Journal of Tropical Oceanography ›› 2012, Vol. 31 ›› Issue (3): 144-154.doi: 10.11978/j.issn.1009-5470.2012.03.019cstr: 32234.14.j.issn.1009-5470.2012.03.019

• Marine geomorphology • Previous Articles     Next Articles

Discussion on the influence of weakness body on inversion structure deformation through analogue modeling and its application

XU Zi-ying1,2, SUN Zhen1*, ZHOU Di1, ZHANG Yun-fan1, SUN Long-tao1, ZHAO Zhong-xian1,2   

  1. 1. CAS Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; 
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-04-27 Revised:2011-05-26 Online:2012-09-11 Published:2012-09-11

Abstract: Deep-sea basin structural deformation indicated that the exist of weakness body in continental margin not only make the sedimentation deformation stronger in rift stage but also make the uplift-fold stronger in inversion stage. In order to investigate the impact of weakness body on structural deformation, we carried out four sets of analogue modeling experiments. Based on the modeling results, we discussed the impact of weakness body on inversion structure deformation in the southwest of the Qiongdongnan Basin. The modeling experiments show that no matter in extension stage or in compression stage, the inversion structural deformation first appears and propagates in weakness zone, the location and the stress direction of weakness body play an important role in the deformation of inversion structure. Based on comparison of modeling results with the actual structures, it is concluded that the deformation of inversion structure in southwest of the Qiongdongnan Basin is mainly influenced by the existence of weakness body and oblique compression; the oblique compression tectonic stress may come from the northwest of the basin and keep its relationship with the revolved Indochina Block by inference.

Key words: weakness body, inversion structure, analogue modeling, tectonic stress, Qiongdongnan Basin

CLC Number: 

  • P736