Re: Owen's Two-Phase Model of Earth Expansion

From: don findlay (don_at_tower.net.au)
Date: 03/16/05 

Date: 16 Mar 2005 05:07:32 -0800

George wrote:
> "Stuart" <bigdakine@aol.com> wrote in message

> Much of these strata are now above sea level because
> of the tectonic processes involved in mountain building, i.e., the
collisions of
> continents (such as Africa Europe with North America during the
initial
> formation of Pangea, and in some instances because of subduction of
ancient
> oceanic crust), which buckled and raised these regions above sea
level forming
> the mountains at the continental margins, which were then eroding and
filling in
> these basins prior to the basins being uplifted.

You mean like here:-
http://users.indigo.net.au/don/ng/null.html
??

> And as a result of the
> emergence of the continental interiors from the sea, erosion has
taken place
> that has exposed deeper and deeper strata in these basins. The
strata is well
> documented and understood, as are the tectonic structures and how
they relate to
> Plate Tectonics. Try reading up on the Borden Formation. It is a
classic
> example of basin infilling as a result of plate movements, and
resulting
> mountain building episodes. No expansionists need apply.
>
> >> 6. Ergo water and mantle are being produced at the same time at
> >> (roughly) commensurate rates: i.e., what makes mantle makes water.
>
> Bullocks. Mantle rock is composed of anhydrous minerals (i.e.,
pyroxenes). If
> there is abundant water in the mantle, why is the mineralogy of
mantle rocks so
> lacking in hydrous minerals? And why is the primary porocity and
permeability
> of mantle rocks nearly non-existent? They are so lacking in primary
hydrous
> minerals, and are lacking in the primary porocity and permeability
required for
> water to be present exactly because of the pressures required (which
prevents
> development of primary porocity and permeability) in the mantle in
order for
> them to form. Unaltered lava formed at the MORs are completely
devoid of
> hydrous phases. If water in the oceans is derived from the mantle,
why are
> unaltered lavas at the MORs composed entirely of anhydrous phases?
The only
> place where you see hydrous phases is where hydrated, old, cold crust
is
> subducted into the mantle, where it gets squeazed and heated out of
the rock.
> The resulting volatiles then react with and partially melts the
hanging wall
> mantle above the subducted crust. This partial melt, full of
volatiles rises,
> forming diapirs that erupt at the surface as andesitic volcanoes.
These lavas DO
> contain hydrous phases (i.e., amphiboles).
>
> >> I.E. the continental crust 'sits in' two plimsol lines - one for
the
> >> mantle, and one for the water. That is, the water does not really
> > sit
> >> on the continental crust but sits on(/in) the mantle, and washes
over
> >> the continents from time to time as there is resistance to
outwards
> >> movement of the crust (anchored more in various spots than
others).
> >> Obviously there are two types of water, ..one from below (mantle -
=
> > a
> >> 'structural element' of sorts) and one from above (rain - = a
> >> 'stratigraphic layer'). So the 'stratigraphic' water sits on the
> >> crust, but that's all. The other stuff (salty) is of the mantle
> >
> > ?
> >
> > Stuart
>
> The ocean is salty because of the sediment the runs into the oceans
from the
> continents. The salts come from the continents. They do not come
from the
> mantle. Indeed, I've never see one single paper that suggests
otherwise. If
> salt originated in the mantle, you would see great salt deposits
buried along
> and/or adjacent to the MORs instead of within continental basins and
beneath
> river deltas. The only areas where you see rifting and salt deposits
are in
> continental rifts, such as the East African Rift valley, where you
also have dry
> lake beds. Since you don't see great salt deposits along the MORs,
your
> hypothesis is just more DF baloney.

You mean there are no submarine evaporites along mid-ocean ridges, and
that is why salt is not a 'generic/ intrinsic component of the water of
the oceans?

'George'???? Are you there?

Relevant Pages

  • Re: Owens Two-Phase Model of Earth Expansion
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