[meteorite-list] Northbranch H5

[Gary K. Foote]

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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