Resistivity Structure of the Silali Geothermal Prospect in Kenya
- Key words
- Geothermal; Kenyan north rift; resistivity structure; magnetotellurics; transient electromagnetic; steam dominated reservoir; heat source
- Location
- Silali, Kenya
- Conference
- Geothermal Resources Council Transactions
- Year
- 2011
- Session
- Exploration; Geophysical surveys
- Language
- English
Abstract
Geophysical surveys comprising of Magnetotelluric (MT) and Transient Electromagnetic (TEM) methods were carried out in Silali geothermal prospect in the Kenyan north rift in order to image the resistivity distribution within the earth to depths of many kilometers which is then interpreted in terms of lithology. Joint 1-D Inversion results of Transient Electromagneti>c (TEM) and Magnetotelluric (MT) data reveals a resistivity structure consisting of a shallow high-resistivity zone (> 100 ?m), in about the uppermost 600m, underlain by low resistivity zone (10 ?m) ) to depths of about 1 kilometre and a deeper high resistivity (>50 ?m) up to 3-4 km from the surface which is probably the steam dominated reservoir, again underlain by lower resistivity (about 4 km) which is interpreted as the heat source.
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