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STUDY OF MIGRATION PROCESSES IN CLAY FORMATIONS OCCURING IN NATURE.

Objective

THE PERMEABILITY STATE OF CLAY MAY BE AFFECTED BY TECTONIC EVENTS. FRACTURES AND FAULTS MAY INDEED GIVE RISE TO A SECONDARY PERMEABILITY WITHIN ARGILLACEOUS ROCKS. OCHRACEOUS BANDS ASIDE FROM THE FRACTURE PLANES EVIDENCE CIRCULATION OF METEORIC WATER WITHIN FRACTURES SYSTEMS IN CLAY. THE PENETRATION DEPTH OF THESE WATER IN CLAY SHOULD REVEAL THE THICKNESS OF CLAY AFFECTED BY SECONDARY PERMEABILITY DUE TO TECTONICS. THE PRESENT WORK IS A CONTRIBUTE AIMED AT ASCERTAINING THE REAL INFLUENCE OF TECTONICS ON CLAY IN PARTICULAR FORMATIONS IN THE SIENA BASIN IN CENTRAL WESTERN ITALY. THE TECTONICS OF THE BASIN, A TYPICAL GRABEN, IS WELL DEFINED.
COMPLEMENTARY RESEARCHES IN OTHER SITUATIONS, I.E., IN PASQUASIA MINE, WHERE CLAY ARE HIGHLY FRACTURED, OFFER THE OPPORTUNITY OF INVESTIGATING A CLAY SYSTEM ISOLATED FROM SURFICIAL WATER.

THREE MAIN LINES HAVE BEEN ENVISAGED:
1. SELECTION OF THE MOST APPROPRIATE SITUATIONS REFERRED TO THE GENERAL TECTONIC FRAME;
2. STUDIES ON THE VARIATIONS OF THE GEOCHEMICAL SYSTEM OF CLAY BECAUSE OF THE PENETRATION OF THE METEORIC WATER;
3. INVESTIGATION ON THE EXTENT AND CAUSES OF THE SECONDARY PERMEABILITY OF CLAY AND THEIR IMPORTANCE WITH REGARD TO THE GEOCHEMICAL STABILITY OF CLAY FORMATION.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Ente per le Nuove Tecnologie, l'Energia e l'Ambiente (ENEA)
Address
Via Anguillarese 301
00060 Santa Maria Di Galeria (Roma)
Italy

Participants (3)

UNIVERSITA DEGLI STUDI DI PAVIA
Italy
Address

271 Pavia
UNIVERSITA' DEGLI STUDI DI SIENA
Italy
Address

Siena
Università degli Studi di Roma
Italy
Address

Roma