Characteristic of Geothermal Chemistry Fluids at Seram Island, Maluku, Indonesia
Anna YUSHANTARTI and Bangbang SULAEMAN
[Center For Mineral, Coal, and Geothermal Resource, Indonesia]
Preliminary Characteristic of geothermal chemistry fluids is one of the methods to understand the geothermal behavior. This could be evaluated by the several types of geothermal manifestation, result of thermal water analysis, type of the water geothermal manifestation, and estimated consideration the temperature reservoir with water geothermometry. Indonesia has 349 geothermal locations by December 2018; from these, 33 locations are at Maluku, Eastern Indonesia. Seram Island is Medium sized Island at Maluku Province, a non-volcanic area and at least already having 5 geothermal areas. They are Tehoru, Banda Baru, PohonBatu, KelapaDua, and Niff-Bula geothermal areas. Generally, it is included Outer Banda arc non volcanic which is consisted of metamorphic rocks in the Permian-Triassic. Mostly they only have hot springs, and generally the temperatures are about 37.3-99.6oC with neutral pH. They are chloride and chloride-bicarbonate type of water based on Cl-SO4-HCO3 diagram and mostly plotted in partial equilibrium zone based on relative Na-K-Mg diagram. The temperature of reservoir is medium about 136-220oC from Na-K geothermometry. Indonesia government is focusing the development of Eastern Indonesia. The Characteristic of geothermal chemistry fluids in Seram Island could be a consideration for those who will develop geothermal whether for direct use and for indirect use.
|        Topic: Geochemistry||Paper Number: 14143|