GLOBAL SCALE PROCESSES: Thermal structure
The oceanic lithosphere and oceanic hydrothermal systems
LITHOTHERMAL SYSTEMS: Magma traps
Sub-continental lithostatics
Lithothermal-hydrothermal interaction
HYDROTHERMAL SYSTEMS: Components
Flow in an extensive medium
Vapour systems: Larderello and Karapiti
DISCHARGE FROM HYDROTHERMAL SYSTEMS: General features of hot springs
Hydrology of the surface zone
Particular discharge mechanisms
Epilogue: Exploitation of hydrothermal systems.