[meteorite-list] Tackling The Mysterious Portales Valley

From: David Weir <dgweir_at_meteoritecentral.com>
Date: Thu Apr 22 10:01:32 2004
Message-ID: <3D050D13.9CFF1781_at_earthlink.net>

Hello Mark,

Glad you found my Portales Valley page, I have been adding to it ever
since it was first published. In fact, looking in the NASA ADS
Abstracts, there are dozens of published papers about Portales.

http://adsabs.harvard.edu/abstract_service.html

Of course if you don't already have Acrobat Reader, you will need to
download this free program to be able to read .pdf files, which all of
these are saved as.

http://www.adobe.com/products/acrobat/readstep.html

>From the ADS Abstract page, just type inside the text box, Portales
Valley, and click Send Query. Then click on the full articles whenever
possible.

What I consider the most interesting fact about Portales is not that
it's an impact breccia, but that the large metal veins are from a
different, earlier iron impactor, a IAB iron, in contrast to the smaller
IIE-type veins.

Let us know what you learn.

David



Mark Fox wrote:
>
> May 10, 2002
>
> Greetings Mr Rhett Bourland and Fellow Meteorite
> Enthusiasts!
>
> Good grief! What an "unearthly" meteorite Portales
> Valley really is! I just finished reading Meteorite
> Studies by Mr. David Weir, the link to which was
> kindly given to me by Mr. Ken Newton. It even was
> mentioned there that there are many similarities
> between this meteorite and my favorite, "Rose City"!
> It looks like I will not be done anytime soon with
> pondering this meteoritic subject, among my many
> others!
>
> According to Meteorite Studies, it appears that
> Portales Valley is indeed brecciated! If I read
> right, David refers to the "stony" portions as the
> impact melt areas. Is this correct?
>
> Also, is there anymore easy-to-obtain information
> regarding Portales Valley that someone knows of?
>
> The questions that I asked in my last post were just a
> precursor regarding this H6 unordinary chondrite. I
> was going to use the data to propose a possible
> problem regarding one of the formation theories. When
> time permits, and only if I still see the problem, I
> will post it for all to comment.
>
> Long strewn fields!
>
> Mark Fox
> Newaygo, MI USA
>
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Received on Mon 10 Jun 2002 04:33:23 PM PDT