Journal of Geology & Geophysics

Journal of Geology & Geophysics
Open Access

ISSN: 2381-8719

+44 1478 350008

Study of hydrothermal alteration and hot water geochemistry in Mount Kendalisodo geothermal prospect area, Semarang, Central Java, Indonesia


International Conference on Geology

June 22-23, 2015 Florida, USA

Trio Fani, Putri Agustin and Heri Nurohman

Posters-Accepted Abstracts: J Geol Geosci

Abstract :

Mount Kendalisodo has a prospect of geothermal. This prospect is assumed by surface geothermal manifestation around this area such as hot springs and altered rocks. Hot spring is analyzed by geochemistry analysis to get some information of chemical fluids characteristic, fluids type, processes that occur with these fluids along itā??s migration from reservoir to surface, and to predict temperature of reservoir. Rocks that are located around Mount Kendalisodo has been analyzed by petrography method to determine minerals exchange. The next tests are carried out to determine the physical properties of rock such as porosity test, permeability test, and density test. There are five hot springs with temperature ranging from 36Ā°C to 40Ā°C and pH value from 5.9-7.8. The hot springs there have a dominant HCO3 composition and it indicates that these fluids are carbonate water with long distance and many process occur during these fluids migration. The hydrothermal alteration influence and siteā??s minerals composition with three alteration intensity (secondary minerals composition <25%), medium alteration intensity (secondary minerals composition between 25% and 75%) and high alteration intensity (secondary minerals composition >75%) that changes primary mineral composition to clay mineral in argilic alteration zone. This alteration based of geothermometer analysis, reservoir temperature is 175,190C. So, this system belongs to intermediate entalphy resource.

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