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Magnetotellurics is a passive exploration technique that utilizes a broad spectrum of naturally <br /> <br /> occurring geomagnetic variations as a power source for electromagnetic induction in the earth. <br /> <br /> MT method generally is used in geothermal exploration bec...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/22352 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Magnetotellurics is a passive exploration technique that utilizes a broad spectrum of naturally <br />
<br />
occurring geomagnetic variations as a power source for electromagnetic induction in the earth. <br />
<br />
MT method generally is used in geothermal exploration because there is a close relationship <br />
<br />
between resistivity and temperature. <br />
<br />
Observed anomaly is low resistivity (<20 ohmmeter) which interpreted as a response from <br />
<br />
geothermal sources environment. Maps of invariant resistivity was used for interpretation of MT <br />
<br />
data in area which have a complex geological condition such as volcanoes. Invariant component <br />
<br />
was used to simplify the problem of multidimensional dependencies between vertical and <br />
<br />
horizontal magnetic field component. <br />
<br />
From differentiation of Arrhenius equation, we obtain equation relating resistivity gradient and <br />
<br />
temperature gradient. True gradient of resistivity is approximated by apparent gradient of <br />
<br />
resistivity result from data processing. Resistivity gradient map shows us a better anomaly border <br />
<br />
than resistivity map. Result from mapping was cross-checked with simple 1-D resistivity <br />
<br />
structure model. |
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