| Title | The Relationship Between Volcanic Centres and Active Hydrothermal Systems of the Bicol Peninsula, Luzon, Philippines |
|---|---|
| Authors | Bogie, I. and Lawless, J. V. |
| Year | 1986 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | |
| Abstract | The Bicol Peninsula is the setting for a chain of andesitic volcanic centres related to the subduction of the Philippine Plate along the Philippines trench. Two of these volcanic centres are currently active and there is evidence that at least five of them host large hydrothermal systems. The area was first evaluated by Dr G.W. Grindley for geothermal development in. 1963-64 and constitutes a major geothermal province with 330 MW(e) already installed and a further 110 MW(e) under development. Volcanic centres which are known to host hydrothermal systems are geomorphically complex with domes and collapse features, and produce differentiated rock types reflecting the presence of shallow subvolcanic magma chambers. In contrast simple andesitic stratovolcanoes tend to produce perfect cones, little variation in rock chemistry and do not appear to host hydrothermal systems. |