The possible role of fluids for the structuring of the continental crust

Details The possible role of fluids for the structuring of the continental crust The possible role of fluids for the structuring of the continental crust

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esrv...32...19m&link_type=abstract

Earth Science Reviews, Volume 32, Issue 1-2, p. 19-32.

Mathematics

Logic

2

Scientific paper

Some well known seismic reflectivity patterns of continental crusts characterize specific tectonic terranes. The role of fluids in enhancing or destroying such structures is studied. Seismicity is strongly dependent on the different pore pressure of fluids. In intraplate settings, in strike slip or extensional areas hydrostatic pore pressure seems to be approached, in accordance with standard rheological models and standard seismicity-depth distributions. In suture zones or zones of developing loads, possibly also along zones of near-horizontal normal faults, extremely high pore pressure develops which approaches lithostatic values. They are accompanied by a number of weakening processes with enhanced shear and reduced viscosity (η). These values correlate with low seismic velocities Vp in accordance with an empirical Vp-η relationship.

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