In a message dated 1/14/2007 4:29:43 P.M. Central Standard Time,
[EMAIL PROTECTED] writes:
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
Subject: Re: [meteorite-list] Northbranch H5
In a message dated 1/14/2007 4:29:43 P.M. Central Standard Time,
[EMAIL PROTECTED] writes:
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
Hi Bernd and List,
= Anyway, it is nice to hear someone say excellent, unbelievable,
= proud and fine all in the same description with Northbranch.
= Are there any *ugly* meteorites?
There are ugly meteorites! In fact, last Halloween I offered and sold The
World's Ugliest Halloween
Very nice Mark. Curiously my specimen is quite black within, but does show
heavy
weathering on the two outer edges of surface. Perhaps the dark black nature of
my
specimen is due to its small size and was cut from an area of deep black matrix.
Gary
On 14 Jan 2007 at 23:24, MARK BOSTICK
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
Gary proudly writes:
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.
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
Thank you Bernd,
I have not seen shock veins fill with metal before and don't know if such is a
possibility. There are many other, finer threads of metal showing also in this
specimen.
More shock veins do you think? What mechanism would/could cause such an
effect?
Best,
Gary
On 14 Jan
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
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
Thank you Matt,
I am now looking at specimens of both online and, of what I have seen, Portales
Valley is
very spectacular. This is the pic that caught my eye in the Monnig Museum;
http://monnigmuseum.tcu.edu/media/hi-res-downloads/meteorite-portales-valley.jpg
It shows shock veins and
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:
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
Hello Gary, All,
When I started collecting meteorites, Northbranch was one of the lowest
costing chondrites on the market. It was even less then the at the new
(classified) NWA meteorites. Every show I seemed to bring a large slice
home. I have since sold 2-3 kg. of the meteorite and
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