Abstract
The geomechanical model has been developed. It describes the spatial distribution of stresses and strains and their temporal evolution for the southern part of the Central Sakhalin Fault. The boundaries of the model are the faces of a parallelepiped with sides of 150 km in the meridional direction, 60 km in the sublatitudinal direction and a depth of 30 km. Geographically, the model is confined to coordinates within 46.4°–47.4°N and 142.2°–142.8°E, the paper describes the main stages of creating a geomechanical model. The initial field data for the model are taken from the results of the deep seismic sounding, well logging, measurements with the GPS/GLONASS positioning, and seismological data. The model is divided into 8 layers in depth with different densities from 1.9 to 2.78 g/cm3, Young’s modulus from 1.2 to 44.9 GPa, and Poisson’s ratio from 0.27 to 0.28. To estimate the details of deformation of the selected block of Central Sakhalin fault zone, the surface has been divided into 9 blocks with different strain rates from 0.5 to 2.3 mm/year. Stress values change with increasing depth in the range of 50 to 1500 MPa for σ1, 30 to 1000 MPa for σ2, and from 20 to 600 MPa for σ3. The first results on the distribution of the stress-strain state in the fault area have been obtained.
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Kamenev, P., Bogomolov, L., Zabolotin, A. (2019). Development of Geomechanical Model of the South Segment of Central Sakhalin Fault Zone. In: Kocharyan, G., Lyakhov, A. (eds) Trigger Effects in Geosystems. Springer Proceedings in Earth and Environmental Sciences. Springer, Cham. https://doi.org/10.1007/978-3-030-31970-0_9
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