Re: New pictures of enceladus

On Apr 9, 12:40 am, auxotectonics_deletethis@xxxxxxxxxxxxxxxxxx
(Florian) wrote:
George <Geo...@xxxxxxxxxx> wrote:
It is liquid water volcanism.

Umm, the temperature at the south pole of Enceladus is -220 C. The hotspots
are only 100 degrees warmer, making them -120 C. Which means that it is ice
volcanism.

George, you're boring. If there is crystalline ice, there is liquid
water. period.





Otherwise there would be no crystalline
ice. There is very likely steam that would explain the geysers of ice. A
large amount of water is constantly ejected from the moon and feeds ring
E. It is evident that this phenomenon is going on for a long time. In
addition, most of Enceladus surface is young (low cratering) with the
young floor surrounding the ridges, especially the southern pole at the
"tiger stripes". It means that the young floor was spread by the tiger
stripes. This is reminiscent to Earth's ocean floor. Of course, all that
water ejected in space or spread at the surface must come from somewhere
as the moon show no sign of depletion.

Secondly, the surface of Enceladus is full of open fractures. It implies
a tensional stress all over the surface without evidence for
compressional stress at all. It is a strong argument for an expansion of
the surface. Besides, we have similar clues from other moons like
Ganymede, Miranda, or Ariel... and from the Earth.

The tensional stress can more easily be explained by tidal forces

Tidal forces imply both tension and compression. The compression
component is missing here. If you look at other moons, explaining the
surface of miranda as the effect of tidal forces is equal to believe in
Santa:

<http://www.astrosociety.org/education/publications/tnl/07/images/mirand
a_1.gif>

You're denying the evidence. Probably because you belong to the past
century. It's time to move on georgie!

which, by
the way, would also explain the hotspots, expecially considering the fact
that you can't explain why Enceladus would be expanding.

http://www.universetoday.com/2007/12/18/enceladus-cold-moon-with-a-ho...

"The leading model for the cause of the plumes on Enceladus is that the moon's
tides cause its crust to ratchet, or rub back and forth, in a set of faults
near the south pole. The forces between Enceladus, the big planet Saturn and
another moon, Dione cause what's called dynamical resonance, and Enceladus
is continually squeezed under this gravity field. This process creates a
small hot spot, in relative terms, for an icy satellite."

The tidal hypothesis does not hold. Mimas is as big as Enceladus, it is
much closer to saturn and the excentricity of its orbit is much more
important. It should be subjected to a tidal effect that is 25 times
more important than enceladus. But despite it is also an icy moon, there
is NO visible geological activity. Its surface is heavily craterized.

Hmmm. So Enceladus is expanding but Mimas, roughly the same size
isn't?

So what magic ingredient do you suppose keeps Mimas from expanding?

Stuart
.

Relevant Pages

  • Re: New pictures of enceladus
    ... From the rifts... ... about why the ice extrudes AT the rifts. ... the temperature at the south pole of Enceladus is -220 C. ... as the moon show no sign of depletion. ...
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  • Re: New pictures of enceladus
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