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Re: Vaca Muerta Etch Pattern
- To: meteorite-list@meteoritecentral.com
- Subject: Re: Vaca Muerta Etch Pattern
- From: Martin Horejsi <martinh@isu.edu>
- Date: Wed, 29 Apr 1998 22:03:49 -0600
- In-Reply-To: <3547A4F1.6BE658AA@lehrer1.rz.uni-karlsruhe.de>
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- Resent-Date: Thu, 30 Apr 1998 00:05:26 -0400 (EDT)
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Hello Bernd and all,
Here is a link to my Pinnaroo picture in the Gallery of the Meteorite
Exchange. It is quite an interesting specimen, but I don't know if any of
the patterns are true widmanstattens or just some interesting plate
boundaries.
http://www.meteorite.com/gallery/pinnaroo.htm
Also, here is a link to some of my Glorietta Mountain pictures. These two
pictures show a distinct pattern at the boundary of the olivine crystals
common to pallasites.
http://www.meteorite.com/gallery/glorieta_mountain.htm
Martin
>It's late here in Germany (about 23:58 p.m.) so I only glanced at my
>database to see if there is any other MES with a Widmannstätten pattern.
>You will know that they are common in a PAL like BRENHAM but what about
>mesosiderites?
>I found PINNAROO (39.4 kg) whose metal shows a Widmanstätten structure,
>too. The analysis of the PINNAROO metal yields a value of 9.66 % Ni,
>which is a lot of nickel for a mesosiderite (normal value: minimum 6%
>and maximum 10% Ni - exception: Chaunskij 14.37 % Ni => ungrouped iron;
>the metal displays a mesosiderite structure; maybe a highly
>metamorphosed mesosiderite).
>
>Regards, Bernd
References: