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COMPRESSIONAL STRUCTURES OF THE TAN LU FAULT ZONE AND INVERSIONOF THE HEFEI BASIN SINCE NEOGENE

LIU Guo sheng, ZHU Guang, SONG Chuan zhong, NIU Man lan, WANG Dao xuan(College of Resources and Environmental Science, Hefei University of Technology, Hefei 230009, China)  
The Tan Lu Fault zone experienced intense thrusting since Neogene. Thus, inversion structures formed along the preexisted extensional faults, and the strata at the eastern edge of the Hefei basin were apparently tilted, giving rise to fault bend folds. Likewise,the Hefei basin was also subjected to compression and inversion, which were responsible for a series of small NW trending sinistral strike slip faults, and NNE trending arrested folds that favoured the trap and migration of hydrocarbon. The thrusting activity of the Tan Lu fault zone and the inversion structures of the Hefei basin took place in the regional dynamic setting that back arc spreading caused by westward subduction of the Pacific plate led to the almost EW compression of eastern China continent.
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