Geology Reference
In-Depth Information
Present-Day Geo-Fluid-
Dynamics of Alpine Mobile
Belt Basins
5.1
Abnormally-High Fluid Pore Pressure as a Factor
in the Formation of Faults, Structure Plans,
Regional and Local Folded Structures
The formation of tectonic features in large components of depositional
basins, the emergence and evolution of faults, regional and local struc-
tures in them, genetic associations and spatial interrelations between these
faults, regional and local structures within evolutionary and tectonically
different regions are controlled by a number of tectonic factors and mecha-
nisms. These factors and mechanisms can become dominant under certain
circumstances.
A derivative of geo-fluid-dynamic processes, the syngenetic abnormally
high pore pressure (AHPP) forms in clay sequences with the density inver-
sion in the sedimentary section and with low shear strength. It is suggested
that at least in some Alpine mobile belt basins filled-up with thick alterna-
tions of competent and incompetent rocks this derivative is responsible
for a number of phenomena. These phenomena include the formation of
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