鄂尔多斯盆地西缘冲断带平凉段地质—地球物理特征与地热勘查

GEOLOGICAL AND GEOPHYSICAL CHARACTERISTICS AND GEOTHERMAL EXPLORATION IN PINGLIANG SECTION OF EERDUOSI WESTERN MARGIN THRUST BELT

本文对近期平凉地热勘查中引用以往推断的近SN向和NEE向隐伏断裂的推断依据进行了核实,并研究该区石油地质和地球物理场特征对区域断裂构造的反映,结合石油地质构造探讨了重力场特征在该区识别断裂和褶皱的标志,认为平凉城区地热勘查推断的两条近SN向隐伏断裂向深部延伸依据不足,NEE向断裂解释有误,同时根据重力场特征反映的平凉颉泾河断陷和基底断裂的构造格局,论述平凉市区内颉泾河断陷不具备南北向深断裂及其导水导热的构造条件。

This article verifies the basis of inferring nearly ns-trending concealed fault in Pingliang past geothermal exploration data, and studies the petroleum geology and gravity field characteristics responding to the regional fracture structure in this area. Based on the petroleum geological structure it discusses the gravity field characteristics marks to identify fracture and fold. It thinks Pingliang region geothermal exploration inferred two nearly NS-trending concealed fault deep extension basis is insufficient, and nearly EW-trending fracture interpretation is wrong. at the same time, according to the tectonic framework of Jiejinghe fault depression and basement faults the characteristics of gravity field reflecting out, it discusses the Pingliang area Jiejinghe fault depres sion do not have NS-trending deep fracture conductivity water and thermal tectonic conditions.