Geothermal systems in the Sunda volcanic island arc : Investigations on the islands of Java and Bali, Indonesia
Veröffentlichungsdatum
2015-04-24
Autoren
Betreuer
Gutachter
Zusammenfassung
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.
Schlagwörter
Java
;
Bali
;
geothermal
;
boron isotope
;
geochemistry
Institution
Fachbereich
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Englisch
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Name
00104448-1.pdf
Size
9.48 MB
Format
Adobe PDF
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