Dear All
I read that paper before and I have a copy in my file. I think it is
totally irrelevant to this discussion. Those who are interested in
tectonic overpressure may wish to read Mancktelow (1993 JMG).
To explain tectonic overpressure very briefly, consider extruding
viscous material bwtween two rigid plates as in Jaeger (1964,
p.141). If the experiment is performed in zero confining pressure,
because of flow (strain rate) and viscosity, there will be pressure
(mean stress) in the material. Now imaging a similar process
taking place in the earth's crust, the total pressure at a point within
the material would be the sum of the overburden pressure
(density*g*depth) and the pressure due to strain rate and viscosity.
The latter is overpressure. In extruding situations, theory predicts
that the overpressure can be significant. Does this occur in
nature? That is a very important question to be answered.
Sincerely,
Dazhi Jiang
On 4 Nov 99, at 16:36, Eric Essene wrote:
> All,
> Mervyn Patterson wrote a paper on non-hydrostatic thermodynamics in
> 1973 or so in Reviews of Geophysics, I think.
> Eric
>
>
>
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|