THE EFFECTS OF NATURAL HEAT ON CLAY FORMATIONS AND THE INDIVIDUALIZATION OF THE WAY OF MIGRATION AND EFFECTS OF THE GEOTHERMAL FLUIDS
The behaviour of clay cover towards the geothermal fluids rising up to the surface may represent an excellent natural analogue of the potential migration processes from deep waste repositories in clay formations. The ENEA is conducting research in an appropriate area near M. Amiata in southern Tuscany in order to contribute to solving the problem of the expected impermeability of clay formations. Geothermal fields may namely give an opportunity of studying a case of clay behaviour at a scale corresponding to size and time considered in waste disposal. In the considered area a relevant geothermal field is still active. A clay complex represents the impermeable cover of the local geothermal field. Several endogenous phenomena indicate the preferential ways of migrations of fluids from the basement throughout the cover. The data obtained by the present research prove that the upward flow of fluids is possible only in the points of reduced thickness of the cover where very important faulting or granulometric discontinuity occur. This situation typically occurs at the border and not in the central part of the clay basins.
Bibliographic Reference: EUR 10585 IT (1986) MF, 20 P., BFR 150, BLOW-UP COPY BFR 200, EUROFFICE, LUXEMBOURG, POB 1003
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Record Number: 1989125051400 / Last updated on: 1987-11-01
Available languages: it