Larry, Dan, and List,?
>?
>> I do wonder about the metal in the Onaping.?
>> Typically, is there metal in Onaping??
>?
>> I pulled out my slice of Black Onaping, it is indeed?
>> magnetic in certain spots. This is a revelation.?
>?
> No wonder Black Onaping material is magnetic given the fact?
> that the Sudbury Structure is the result of a meteorite impact.?
>?
> In other words, Black Onaping contains sulfides and nickel(-iferous)?
> inclusions ... hence magnetic!?
>?
> Best wishes,?
>?
> Bernd?
>?
>?
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Received on Fri 14 Jan 2011 11:33:33 AM PST