Re: heat corpuscles in the mantle


Alan wrote:
> In article <1134265314.314077.315840@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
> don@xxxxxxxxxxxx (don findlay) wrote:
>
>
> Actually Don, as you ask, for a very long time I have had this site bookmarked.
>
> http://www.sentex.net/~tcc/siem.html
>
> Subcrustal Ice Earth Model
>
> What's Down Inside?
> Could the earth contain a subcrustal ice layer? Jupiter's largest satellites,
> Ganymede, (diameter 5,262 km, density 1.94 gm/cm3), and Callisto, (diameter
> 4,800 km, density 1.86 gm/cm3) have water/ice mantles and rocky cores.
> Ganymede's crust probably consists of a thick layer of water ice.
>
> The earth is unique in the solar system because of the presence of liquid water
> at the surface, and its high density core. The earth's atmosphere, also, is
> uniquely constituted for sustaining life. But evidence for ice and water
> elsewhere naturally leads to the question, why couldn't the earth's interior
> also contain an ice layer? The Subcrustal Ice Earth Model (SIEM) is being
> developed to investigate this possibility.

Not as Doug Cox envisions it.

As was pointed out a number of years ago on talk.origins., Cox's model
can't account for the observed seismic phase veolocities in the Earth.
THats just the tip of the ice-berg ( No pun intended).

Futhermore, there is a large difference between what Cox proposes (he
is a young earth creationist) and what experimental petrologists
propose. Cox is driven to find an explanation for something which never
happened, the Noachian Deluge/

>
> According to the conventional theory of plate tectonics, water and other
> materials from the earth's surface are recycled to the deep interior by
> hypothetical processes of subduction and convection. The driving force for the
> postuated movements of the plates is mantle convection, a process invoked by
> Arthur Holmes as a mechanism for continental drift.
>
> The Inner Workings of the Earth by Michael Wysession, from American Scientist,
> March-April 1995 presents a discussion of current thinking about mechanisms for
> recycling water and other materials from the earth's surface to the deep
> interior. According to the theory, some of this water returned to the interior
> by convection driven processes becomes ejected in volcanic eruptions.

>
> The convection hypothesis comes under critical scrutiny in: Is mantle convection
> no more than a storm in Arthur Holmes' porridge bowl? This author of this
> article [presumably Dr. Ken Duckworth, professor of geophysics at the University
> of Calgary], uses the pseudonym A.H.E.Retic. He tilts against "a concept so
> powerful that even today it has become a Mantra to be chanted by all should they
> ever hope to get a grant to study any aspect of the crustal behaviour of the
> earth". The article identifies several fatal flaws in the standard dogma of
> mantle convection, and develops some helpful Retic's Rules.
>
> Could the concept of recyling of water from the earth's hydrosphere back into
> the depths of earth, (needed for the conventional view of an ancient earth,
> billions of years old) be wrong? Thermodynamics suggests bodies that are heating
> up degass. The high concentration of radioactive isotopes in rocks could mean
> the earth is heating up. See The Heat of the Earth.

THis seems to ignore the fact that the Earth's compliment of
radioactive materials is diminishing through time.

>
> A 1995 paper by Lars Stixrude, Mineral physics of the mantle from Reviews of
> Geophysics considers possible mechanisms by which water and volatiles could
> exist deep in the earth's interior, combined with other minerals. Stixrude notes
> that 1% by weight water stored in the earth's mantle amounts to 30 hydrospheres.

Lars has done some extraordianry work in that area.

However, some of the claims above are bizarre. THe fact that the mantle
may contain a component of water, makes convection more likely as a
mechanism, not less.
>
> If the water and volatiles in the earth's interior are primeval, the earth could
> not be billions of years old!

?

A laughable assertion.

Stuart

.

Relevant Pages

  • Re: heat corpuscles in the mantle
    ... >> me, ..and he's very keen on convection in the mantle and subduction, as ... >> way, ..and if that is so, then the Earth is getting bigger, and the ... >> corpuscles of heat tied up in minerals which are locked in the solid ... >> drive convection in water, why would it drive it in solid rock? ...
    (sci.geo.geology)
  • Re: heat corpuscles in the mantle
    ... >> me, ..and he's very keen on convection in the mantle and subduction, as ... >> way, ..and if that is so, then the Earth is getting bigger, and the ... >> corpuscles of heat tied up in minerals which are locked in the solid ... >> drive convection in water, why would it drive it in solid rock? ...
    (sci.geo.geology)
  • Re: heat corpuscles in the mantle
    ... > me, ..and he's very keen on convection in the mantle and subduction, as ... > way, ..and if that is so, then the Earth is getting bigger, and the ... > The question was:- In a mantle that is convecting because of the heat ... > drive convection in water, why would it drive it in solid rock? ...
    (sci.geo.geology)
  • Re: heat corpuscles in the mantle
    ... >> Subcrustal Ice Earth Model ... >> Ganymede's crust probably consists of a thick layer of water ice. ... >> hypothetical processes of subduction and convection. ... >> The convection hypothesis comes under critical scrutiny in: Is mantle ...
    (sci.geo.geology)
  • Re: Twenty questions for creationists
    ... What are the three greatest challenges to evolution, ... earth was 100% tropical even in the polar regions. ... see today because a water vapor canopy encircled the earth much like we see ... The entire point of teaching both evolution and creation side by side would ...
    (talk.origins)