[meteorite-list] Northbranch H5

From: Gary K. Foote <gary_at_meteoritecentral.com>
Date: Sun, 14 Jan 2007 18:14:30 -0500
Message-ID: <45AA7306.21976.98C797_at_localhost>

Very interesting. I did not know that altered/oxidized metals would flow like that.

Gary

On 14 Jan 2007 at 16:11, Matt Morgan wrote:

> The meteorite was cracked and then terrestrial weathering altered the
> Fe. The Fe-Ox can then flow along fractures and open spaces.
> You are probably seeing fresm metal flakes in the oxide vein.
> m
>
> Gary K. Foote wrote:
>
> >I see that now. Looking very closely it seems as though the central length of the vein
> >is shinier than that at the ends. Perhaps less oxidation there? It doesn't seem to show
> > such in the picture I have online - only under a loupe...
> >
> >Gary
> >
> >On 14 Jan 2007 at 15:53, Matt Morgan wrote:
> >
> >
> >
> >>Looking at the photo, you can see the oxide looks more like pencil lead
> >>and the unaltered Fe-Ni flakes look like chrome.
> >>There is some fresh metal along the margins of the oxide vein, however.
> >>There is alos alot of oxide rimming the unaltered Fe-Ni flakes. Again
> >>you can see the color differences.
> >>Matt
> >>
> >>Gary K. Foote wrote:
> >>
> >>
> >>
> >>>Hi Matt,
> >>>
> >>>My best view of the veins is by photography, which is not my best talent, but the
> >>>'shine' of the veins match the 'shine' of the FeNi flecks, so I am making the
> >>>assumption they are of the same minerology. I know - when I assume I make an 'ass' of
> >>>'u' and 'me'. LOL I will have to look into this further to be sure. Did you see the
> >>>closeup picture at;
> >>>
> >>>http://www.meteorite-dealers.com/images/northbranch4-2b.jpg
> >>>
> >>>It does not show it, but just now I put on my strongest glasses and used a loupe to
> >>>look closer. The vein does cross the edge of the partslice and on the opposite side
> >>>looks more like a shock vein, not being filled full with the 'shiny stuff'.
> >>>
> >>>Would FeNi flow into a shock vein during the higher temp stage of atmospheric entry?
> >>>Would hematite? I don't know how to explain this as I am relatively new to observing
> >>>details of slices and am only stating what I see.
> >>>
> >>>Any enlightenment would be very welcome.
> >>>
> >>>Gary
> >>>
> >>>On 14 Jan 2007 at 15:26, Matt Morgan wrote:
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>>Hi Gary:
> >>>>Are you certain those are Fe-Ni veins? I had a good chunk of NB and the
> >>>>only veins were Fe-Oxides, in particular, hematite. NB is a pretty
> >>>>weathered H5; I remeber it was coated with a several-mm-thick rind of
> >>>>shale and a good amount of caliche.
> >>>>Blaine Reed had/has the main mass, and it was HUGE...
> >>>>Best,
> >>>>Matt
> >>>>
> >>>>Gary K. Foote wrote:
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>>I've just received an excellent small part slice of Northbranch from the Hupe'
> >>>>>Collection. It displays some unbelievable veins of FeNi, one of which crosses the
> >>>>>whole specimen. I'm proud to have added this fine Northbranch to my collection;
> >>>>>
> >>>>>http://www.meteorite-dealers.com/northbranch.html
> >>>>>
> >>>>>Gary
> >>>>>http://www.meteorite-dealers.com
> >>>>>
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> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
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> >>>
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> >>>
> >>
> >>
> >
> >
> >
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>
Received on Sun 14 Jan 2007 06:14:30 PM PST