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GEOLOGI PANAS BUMI
Ali Okto, ST., MT
Fakultas Ilmu Dan Teknologi Kebumian
Universitas Halu Oleo
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FAKTOR PENILAIAN
NILAI =2 + 3 + 5
10
FAKTOR NILAI NILAI
86-100 A
76-85 B
86-75 C
56-65 D
NILAI =2 + 3 + 4 + 6
15
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OUTLINE:
PENGENALAN ENERGI PANAS BUMI DAN PENGGUNAANNYA DI
INDONESIA DAN DUNIA
TEKTONIK LEMPENG DAN KEGUNUNGAPIAN
TERJADINYA SISTEM PANAS BUMI DAN BERBAGAI MACAM
DEFINISI DAN TERMINOLOGI
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Pengertian:
Panas bumi adalah sumber energi panas yang terkandung didalam air panas, uap air, dan batuan bersama mineral ikutan
dan gas lainnya yang secara genetik semuanya tidak dapat
dipisahkan dalam suatu sistem panas bumi dan untuk
pemanfaatannya diperlukan proses penambangan (UU No.27/2003)
Sistem Panas Bumi:
1) Heat Sources2) Reservoir dan Clay Cap
3) Adanya Hydrology System
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1 Origins of geothermal energy
– 1. Left-over heat from the
time of the accretion ofthe earth (4.6 By BC)(30%)
– 2. heat generated by the
decay of the long-livedradioactive isotopes ofuranium (U238, U235),thorium (Th232) andpotassium (K40) (70%).
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1 Origins of geothermal energy
Temperature distribution in the earth
Temperatures in the earth Geothermal gradient in the upper 150km
dT/dz ~ 30 oC/km
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1 Origins of geothermal energy
Mechanisms of heat transport in the earth
(2) Heat transport by
convection
Mantle convection driving
the plates
Numerical simulation of
Mantle convection
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1 Origins of geothermal energy
The earth’s thermal regime and relation with plate tectonics
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1 Origins of geothermal energy
The earth’s thermal regime and relation with plate tectonics
Plates, plate boundaries and distribution of volcanoes across the earth
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1 Origins of geothermal energy
Plate tectonics and geothermal fields
World pattern of plates, oceanic ridges, oceanic trenches, subduction zones, and geothermal fields.http://www.geothermal-energy.org/105,interactive_map.html
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2. Classification of geothermal systems/reservoirs
The “ideal geothermal reservoir”
= high temperatures + water= steam!!!
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2. Classification of geothermal systems/reservoirs
Thermal processes in an “ideal geothermal reservoir” resulting in theformation of hot steam
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