Poisson's ratio analysis (Vp/Vs) on volcanoes and geothermal potential areas in Central Java using tomography travel time method of grid search relocation hypocenter

8th International Conference on Physics and its Applications

Raharjo, W.^1 ; Palupi, I.R.^1 ; Nurdian, S.W.^1 ; Giamboro, W.S.^1 ; Soesilo, J.^2

Geophysical Engineering, Universitas Pembangunan Nasional Veteran Yogyakarta, Indonesia^1

Geological Engineering, Universitas Pembangunan Nasional Veteran Yogyakarta, Indonesia^2

关键词: Central Java Province;    Elasticity properties;    Eurasian plates;    Gas saturated rock;    Geothermal potential;    P- and S-wave velocities;    P- and S-waves;    Partial melting;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/776/1/012114/pdf
DOI  :  10.1088/1742-6596/776/1/012114

来源: IOP

【 摘 要 】

Poisson's Ratio illustrates the elasticity properties of a rock. The value is affected by the ratio between the value of P and S wave velocity, where the high value ratio associated with partial melting while the low associated with gas saturated rock. Java which has many volcanoes as a result of the collision between the Australian and Eurasian plates also effects of earthquakes that result the P and S wave. By tomography techniques the distribution of the value of Poisson's ratio can be known. Western Java was dominated by high Poisson's Ratio until Mount Slamet and Dieng in Central Java, while the eastern part of Java is dominated by low Poisson's Ratio. The difference of Poisson's Ratio is located in Central Java that is also supported by the difference characteristic of hot water manifestation in geothermal potential area in the west and east of Central Java Province. Poisson's ratio value is also lower with increasing depth proving that the cold oceanic plate entrance under the continental plate.