The Deep Structures Of Western Turkey,and Its Conenction With Regional Geothermal Anomaly

Research area is located in the Western Turkey,southern margin of the Eurasian Plate.As a result of the subduction of African Plate and Arabian Plate,since Late Oligocene-Early Miocene,research area is now in back-arc extension tectonic stress field;while the subduction of the eastern Arabian plate is faster,the crust of the study area is moving westward simultaneously during the stretching process,the continuous stretching of the crust in the study area and the long-term vigorous movement of the active faults makes it become the world's most crustal deformation,the most active active fault,the most frequent earthquakes,geothermal resources,one of the most abundant areas.Geothermal energy is one of the most stable and cleanest energy sources in new energy sources,In recent years has become a hot research at home and abroad.Geothermal power generation has the advantages of reliable income and huge investment,therefore,the full study of the mechanism of regional thermal field,in the geothermal power investment decision-making,installed capacity design and risk control is indispensable.In this paper,the crust-upper mantle velocity structure with depth of more than 40 km depth is studied by using the fast wavefront advance ray tracing method and the subspace iterative algorithm;the focal mechanism of western Turkey-Aegean area is solved by gCAP method,and we found that the magma charmar exist in the depth of 15-50 km.On this basis,the focal mechanism of the key geothermal field is solved and the current tectonic stress field of the study area is retrieved by SATSI program,and found the normal fault is the major type of seismic fault,the Denizli basin is under the complex stress of the N-S extension and extrusion from eastern Turkey;taking the typical area of Denizili Basin as an example,the geothermal genesis model was established by using the magnetotelluric method,hydrogeochemical method and isotope geochemical method,and the reservoir properties,heat sources,water supply sources of geothermal field were described;the geothermal data,the geothermal gradient map,the spring temperature distribution map and the thermal storage temperature distribution map of the study area are plotted.The characteristics and regularity of geothermal anomaly distribution in the study area are systematically described;on the basis of the above,the geothermal genesis of regional geothermal anomaly distribution,such as stratigraphic distribution and heat storage distribution,volcanic activity and thermal field heat source,and the active thermal control mechanism of thermal fault are systematically expounded.The deep tectonic genesis of the distribution,such as the crustal and mantle velocity structure,the electrical structure,the depth of the inner surface and the deep structure represented by the gravity anomaly are systematically expounded,and the dynamic mechanism of the geothermal anomaly is systematically described;on this basis,the comprehensive mechanism of geothermal anomaly is established,and the highest heat flow is found at Kula,it is probably the main tunal of magma according to the deep structures.The innovation of this paper lies in the fact that the P-wave,S-wave velocity structure and Poisson's ratio are over 40 km above the depth of the study area for the first time based on the seismic tomography of massive earthquakes.For the first time,The spatial distribution of the form.Based on the mechanism of the focal mechanism,the tectonic stress field of the study area is established for the first time.For the first time,the genesis mechanism and thermal field properties of Denizli field were studied.The latest geothermal data of the area are collected by the system,and the geothermal anomaly distribution characteristics and regularity of the area are clarified according to the thermal field of the Denizli basin.The mechanism of geothermal anomaly distribution is systematically discussed from the aspects of geological origin,deep tectonics and tectonic stress field.The geothermal anomaly model of the whole western Turkey is established for the first time.