GEOTHERM MODELING IN THE TRANSITION ZONE BETWEEN FLORES AND TIMOR ISLANDS, EAST NUSA TENGGARA, INDONESIA

• Main Author: Meutia Hidayati, Dian
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/75906
• Institution: Institut Teknologi Bandung

Indonesia has various tectonic conditions with active subduction, volcanic island and collision. The subduction movement of the oceanic crust of the Indo-Australian Plate under Java and Sumatra, has changed into a collision of the Australian Continental crust with the western Banda Arc along the islands of Flores, Sumba and Timor. This tectonic condition caused a series of volcanoes that are scattered around the island. The volcano that forms raises geothermal potential. This geothermal potential is influenced by the heat flow that occurs in subduction zones. The distribution of this heat flow can be used to estimate the subsurface temperature of the earth with several other supporting factors such as the value of thermal conductivity and radioactive heat. In this research, the solution of the geotherm equation assuming it is in a 1D steady state condition can be used to produce a geotherm gradient. The resulting geotherm gradient is a layer model of the seismic tomographic that passes through Flores Island and Timor Island which is assumed to consist of five lithostratigraphic layers. Calculations using Excel Software. The results of this calculation show that geological conditions have an effect on temperature variations on the line. In the partial melting zone, which is on Flores Island, the three parameters measured show higher values than the surrounding areas, with radioactive heat values ranging from 0.02 to 3.7 µW/m3, thermal conductivity values in each layer ranging from 2, 8-3.2 W/mºC and heat flow values around 42 m/Wm2.