#TITLE_ALTERNATIVE#

• Main Author: PUTRA ARIFIN ( Nim : 22713003 ) ; Pembimbing I : Irwan Iskandar, S.T., M.T., Ph.D. ; Pembimbin, ANDRE
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/19882
• Institution: Institut Teknologi Bandung

Abundance of geothermal manifestation widely distributed in southern ridge Bandung volcanic basin such as hotsprings and springs. Isotope studies were carried out to clarify details of hydrothermal system in southern ridge Bandung volcanic basin. Deuterium and 18O employed to study the genesis and origin of the water samples, while Tritium used to determine the age of the geothermal fluids. For further analyses, stable isotopes composition used to identify hydrogeological process and mixing ratio of the waters in each area, Two End Member used as method to determine ratio in mixing process. Water samples taken from the southern ridge Bandung basin, western Indonesia. There are 21 water samples collected consist of 3 crater, 16 hotsprings, and 2 springs. As result, most of water samples fall between evaporation and water-rock interaction line and some of samples fall near meteoric water line. It indicates that hotsprings and springs samples are enriched in heavier isotopes and deviate from local meteoric water line. This enrichment is commonly due to near surface evaporation, mixing between meteoric waters and isotopically enriched deep magmatic waters. Two End Member method suggest that the portion of meteoric water is higher than magmatic water. It indicates that hydrogeology of geothermal system in study area belong to low-medium temperature geothermal systems of convective type. <br />