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The research area is administratively located at Ranowulu District, Bitung, <br /> <br /> <br /> <br /> <br /> <br /> North Sulawesi and geographically located in UTM 170000-174000 mN and <br /> <br /> <br /> <br /> <br /...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/17858 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The research area is administratively located at Ranowulu District, Bitung, <br />
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North Sulawesi and geographically located in UTM 170000-174000 mN and <br />
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735000-740000 mE (51N Zone). The aims of this research are to understand the <br />
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geological setting of Pinasungkulan and surroundings area based on field data using <br />
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scale of 1:12.500 in 4 x 5 km2 area and also to analyze the geochemistry aspects of <br />
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geothermal manifestations in order to create a model of geothermal system in the <br />
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research area. <br />
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The research area is located in the northwest of Mt. Duasudara and Mt. <br />
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Tangkoko. Based on the landscapes, the research area can be divided into Volcanic <br />
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Cone Unit, Volcanic Footslopes Unit, and Volcanic Denudational Hills Unit. <br />
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Geology of the research area is also affected by the volcanic products of Mt. <br />
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Duasudara and Mt. Tangkoko. Geological history of the research area started on the <br />
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Pleistocen, marked by the activity of Mt. Duasudara that deposited Tuff Unit, <br />
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Andesitic Lava Unit, and Lapilli Tuff Unit sequentially. Then, the volcanic activity <br />
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was shifting northeast triggering the activation of Mt. Tangkoko that produced <br />
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Pyroxene Andesitic Lava Unit in the Pleistocene. the northwest of After all of the <br />
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lithological units were deposited, the geological structures that were controlled by <br />
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the activity of East Sangihe Subduction, i. e. Pinasungkulan Normal Fault, Toka <br />
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Tembaankoka Normal Fault, and Pareng Normal Fault were formed. The faults are <br />
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formed within one period of time. <br />
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Geochemical survey was done in order to know the geothermal system model <br />
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of Pinasungkulan and surrounding area by using water geochemistry analysis. <br />
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Geothermal manifestations in the form of bicarbonate (HCO3) warm springs are <br />
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found in 5 different locations, i.e. Pinasungkulan, Serawet, Batuputih, and Pareng <br />
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area, with temperature ranging from 34-41oC and pH 6,91-7,62. The manifestations <br />
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are originated from one reservoir with temperature rising about 200-230oC at 1.256- <br />
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1.497 m depth. The heat source of the geothermal system is controlled by the activity <br />
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of Mt. Tangkoko. The geothermal system in the research area has intermediate <br />
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temperature geothermal system with 20 MWe speculated resource. |
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