Geothermal systems in the Sunda volcanic island arc : Investigations on the islands of Java and Bali, Indonesia
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Other Titles: | Geothermale Systeme in der Sunda Vulkaninsel arc : Untersuchungen auf den Inseln Java und Bali, Indonesien | Authors: | Purnomo, Budi Joko | Supervisor: | Pichler, Thomas | 1. Expert: | Pichler, Thomas | Experts: | LaFemina, Peter ![]() |
Abstract: | The different physicochemical characteristics between volcano-hosted and fault-hosted on the Java island were determined. Boron isotope was applied to further distinguish the two geothermal systems. The possibility of a carbonate sedimentary basement as the host-rock of geothermal systems on the Bali island was investigated. The volcano-hosted had higher HCO3- contents and Mg/Na ratios compared the fault-hosted due to the CO2 magmatic gas supply. The reservoir temperature and lithium (Li) enrichment indicated a Quaternary magma and deep seated magma heat sources for the fault-hosted systems. Volcano-hosted geothermal system had a heavier à ´11B values than fault-hosted due to the magmatic fluids input and faster ascent. The (Ca2 Mg2 )/HCO3- of approximately 0.4 ruled out a carbonate host rock type on Bali, instead a calc-alkaline magmatic rocks was concluded. The well correlation of HCO3- content with Ca2 , Mg2 , Sr2 and K revealed water-rock interaction influenced by carbonic acid. B isotope confirmed seawater input in Parangtritis, Krakal and Banyuwedang. |
Keywords: | Java; Bali; geothermal; boron isotope; geochemistry | Issue Date: | 24-Apr-2015 | Type: | Dissertation | Secondary publication: | no | URN: | urn:nbn:de:gbv:46-00104448-18 | Institution: | Universität Bremen | Faculty: | Fachbereich 05: Geowissenschaften (FB 05) |
Appears in Collections: | Dissertationen |
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