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Re: Geo vs Astro chemistry was Asteroid, Comet, etc. question

Darryl,

You are referring to Disko Island basalt, which I believe got its
iron reduced while flowing over coal beds.  I've heard that
some individual masses of iron are really big, but most of what
I've seen is quite disseminated in the rock (like a chondrite!).
Here's one of the first references to this terrestrial, native iron
occurrence:

Steenstrup, Knud Johan Vogel, On the nonmeteoric origin of the masses
of metallic iron in the basalt of Disko in Greenland, Mineralogical
Magazine, p. 143-148, 1877.

At 05:07 PM 11/22/99 , you wrote:

>-----Original Message-----
>From: Bernd Pauli HD <bernd.pauli@lehrer1.rz.uni-karlsruhe.de>
>To: E. L. Jones <jonee@epix.net>
>Cc: Troy Bell <tankman1@sprynet.com>; meteorite-list@meteoritecentral.com
><meteorite-list@meteoritecentral.com>
>Date: Monday, November 22, 1999 1:24 PM
>Subject: Re: Geo vs Astro chemistry was Asteroid, Comet, etc. question
>
>
>Yes, 20 years or so ago I had a piece or two of supposed terrestrial native
>iron from somewhere like Greenland or Iceland.  There were little mm sized
>globs of native iron scattered in a greenish solid rock.  Could still be a
>piece of it around here somewhere, but dunno where.          Darryl
>
>
> >"E. L. Jones" schrieb:
> >
> >> Iron and Nickel can rarely be found together on earth ... rarely
> >> is iron found in "native" form but when it is, it is product of
> >> human industry.
> >> Matter of factly -- I don't think you will ever find native (pure)
> >> iron from a natural source on earth. Any time you find it it on
> >> the earth it will be from human activities OR extra-terresterial.
> >
> >This reminds me of the  O v i f a k  iron masses (35 tons) that still
> >keep scientists mystified. Whereas some consider them meteoritic:
> >
> >(a) because they were found in the same area as the Cape York irons
> >(b) because of their relatively high nickel content, ...
> >
> >others group them with the pseudometeorites.
> >
> >Best regards,
> >
> >Bernd
> >
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Dr. Jeffrey N. Grossman       phone: (703) 648-6184
US Geological Survey          fax:   (703) 648-6383
954 National Center
Reston, VA 20192, USA


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