Title: CHARACTERIZATION OF THE PALEOGENE BOUNDARY FAULTS OF TANGYUAN AND FANGZHENG FAULT BASINS IN YISHU GRABEN IN HEILONGJIANG PROVINCE
Abstract: Lying in the east of Heilongjiang province, Yishu graben is a Cenozoic fault basin comprising two large second-class structural units, i.e., Tangyuan and Fangzheng fault basins. As a result, the structural study of the two units can help to find out the processes of formation and evolution of Yishu graben. Our results show that the activity of the boundary faults of Yishu graben is characterized by multiple centers and imbalance in Eocene-Oligocene epoch. The fault at the east boundary of Tangyuan fault basin is a basin-controlling fault, and the faults at both the east and the west boundaries of Fangzheng fault basin are also a basin-controlling fault, with the west boundary fault at Fangzheng being the major one. Analysis of the fault growth index shows that the NW fault within the graben is identical with the boundary fault in activity, and the two faults both serve to regulate the evolution and development of the boundary faults, and it was found that the transtension direction of the boundary faults of Yishu graben was determined by the Moho gradient tilt direction, since the latter is identical to the extension direction of the graben as a whole.
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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Cited By Count: 2
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