The thermal state of a region is crucial for understanding the main source of geothermal heat flow in the region,which help to solve the basic problem of regional heat source,and provide a basis for the study of the regional geothermal resources.Based on the regional geothermal measurements and deep borehole temperature logging carried out in China in recent years,this paper analyzes the crust-to-mantle heat flow ratio in China's land area and divides the land area into four geothermal zonal types,namely high-temperature geothermal zone with a crustal heat source,medium-and low-temperature geothermal zone with a mantle heat source,low-temperature geothermal equilibrium zone with a crust-mantle heat source,and medium-and high-temperature geothermal equilibrium zone with a crust-mantle heat source.On this basis,typical geothermal zones—such as the northeastern Tibetan Plateau,the Tengchong area,the southeastern coastal area,and the North China Basin—are selected to systematically analyze the basin-scale regional thermal state and its main controlling factors,such as the characteristics of the regional geothermal field,the distribution of heat flow,and the crustal-mantle thermal structure.The paper summarizes the deep and shallow geologic factors affecting the regional thermal state—including crust-mantle architecture,tectono-thermal events,stratigraphic lithology,fracture structure,etc.—and establishes multilevel controlling factors of regional thermal states,providing a scientific basis for the geothermal resource exploration and heat source condition analysis in different regions.
关键词
大地热流/壳幔热流比/地温场特征/控热因素
Key words
heat flow/crust-mantle heat flow ratio/geothermal field characteristics/thermal control factors
维普
万方数据