| Title | Geothermal System and Conceptual Model of Songa - Wayaua, North Maluku, Indonesia |
|---|---|
| Authors | Yuanno REZKY, Ahmad ZARKASYI, Robertus S.L. SIMARMATA |
| Year | 2015 |
| Conference | World Geothermal Congress |
| Keywords | Songa - Wayaua, Geothermal, Conceptual Model |
| Abstract | Songa-Wayaua geothermal area is one of the most interesting geothermal areas that located in the Bacan Island, province 0f North Maluku. Surface thermal features in the Songa-Wayaua area consist of hot springs, fumarole, mud pool, hot grounds, and rock alterations by temperature 65-103.5 0C. 3G surveys conducted in 2006 to identify the geothermal system and prospect area of Songa-Wayaua. 3 D-inversion model from gravity indicated geothermal system concentrated under Songa graben structure, between Bukit Lansa dan Bukit Pele. The two bodies is the youngest volcanic rocks and estimated as the heat source of geothermal systems in this area. Geological data of Songa-Wayaua indicate impermeable rocks that have properties with argillic clay mineral (argilic clay cap) on alteration zone near the hotsprings. Altered rocks occur in the Quaternary volcanic lava units and Sibela metamorphic rocks. This alteration is also reflected in the zone of magnetic anomalies, which are characterized by zones of demagnetization around manifestation of Babale Lansa, Pelepele and Padopado. Low apparent resistivity ( |