Tangyin Rift Tectonic Evolution and Paleozoic Thermal Storage Genetic Mechanism

摘要

Late Proterozoic, Luliang movement made vast areas of North China into the sector development period. Early Cambrian, North China block sank as a whole, depositing a 500 to 1400 meters stable carbonate sedimentary rocks. Jurassic - Cretaceous, Tangxi fracture and Tangdong fracture started to move, Tangyin depression took its shape. Late Cretaceous, under the strong influence of Yanshan movement, Tangyin depression uplifted along both sides of the swell. Late Eocene, under the strong influence of Xishan movement, Tangxi fracture and Tangdong fracture moved more strongly. Tangyin depression formed Cenozoic sedimentary places by lifting into settlement. Due to far extending and bigger dropping, two deep fractures controlled Tangyin depression's occurrence and development. Fractures' strong activity, sedimentary deposit and the evolution of Tangyin depression provided a good thermal storage reservoir, cover, pass, source conditions for formation of Paleozoic geothermal reservoir. Close to the swell, tectonic activity was strong, karst fissures was developed and geothermal reservoir's temperature was high.