| Title | Geochemistry of a Nonvolcanic Geothermal Area in Pohon Batu, West Seram Regency, Moluccas |
|---|---|
| Authors | Anna YUSHANTARTI and Santia Ardi MUSTOFA |
| Year | 2016 |
| Conference | Stanford Geothermal Workshop |
| Keywords | Indonesia, Moluccas, Non-volcanic, geochemistry |
| Abstract | Indonesia has many geothermal areas which are associated with non volcanic environment. One of them is Pohon Batu, West Seram Regency, Moluccas. The geothermal manifestations are only Pohon Batu 1-7 hotsprings, the temperatures are about 40-60,9oC with neutral pH. Physiographically, it is included Banda Dalam arc non volcanic which is consisted of metamorphic rocks in the Permian-Triassic. Pohon Batu has chloride-bicarbonate type of water based on Cl-SO4-HCO3 diagram and plots in partial equilibrium zone based on Na-K-Mg diagram. The temperature of reservoir is about 175-oC from Na-K geothermometry. |