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- Title
Discrete Element Numerical Simulation of Extensional Tectonics-Examples of Qiongdongnan Basin.
- Authors
ZHANG Yinzhao; LI Changsheng; ZHU Jitian; YIN Hongwei; XIONG Xiaofeng; WU Zhenyun
- Abstract
The present terrestrial heat flow in Qiongdongnan Basin shows a certain distribution law of heat flow in space. The basement of the low-heat flow region in the eastern part of the basin is rigid, while the basement of the high-heat flow region in the basin is toughness. In this paper, considering the influence of basement lithology ( rigidity and toughness ) on the development of fault assemblage in Qiongdongnan Basin, two sets of numerical simulations are carried out. The simulation results show that the overlying strata of the rigid basement is a listric half-graben structure, with asymmetrical one-side step-like graben. One side of the fault depression is a gentle slope, and the boundary of the other side is a normal fault with a large slope. However, the depressions and bulges of the toughness basement are spaced, and secondary faults is often found in the depressions, with a large number of faults and a small fault interval for a single fault. The secondary and tertiary faults in the depressions are also affected by the stiffness and toughness of the basement. In the depressions of the upper part of the rigid basement, there are mainly positive dip faults with the same tendency as the extensional stress, while in the upper part of the toughness basement, there are several groups of faults with the opposite tendency.
- Subjects
TERRESTRIAL heat flow; COMPUTER simulation; RIFTS (Geology)
- Publication
Research & Exploration in Laboratory, 2019, Vol 38, Issue 11, p78
- ISSN
1006-7167
- Publication type
Article