LI Zhongquan,XU Shihai,YING Danlin and Han Jianhui State Key Loboratory of Oil and Gas Reservoir Geology and Exploration,Chengdu University ofTechnology,Chengdu,Sichuan 610059,PetroChina Company Limited Southwest Oil and Gas Field Company Exploration and Development Research Institute,Chengdu,Sichuan 610051
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Angular unconformity is one of the most direct and strongest evidences for approving the tectonic movements of the earth's crust. Its dynamic genesis process has been understood to be mainly related to the compressional setting for a long time. Especially, in a detailed structural analysis for a specific region, when an angular unconformity is discovered people would regard it as the result of orogenic movements of a certain period or a certain episode and neglect the extensional facts. Based on a dialectical point of view of extension-compression, this paper has proved that angular unconformities can be formed not only in compressional settings, but also in extensional ones. Further more, their geological features are compared and he possible genetic mechanisms for angular unconformity under different dynamic settings are studied.
LI Zhongquan, XU Shihai, YING Danlin, Han Jianhui State Key Loboratory of Oil, Gas Reservoir Geology, Exploration, Chengdu University ofTechnology, Chengdu, Sichuan, PetroChina Company Limited Southwest Oil, Gas Field Company Exploration, Development Research Institute, Chengdu, Sichuan .2004. Dynamic Features of Angular Unconformity Formation——Extensional and Compressional Angular Unconformities[J]. Acta Geologica Sinica(),78(1):
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