[meteorite-list] "Iron" Breccias

From: Space Rocks <spacerox_at_meteoritecentral.com>
Date: Thu Apr 22 09:53:59 2004
Message-ID: <3C5A4917.2622FB88_at_verizon.net>

I've seen Gibeons with three different etch patterns. I was told it was due to
the mass cooling in three areas and the patterns "growing" together. You can
see a slice with two patterns on my web page.

My vote for an iron breccia would be Udei Station. It is very granular looking
with at least three distinct and different types of metal visible as different
shades of gray and silver.

Rick Kujawa
http://www.spacerocks.com

Starbits_at_aol.com wrote:

> In a message dated 31-Jan-02 3:42:22 PM Pacific Standard Time,
> meteorites_at_space.com writes:
>
> << Also, when etched, the borders between the impactor and the host
> meteorite, even if it they are of the same class, would be noticed since the
> instant heat caused by the shock would not only bond the two, but mix the
> metals adjacent to the borders. >>
>
> Hello Mark
>
> Here is another example of an iron breccia - arispe. Check out the paper on
> it especially the 5th paragraph and plate XI figure 1. It is a drawing of
> the three different etch pattern directions and how they intersect.
>
> http://www.ggw.org/~ras/arispe.htm
>
> Eric Olson
> http://www.star-bits.com
>
> ______________________________________________
> Meteorite-list mailing list
> Meteorite-list_at_meteoritecentral.com
> http://www.pairlist.net/mailman/listinfo/meteorite-list
Received on Fri 01 Feb 2002 02:51:55 AM PST