Abstract:
The Tangkuban perahu geothermal field is located in West
Java, Indonesia, about 20 kilometres to the North of
Bandung.
Geophysical surveys of Tangkuban perahu, particularly using
resistivity traversing and VES with schlumberger and
Magnetotelluric arrays were made to evaluate the electrical
resistivity distribution within the geothermal field. Low
concealed resistivity anomalies are encountered in both the
Kancah and Ciater area. The interpretation of the
magnetotelluric soundings and VES curves by computer
modelling indicates that deep outflow zones have a
resistivity about 1 to 6 Ohm-me The outflows are overlain
by a high resistivity layer of about 15-65 Ohm-me The low
resistive zone, laterally, is confined by resistivity layer
of about 14-42 Ohm-me
Gravity anomalies over Tangkuban perahu are associated with
Caldera structure infilled with less dense Pyroclastics.
No detailed interpretation of the anomaly can be given
since a major reduction error in the data was detected at
the final stage of the project.
A positive self potential anomaly observed in this area can
be interpreted in terms of upflowing and outflowing
mineralized fluids from the deep Tangkuban perahu system.
Description:
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