In-situ stress state in the China’s Sea and adjacent areas
- 15 Downloads
Based on 141 data of in-situ stress orientations data of breakouts, stress reliefs and hydraulic fracture tests, and some data of stress magnitudes from oil-well hydrofracturing operations, this paper discusses in-situ stress regime and the tectonic stress provinces in the China’s Sea and adjacent areas. Furthermore, the origin of tectonic stress field is expounded.
The research results show that the tectonic stress in China’s Sea region can be divided into some stress provinces which are the extension of the Northern China and Southern China stress provinces toward the eastern sea area. The tectonic stress field in the Bohai and Huanghai and their neighbouring regions is controlled by a ENE-WSW compression, where the faulting types are mainly strike-slip. However, the stress in the East and South China’s sea region and the Taiwan Straits is dominated by the WNW-NW-NNW compressions, that is to say that the orientations of the maximum horizontal stress spread radially from the central mainland toward southeastern sea areas. The principal stress directions become more and more steady and uniform as depth increases. In the North China and nearby areas, the types of faulting are primarily strike-slip. In Southern China and adjacent sea areas, there is a transition layer at 1,700M depth, the faultings principally show reverse faults above that depth and strike-slip below it. Furthermore the origin of the tectonic stress field in this region may primarily come from the composite action of the Pacific, the Philippine sea and the India-Australian plates.
Key Wordsin-situ stress regime tectonic stress field faulting
Unable to display preview. Download preview PDF.
- Ding, J. M., Liang, G. P. and Guo, Q. L., 1986. Stress measurements in deep boreholes in the Bohai coastal area of Shandong province: determination of the orientation of the principal stress.Journal of Seismology,1, 1–9 (in Chinese).Google Scholar
- Ding, J. M., Liang, G. P., Guo, Q. L., and Gao, J. L., 1988. The orientation of crustal stress determined from borehole breakouts.Acta Seismologica Sinica,1, 33–43 (in English).Google Scholar
- Ding, X. C. and Zhang, W. T., 1988. State of mordern tectonic stress field in East China mainland.Acta Seismologica Sinica,10, 25–38 (in Chinese).Google Scholar
- Gao, J. L., Ding, J. M., Liang, G. P. and Guo, Q. L., 1987. Variation of crustal stress with depth in the basins of North China.Earthquake Research in China,3, 4, 82–89 (in Chinese).Google Scholar
- Guo, Q, L. Ding, J. M. and Liang, G. P., 1986. The orientation of crustal stress determined from the borehole breakouts in Tangshan area.Earthquake Research in China,2, 3, 54–59 (in Chinese).Google Scholar
- Huang, F. L., 1986, On crustal structure and plutonic processes of the South China Sea.Marine Geology and Quaternay Geology,6, 1, 31–42 (in Chinese).Google Scholar
- Li, F. Q. and Liu, G. X., 1986. The present state of stress in China and related problems.Acta Seismologica Sinica,8, 2, 156–171 (in Chinese).Google Scholar
- Li, L. L., 1985. Orientation of the South China Sea and its tectonic relationship to the adjacent regions.Marine Geology and Quaternary Geology,5, 1, 71–82 (in Chinese).Google Scholar
- Liang, G. P., Ding, J. M., Guo, Q. L. and Gao, J. L., 1988. Determination of the orientation of the crustal stress in central Hebei plain by borehole breadout method.Journal of Seismological Research,11, 1, 49–58 (in Chinese).Google Scholar
- Lim, H. U. and Lee, C. I., 1986. In-situ stress measurements at some different Geological formation in Korea.Proceedings of the international symposium on engineering in complex rock formations.121–127 (in English).Google Scholar
- Lin, J. Z., Liang, G. Z., Zhao, Y. and Xie, M. F., 1980. Focal mechanism and tectonic stress field of coastal Southeast China.Acta Seismologica Sinica,5, 245–257 (in Chinese).Google Scholar
- Ma, X. Y., 1987.The Sketch of the Lithosphere Dynamics of China. (Explanatory text of the map of the lithosphere dynamics in China and adjacent areas). Geology Press (in Chinese).Google Scholar
- Wang, S. Y. and Xu, Z. H., 1985. Seismo-tectonic stress field in East China.Acta Seismologica Sinica,7, 17–32 (in Chinese).Google Scholar
- Wang, S. Y., Xu, Z. H. and Ge, M., 1987. Seismotectonic stress field in eastern sea area of China.Earthquake Research in China,3, 18–25 (in Chinese).Google Scholar
- Xu, Z. H., Yan, M. and Zhao, Z. H., 1983. Evoluation of the direction of tectonic stress in North China from recorded data of a large number of small earthquaeks,Acta Seismologica Sinica,5, 268–279 (in Chinese).Google Scholar
- Yan, J. Q., Shi, Z. L., Wang, S. Y. and Huan, W. L., 1979. Some features of the recent tectonic stress field of China and environs,Acta Seismologica Sinica,1, 9–24 (in Chinese).Google Scholar
- Zhuo, X. R. and Chen, G. T., 1983. On the focal mechanisms of earthquaeks regional stress field of the Fujian—Taiwan region,Acta Seismolgica Sinica,5, 398–411 (in Chinese).Google Scholar