VULKANOSTRATIGRAPHY AND HYDROGEOCHEMISTRY OF MT. KARANG GEOTHERMAL SYSTEM

• Main Author: Marbun, Erwil
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/53605
• Institution: Institut Teknologi Bandung

Mount Karang is one of the mountains with the youngest age and the largest volume on Kaldera Danau Banten area. Mount Karang has the appearance of manifestations in the crater area in the form of sulfate springs and fumaroles that can be an indication of the activity of geothermal systems below the surface. There are other manifestations in the Cisolong area (foot of Mount Karang) in the form of bicarbonate hot springs that are suspected to have a relation with the Geothermal System of Mount Karang. This study uses Vulcanostratigraphy Studies to illustrate the boundaries of geothermal systems based on remote sensing. The result of vulcanostratigraphy is Vulkanostratigraphy Map that will be validated by Hydrogeochemistry Studies. The next step is sampling some manifestations of hot springs and cold springs at the research area. The result of this stage is a Manifestation Distribution Map that will be integrated with the Vulcanostratigraphy Map to see the area of manifestation distribution in the research area. The next stage is Hydrogeochemistry Analysis which is conducted on several samples of manifestations of hot springs and cold springs that have been taken in the previous stage. The analysis conducted include fluid type analysis, fluid interaction analysis with surrounding rocks, element geoindicators, major ion analysis on cold springs, and geothermometer analysis. The purpose of geochemistry analysis is to be able to describe the conditions below the surface and be able to validate the boundaries of the system that described before by the Vulkanostratigraphy Map. The final result of this research is the integration of Vulcanostratigraphy Studies and Geochemistry Analysis that has been conducted in the form of a 2D Conceptual Model of Mount Karang Geothermal System. The conceptual model is expected to describe the components of geothermal systems such as heat source, reservoir, caprock, discharge and recharge. The conceptual model is also expected to be able to describe the relationship between manifestations in the crater area of Mount Karang and manifestations in the Cisolong area (foot of Mount Karang). Conceptual Model of Mountain Geothermal System is expected to be a reference or consideration material on exploration activities in the Kaldera Danau Banten area, and especially in the area of Mount Karang.