Segment,Linkage,and Extensional Fault-Related Fold in Western Liaodong Bay Subbasin,Northeastern Bohai Sea,China |
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Authors: | Yang Minghui Zhou Xinhuai Wei Gang Liu Le Li Chunxia Zheng Xiaofeng Liu Xiaojian Gao Libao |
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Abstract: | The western Liaodong (辽东) Bay subbasin displays examples of segment,linkage of extensional fault,and fault-related folds.The Liaoxi (辽西) extensional fault system consists of a series of NNE- and NE-trending segments that were linked through relay ramps.The fault hanging walls are characterized by a series of en echelon synclines with axial traces sub-parallel to the faults.The synclines are doubly plunging located on the hanging wall of normal faults,with the strata dip sub-parallel to the fault.These folds result from along-strike displacement variations of the individual fault segments,as well as from extensional fault-related folding.In the study area,the synclines are separated by transverse intra-basin highs and relay ramps that formed where segment linkage occurred.These hanging wall synclines and their relation to fault displacement variations indicate that they are formed by extensional fault-related fold. |
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Keywords: | extension fault-related folding fault segment fault linkage Liaodong Bay subbasin Bohai Sea |
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