Abstract
Datong Basin is a Cenozoic fault basin located in the central part of the North China Block with strong tectonic activity. The unique geological environment of Datong Basin is believed to have good conditions for the formation of geothermal resources. Based on the research of the classification, genesis and geothermal geological characteristics of geothermal resources, the geological conditions, seismic activity, volcanic activity, geophysical exploration results, terrestrial heat flow and hot springs in Datong Basin are analyzed. The possibility of the occurrence of geothermal resources in Datong Basin is determined, and the genesis and occurrence mechanisms of geothermal resources in Datong Basin are judged. The results show that Datong Basin satisfies the geological geothermal conditions of the formation of geothermal resources and is of great research value. The formation of geothermal resources in the Datong Basin is affected by the uplift of the Qinghai–Tibet Plateau and the destruction of the North China Craton. The geothermal resources in Datong Basin are formed by the combination of modern volcanic activity and strong inner-plate tectonic activities. The geothermal system is a combination of convective hydrothermal systems and partial melt systems. At the same time, it is concluded that the key research areas for the occurrence of geothermal resources are mainly in the northeastern part of the basin. It is recommended to carry out detailed and comprehensive exploration of the northeastern part of Datong Basin.
Highlights
With the constant consumption of global energy, the energy problem becomes more and more prominent
Datong Basin is a Cenozoic fault basin located in the central part of the North China Craton, NCC), which is divided into the Eastern Block (EB), the Western Block (WB), and the Trans-North
Because the basement is cut by Mesozoic and Cenozoic faults into several blocks of different sizes and elevations, the magnetic field appears to be abnormally positive and negative, and several narrow negative anomalies in the area are reflections of fault block collapse
Summary
With the constant consumption of global energy, the energy problem becomes more and more prominent. In the Cenozoic tectonic activity area, the crustal melts, partially melts, semi-solid and solid rheology to varying degrees, and the (semi-solid) solid rheological material (with little change in density) undergo uneven motion under the action of gravity and bedding shear forces These substances are upwelling to form heat sources, and heat conduction transfers abnormal heat energy to the upper strata through heat-controlled structures, forming an ideal target area for geothermal resources [10,11]. The heat source generated by partial melting transfer heat energy to shallow strata through large faults to form geothermal resources They have similarities in heat sources between the modern volcano zone and the inner-plate active tectonic zone. It is concluded that the formation of geothermal resources is related to tectonic activity, magmatic intrusion, volcanic activity and radiative activity of granite [13,17,18,19,20,21]
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