STUDI GEOLOGI DAN GEOKIMIA KARAKTERISTIK SISTEM PANASBUMI NONVOLKANIK DI PULAU KALIMANTAN
The Borneo Island has several prospect geothermal areas which located in the outer region of the Quartenary volcanic belt. The objective of this research is to understand the characteristics of the geothermal system in Borneo and make the model conceptual. Secondary data from 10 researched areas con...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/43974 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The Borneo Island has several prospect geothermal areas which located in the outer region of the Quartenary volcanic belt. The objective of this research is to understand the characteristics of the geothermal system in Borneo and make the model conceptual. Secondary data from 10 researched areas consists of manifestation fluid chemistry, soil gas, geological map, gravity map, and audiomagnetotellurics map. This research is conducted using desktop study from PSDMBP field report from 2010 – 2015, paper, and journal.
This study shows that geothermal system in Borneo can be categorized in two systems, those are (1) an intrusion-hosted system which asociated with Quartenary magmatism that located in Tarakan Basin, North Borneo and (2) a heat flow system located in Kutai Basin, East Borneo; Melawi Basin, West Borneo; and Meratus Mountain, South Borneo. Characteristics of intrusion system are: a) a reservoir at a depth of 500 – 1100 m, b) partial equilibrium fluids, c) at certain areas travertine deposit, sulphur deposit, the smell of H2S gas, and CO2 gas exist around the manifestation, also 4) B, NH4, F, and Li substance in thermal water is quite high. Meanwhile, the characteristics of heat flow system are: a) a reservoir at a depth of 200 – 500 m and b) immature fluid. All the source of fluids in Kalimantan geothermal system originated from the meteoric water, while the reservoir temperature in a range from 100 – 200ºC. The total of hypothetical resources in 10 research areas are calculated to be 25 MW by heatloss method, 93 MW by comparison method, and 40 MW by volumetric method.
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