A Poissonís Ratio Distribution from Wadati Diagram as Indicator of Fracturing of Lahendong Geothermal Field, North Sulawesi, Indonesia
- Key words
- Poisson's ratio, fractured, silicified alteration
- Location
- Lahendong, Indonesia; Sulawesi
- Conference
- World Geothermal Congress
- Year
- 2005
- Session
- 7. Geophysics
- Language
- English
- Paper number
- 0760
Full text
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Abstract
Poisson's ratio from Wadati Diagram using micro earthquake monitoring is relatively simple and useful for direct indicator of fracture. A short term micro earthquake monitoring in the Lahendong geothermal field shows two distinct shallow and deep hypocenters distributions. This paper describes the Poisson's ratio's distribution from Wadati method in the Lahendong geothermal field. The higher Poisson's ratio associated with shallow hypocenters indicated by the fractured rocks, and the lower Poisson's ratio associated with deeper hypocenters and un-fractured rocks with silicified rocks.
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