3-D structure of the discharging zone of the Daginsky hydrothermal system (Sakhalin Island) according to the ground penetrating radar method and well logs

• Published in: IOP Conference Series: Earth and Environmental Science
• Main Authors: Yu Pavlova, B, Zharkov, R V, Delemen, I F
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2019
• Subjects: Sakhalin
• Online Access: http://dx.doi.org/10.1088/1755-1315/324/1/012026; https://iopscience.iop.org/article/10.1088/1755-1315/324/1/012026/pdf; https://iopscience.iop.org/article/10.1088/1755-1315/324/1/012026

Abstract The paper presents the results of a comprehensive analysis of GPR data and geophysical well survey data (gamma-ray logging and self-polarization potentials) to study the 3-D spatial structure of the Daginsky hydrothermal system discharging zone (Sakhalin Island) and its hydrogeological situation. According to the GPR method, the paleo-valleys were identified, the morphology of which indicates the presence of runoff hollows, the accumulation of sandy-aleurite-clay sediments covered with peat formations. It can be concluded that the caprock in this area consists of a pack of water layers and permeable zones. Based on the data of geophysical studies in wells, three zones can be distinguished, each of which is characterized by the corresponding values of gamma activity and changes in the potentials of its own polarization. All this helps in identifying permeable thermally conductive zones. The data obtained are of practical importance.