Because of the limitation of the degree of exploration and the complex tectonic deformation of surface and subsurface, the structural model for Kalpin fold thrust zoneis of multiple solutions, which directly affects the exploration potentials of this area. Combing with previous research results and geological outcrop, seismic and drilling data, a new model for this area is developed, from which the following understandings are obtained：Tectonic deformation is characterized by apparent zonation from south to north, segmentation from east to west. East and west have “seesaw type” sedimentary characteristics, Middle Cambrian has a great thickness of salt so it’s mainly developed the decollement structure of the central in Piqiang segment but basement involved thrust mainly developed in east and west segments. palaeo-uplift formed in Carboniferous Period and it’s layer onlap deposit on Silurian and Devonian system are characterized by fill up and gaps. There are two-period fractures developed in Piqiang segment, early fractures are developed in Hercynian movement and late fractures are developed in Caledonian movement, early fractures mainly control the Carboniferous palaeo-uplift. The decollement structure which developed in Himalayan period is favourable for the sealing and preservation of paleo-reservoir. So Cambrain subsalt structural traps have significant exploration potential.
Duan Yunjiang Huang Shaoying Xiao Zhongyao Yang Zhilin Luo Caiming Liao Feiran Yao Kun Ma Xiaodan. Analysis of the structural deformation characteristics of the Kalpin fold thrust zone[J]. Chinese Journal of Geology, 2019, 54(1): 17-33.