[Turtle]

7DSUSYstrings, on 23 March 2012 - 01:40 PM, said:

True at increased pressures boiling temperatures change, thus superheaqting, still, as soon as something disrupts that confined volume, boiling occurs very rapidly and steam does develop, running away with the expansion.

you seem to imply that steam is coming out of hydrothermal vents; this is not the case.

Hydrothermal Vent

Quote

...
Hydrothermal vents in the deep ocean typically form along the Mid-ocean ridges, such as the East Pacific Rise and the Mid-Atlantic Ridge. These are locations where two tectonic plates are diverging and new crust is being formed.

The water that issues from seafloor hydrothermal vents consists mostly of sea water drawn into the hydrothermal system close to the volcanic edifice through faults and porous sediments or volcanic strata, plus some magmatic water released by the upwelling magma. In terrestrial hydrothermal systems the majority of water circulated within the fumarole and geyser systems is meteoric water plus ground water that has percolated down into the thermal system from the surface, but it also commonly contains some portion of metamorphic water, magmatic water, and sedimentary formational brine that is released by the magma. The proportion of each varies from location to location.

In contrast to the approximately 2 °C ambient water temperature at these depths, water emerges from these vents at temperatures ranging from 60 °C up to as high as 464 °C.[2][3] Due to the high hydrostatic pressure at these depths, water may exist in either its liquid form or as a supercritical fluid at such temperatures. At a pressure of 218 atmospheres, the critical point of (pure) water is 375 °C. At a depth of 3,000 meters, the hydrostatic pressure of sea water is more than 300 atmospheres (as salt water is denser than fresh water). At this depth and pressure, seawater becomes supercritical at a temperature of 407 °C (see image). However the increase in salinity at this depth pushes the water closer to its critical point. Thus, water emerging from the hottest parts of some hydrothermal vents can be a supercritical fluid, possessing physical properties between those of a gas and those of a liquid.[2][3] Besides being superheated, the water is also extremely acidic, often having a pH value as low as 2.8 — approximately that of vinegar. ...

[7DSUSYstrings]

Turtle, on 23 March 2012 - 04:31 PM, said:

you seem to imply that steam is coming out of hydrothermal vents; this is not the case.

Hydrothermal Vent

Not that steam is issuing from the underwater vents, more as a process of volcanism in general, same as for water at critical pressures. It would be tough indeed for a clearance to develop inside a (super/critically)compressed fluid.

This post has been edited by 7DSUSYstrings: 24 March 2012 - 08:05 AM

[Turtle]

7DSUSYstrings, on 24 March 2012 - 07:44 AM, said:

Not that steam is issuing from the underwater vents, more as a process of volcanism in general, same as for water at critical pressures. It would be tough indeed for a clearance to develop inside a (super/critically)compressed fluid.

sounds like pseudo-scientific babble to me. i do agree there is much yet to learn about underwater volcanism, ergo this thread.

[7DSUSYstrings]

Turtle, on 24 March 2012 - 08:18 AM, said:

sounds like pseudo-scientific babble to me. i do agree there is much yet to learn about underwater volcanism, ergo this thread.

You mean if I say the boiling temperature of water raises proportionally to the containment pressure, that is pseudo-scientific babble or you agree with that part?

[Turtle]

7DSUSYstrings, on 24 March 2012 - 10:46 AM, said:

You mean if I say the boiling temperature of water raises proportionally to the containment pressure, that is pseudo-scientific babble or you agree with that part?

i agree with that, but i didn't see you say that. having visited your page, it is what you are not saying here that i find questionable. e.g. you say at your page:

Dr. Charbonneau said:

The above is the next layer of the mantle as what we know would predict. There are pockets of water and cooler rocks and sand mass that give way to tension areas of steam that lead through the mantle plumes into the hottest spots, where volcanoes may form and expansion develops. ...

poor grammar aside, that is pseudo-scientific babble.

This post has been edited by Turtle: 24 March 2012 - 04:56 PM

[7DSUSYstrings]

Turtle, on 24 March 2012 - 03:16 PM, said:

i agree with that, but i didn't see you say that. having visited your page, it is what you are not saying here that i find questionable. e.g. you say at your page:

poor grammar aside, that is pseudo-scientic babble.

I've found in general that the ones so quick to assess just about anything as pseudo-science end up revealing themselves to be the worst pseudo-scientifics in the bunch. As a general rule these people are anal retentives and usually cannot follow eccentric creativity, because their imaginations are 2 dimensional, if that. If what you want is someone to wave hands and agree with you, then I'll simply not respond to your posts. I simply don't have time for that GIGO routine.

[Turtle]

7DSUSYstrings, on 24 March 2012 - 04:53 PM, said:

I've found in general that the ones so quick to assess just about anything as pseudo-science end up revealing themselves to be the worst pseudo-scientifics in the bunch. As a general rule these people are anal retentives and usually cannot follow eccentric creativity, because their imaginations are 2 dimensional, if that. If what you want is someone to wave hands and agree with you, then I'll simply not respond to your posts. I simply don't have time for that GIGO routine.

thanks. i will appreciate no more posts from you.

moving to the topic at hand.

El Hierro Submarine Volcano Eruption

NASA said:

Four months after it began, the underwater volcanic eruption off El Hierro Island persists. This natural-color satellite image, collected on February 10, 2012, shows the site of the eruption, near the fishing village of La Restinga.

...
According to El Hierro Digital, measurements of the sea floor by the Instituto Oceanográfico Español found that the volcano’s summit is now only 120 meters (390 feet) beneath the ocean surface—10 meters (30 feet) higher than it was in mid-January. The height of the erupting cone is about 210 meters (690 feet) above the former ocean bottom, with a total volume over 145 million cubic meters (5.12 billion cubic feet) of new material. ...