On the specimens I have/had, the Fe-Ox "wind" or "snake" through the piece. I never saw one actual Fe-Ni vein in any piece of Northbranch. I am not saying there are none, but yours look like Fe-Ox. The Fe in the meteorite has oxidized to form hematite, so the hematite is not primary. Shock veins are typically straight to curvilinear; look at Etter TX. It has the best Fe shock veins I have ever seen...or does Portales Valley? :) Have fun looking, cool stuff! 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 >>> >>>______________________________________________ >>>Meteorite-list mailing list >>>[email protected] >>>http://six.pairlist.net/mailman/listinfo/meteorite-list >>> >>> >>> >>> >>> >>> >> >> > > > >______________________________________________ >Meteorite-list mailing list >[email protected] >http://six.pairlist.net/mailman/listinfo/meteorite-list > > > > ______________________________________________ Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
