Geochemical Study of Hot Spring Water Discharge on the Northern Slope of Mt. Muayat in the Kotamobagu Geothermal Field, North Sulawesi, Indonesia
- Key words
- Geochemical, hot spring, conceptual model, Mt. Muayat, Kotamobagu
- Location
- Kotamobagu, Indonesia; Sulawesi
- Conference
- Asian Geothermal Symposium
- Year
- 2011
- Language
- English
- Paper number
- 61
Full text
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Abstract
Nine water samples were collected from thermal spring, river, and shallow well at northern side of Mt. Muayat,Kotamobagu geothermal field. Temperature of waters, Electronic Conductivity (EC) and pH were measured on site and chemical analysis in laboratory. The analyzed results were plotted on Cl-SO4-HCO3 ternary diagram, and characterized into three groups of Cl-SO4, and HCO3 and alkali chloride waters. From Na-K-Mg plot, all hot spring water was determined as immature waters. The geochemical temperature calculated with quartz geotermometer showed in the range about 127-135°C, with Na-K geothermometer in a range 210-250⁰C. A conceptual model of hydrothermal system of the northern area of Kotamobagu was developed.
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