Abstract:

The paper discusses mainly the distribution, geometric features and genesis of thrust structures in Xuyangqiao-Heilongcun buried hill belt in Huanghua depression and the significance in discovering them. Several thrust faults are interpreted with high quality geologic data and well-logging data collected in our research work in the study area. These thrust faults are found in the study to be characterized with deep dissection, big separation and major width of the section. It is believed that above mentioned thrust faults were formed in the early Yanshanian due to the chief motive force of left strike-slip of Tanlu rift. The discovery of the thrust structures in Xuyangqiao-Heilongcun buried hill belt in Huanghua depression is of great guiding significance in oil and gas exploring in Dagang oilfield.

Key words: Huanghua depression, thrust structure, Tanlu fault, discovery