Self-Potential Survey in the Geothermal Prospects around Bajawa, Flores, Indonesia

Abstract

Self-potential (SP) surveys were carried out in the Mataloko and Nage geothermal fields, Flores Island, Nusa Tenggara, Indonesia. The highest positive SP anomaly in Mataloko was observed in the area with geothermal manifestation. On the other hand in Nage, no single clear positive anomaly can be seen. In Nage, the SP profile along the Wae Bana river shows quite steep up-and-downs which are considered to be corresponding to the recharge and discharge zones along the river. The difference of SP distribution in Nage and Mataloko areas suggests that the extent of shallow upflow zone in Mataloko is quite small whereas that in Nage is considerably large.