[meteorite-list] Re: Meteorite-list Digest, Vol 26, Issue 30 (Schoner's theory) Tektites
From: drtanuki <drtanuki_at_meteoritecentral.com>
Date: Tue Feb 14 00:31:28 2006
Dear Steve, Norm and List Members,
I posed a question to D. Futrell some 10 years ago
concerning comet formation of tektites. I asked him
if it was possible that a comet could have entered
Earth`s atmosphere and left behind glass from melted
silicates from both the comet and Earth entrained dust
plasma ( I and others have found Ni/Fe spherules in
tektite as well as Earth? zircons). At the time I was
studying glassy fusion crusts found on high silicate
meteorites. He basically said that this was total
Another point, the tektites must have cooled at a
relatively slow rate because the glass is free of
stress. Glasses cooled rapidly contain internal
stresses that lead the glass to shatter easily; thus
man-made glasses require being kept at a slow cooling
rate to eliminate internal stress and breakage.
Enigma! Dirk Ross..Tokyo
--- Norm Lehrman <nlehrman_at_nvbell.net> wrote:
> Everything sounds fine till that last couple of
> paragraphs where every other proposal also stumbles.
> Just where is all this silicate material in our
> or atmosphere? I still see a mass balance problem.
> I'm open for a good answer, but if you just
> it, I didn't understand.
> --- Steve Schoner <schoner_at_mybluelight.com> wrote:
> > My theory on tektite formation:
> > Go back to the impacts of cometary material on
> > Jupiter in July of 1994. I think in this there is
> > clear demonstration of how tektites are formed.
> > There were huge plumes of plasma extending out
> > space, and large dark clouds of re-condensed dust
> > from the impacts after-wards.
> > Now, I remember seeing an abstract regarding those
> > plumes put out by I think Dr. Shoemaker. In this
> > abstract it was posited that the plasma cloud
> > achieved temps at nearly a million or more, such
> > that water molecules and all organic molecules
> > disrupted so that hydrogen separated from its
> > bonds. Now, it was stated in this abstract that
> > hydrogen escaped out into space but the free
> > remained and fell back with the remnants of the
> > plasma plume. In other words, the hydrogen was
> > "fractionated" from the oxygen and ejected away
> > the plume.
> > Now consider this. Tektites are virtually free of
> > water. The remaining cometary plasma was mostly
> > vaporized silicates and oxygen, and both were in a
> > environment with a paucity of hydrogen which had
> > escaped out into space. The rock vapor latched
> > free oxygen. The result would be a glass with
> > little if any water. And that would explain the
> > huge dust clouds (<nano>micro-tektites)remaining.
> > But I wonder if any large tektites condensed from
> > those plasma plumes and fell into Jupiter's
> > No craters were produced, yet huge dust clouds
> > floated in Jupiter's atmosphere for months.
> > I ran this by Dr. Shoemaker sometime before his
> > untimely death, and shortly later he was taken
> > us, thus I never got a response.
> > Could such happen here on earth?
> > Just imagine a huge cometary impact into our
> > atmosphere. A complete disruption, with a plume
> > cometary plasma erupting out into space. Hydrogen
> > fractionated from the plasma cloud, the remaining
> > silicate material and oxygen re-combining to form
> > glass, and the glass then falling back to earth in
> > some cases several thousands of miles form the
> > impact point.
> > No crater produced because the impact may have
> > happened over the ocean, or simply because the
> > disrupted in the air and never reached the ground.
> > Steve Schoner
> > #4470
> > ______________________________________________
> > Meteorite-list mailing list
> > Meteorite-list_at_meteoritecentral.com
> Meteorite-list mailing list
Received on Tue 14 Feb 2006 12:31:24 AM PST