| Title | Dikes as Hydrothermal Reservoirs in Sedimentary Basins |
|---|---|
| Authors | Hirofumi Muraoka |
| Year | 2006 |
| Conference | Asian Geothermal Symposium |
| Keywords | dike, sedimentary basin, hydrothermal reservoir, permeability, Kii Peninsula, Hongu hot spring |
| Abstract | Dikes often play a key role of permeable reservoirs in impermeable host rocks. Cooling joints penetrate the entire dike body, providing a permeable conduit for aquifer. The dike reservoir phenomenon is typically observed in the flyschtype sedimentary basins where sediments are commonly impermeable. If we have such a deep aquifer conduit as dikes from the surface to a depth from a several km to a few tens km in a high geothermal gradient region, hydrothermal convection will inevitably occur. The genesis of the Hongu hot spring is a typical example for the dike reservoir phenomenon. |