Abstract
The Wan An Basin, a major basin located in the southwestern part of the South China Sea, is suggested to be closely related to the extrusion of the Indo-China Block. But the published documentation about the Wan An Basin is very sparse. High-resolution seismic reflection profiles obtained by the petroleum industry along the southwestern margin of the South China Sea provide us a chance to study the characteristics of the Wan-An fault and its relationship to the Wan-An Basin. The Wan-An Fault staggered strata in the Wan-An Basin and formed negative flower structures. The deformation related to the Wan-An fault is localized along the fault, while the strata away from the strike-slip fault were not affected. The characteristics of strike-slip extensional basin are not obvious in the Wan-An Basin. However, this basin has obvious characteristics of rift basin. Initial analysis shows that the Wan-An Basin should be a continental margin rift basin.
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References
Ben-Avraham, Z. and Emery, K O. (1973) Structural framework of Sunda Shelf. AAPG Bull., v.57(12), pp.2323–2366.
Briais, A, Patriat, P. and Trapponier, P. (1993) Updated interpretation of magnetic anomalies and seafloor spreading stages in the South China Sea: implications for the Tertiary tectonics of Southeast Asia. Jour. Geophys. Res., v.98, pp.6299–6328.
Clift, P., Lee, G.H., Duc, N.A., Barckhausen, U., Van, L.H. and Zhen, S. (2008) Seismic reflection evidence for a Dangerous Grounds miniplate: No extrusion origin for the South China Sea. Tectonics, v.27, TC3008, doi:10.1029/207TC002216.
England, P. and Molnar, P. (1990) Right — lateral shear and rotation as the explanation for strike-slip faulting in eastern Tibet. Nature, v.344, pp.140–142.
Fyhn, M.B.W., Boldreel, L.O. and Nielsen, L.H. (2009) Geological development of the Central and South Vietnamese margin: Implications for the establishment of the South China Sea, Indochinese escape tectonics and Cenozoic volcanism. Tectonophysics, v.478, pp.184–214.
Guo, L.Z., Shi, Y.S. and Ma, R.S. (1983) Study on the formation and evolution of the Mesozoic — Cenozoic active continental margin and island arc tectonics of the western Pacific Ocean. Acta Geological Sinica, v.57(1), pp.11–21 (Chinese)
Hall, R. (2002) Cenozoic geological and plate tectonic evolution of SE Asia and the SW Pacific: computer-based reconstructions, models and animations. Jour. Asian Earth Sci., v.20, pp.353–431.
Hilde, T.W.C., Uyeda, S. and Kroenke, L. (1977) Evolution of the Western Pacific and its margin. Tectonophysics, v.38(1–2), pp.145–152, 155–165.
Huchon, P., Nguyen, T.N.H. and Chamot-Rooke, N. (1998) Finite extension across the south Vietnam basins from 3D gravimetric modelling: relation to South China Sea kinematics. Marine and Petroleum Geol., v.15(7), pp.619–634.
Huchon, P., Pichon, X.L. and Rangin, C. (1994) Indochina Peninsula and the collision of India and Eurasia. Geology, v.22, pp.27–30.
Hutchison, C.S. (2004) Marginal basin evolution: The southern South China Sea. Marine and Petroleum Geology, v.21, pp.1129–1148.
Jin, Q.H., Wu, J.M., Xie, Q.Y., et al. (2001) Analysis of sedimentary basins in the western waters of Nansha and their oil and gas resources. Wuhan: China University of Geosciences Press (Chinese).
Karig, D.E. (1971) Origin and development of marginal basin in the Western Pacific. Jour. Geophys. Res., v.76, pp.2543–2561.
Karig, D.E. (1973) Plate convergence between the Philippines and Ryuku Islands. Marine Geol., v.14, pp.153–168.
Lebedev, S., Chevrot, S. and Nolet, G. (2000) New seismic evidence for a deep mantle origin of the S. China basalts (the Hainan plume?) and other observations in SE Asia. EOS Trans. AGU, v.81, pp.48–148.
Lee, G.H., Lee, K. and Watkins, J.S. (2001) Geologic evolution of the Cuu Long and Nam Con Son Basins, offshore southern Vietnam, South China Sea. AAPG Bull., v.85(6), pp.1055–1082.
Lee, T.Y. and Lawver, L.A. (1993) Cenozoic plate reconstruction of the South China Sea region. Tectonophysics, v.235, pp.149–180.
Liu, B.M., Xia, B., Li, X.X., et al. (2006) The southeastern extension of Honghe fault zone and its tectonic evolution significance. Science in China Series D: Earth Sciences, v.49(8), pp.839–850.
Liu, H.L., Yan, P., Zhang, B.Y., et al. (2004) Role of the Wan-Na fault system in the western Nansha Islands (Southern South China Sea). Jour. Asian Earth Sci., v.23(2), pp.221–233.
Liu, Z.S., Yang, S.K., He, S.M., et al. (1983) The continental margin spreading of South China Sea and the cycle of evolution of marginal seas. Jour. Tropical Oceanography, v. 2(4), pp.251–259. (Chinese)
Nguyen, T.T.B., Tomochika, T., Hoang, P.S., et al. (2007) Present-day stress and pore pressure fields in the Cuu Long and Nam Con Son Basins, offshore Vietnam. Marine and Petroleum Geol., v.24, pp.607–615.
Rangin, C., Huchon, P., Pichon, X.L., et al. (1995) Cenozoic deformation of central and south Vietnam. Tectonophysics, v.251, pp.179–196.
Rangin, C., Klein, M., Roques, D., et al. (1995) The Red River fault system in the Tonkin Gulf, Vietnam. Tectonophysics, v.243, pp.209–222.
Schmidtke, E.A., Fuller, M.D. and Haston, R. (1990) Paleo-magnetic data from Sarawak, Malaysian Borneo, and the late Mesozoic and Cenozoic tectonics of Sundaland. Tectonics, v.9, pp.123–140.
Tapponnier, P., Peltzer, G., Le, D.A.Y., et al. (1982) Propagating extrusion tectonics in Asia: New insights from simple experiments with plasticine. Geology, v.10, pp.611–616.
Taylor, B. and Hayes, D.E. (1980) The tectonic evolution of the South China Basin. In: D.E. Hayes (Ed.), the Tectonic and Geologic Evolution of Southeast Asian Seas and Islands: Part 1. Geophys. Monogr. Amer. Geophys. Union, Washington D.C. v. 23, pp.89–104.
Tingay, M., Morley, C., King, R., et al. (2010) Present-day stress field of Southeast Asia. Tectonophysics, v.482: pp.92–104.
Wu, S.M., Qiu, X.L. and Zhou, D. (2005) Formation mechanism for basins on the western margin of South China Sea. Geotectonica Et Metallogenia, v.29(3), pp.346–353. (Chinese)
Xia, B., Zhang, Y., Cui X.J., et al. (2006) Understanding of the geological and geodynamic controls on the formation of the South China Sea: A numerical modelling approach. Jour. Geodynamics, v.42(1–3), pp.63–84.
Yan, P., Deng, H., Liu, H., et al. (2006) The temporal and spatial distribution of volcanism in the South China Sea region. Jour. Asian Earth Sci., v.27, pp.647–659.
Yao, B.C. (1996) Tectonic evolution of the South China Sea in Cenozoic. Marine Geol. Quaternary Geol., v.16(2), pp.1–13. (Chinese)
Zhang, G.X. and Yang, M.Z. (1999) Tectonic styles and traps of Wan-An Basin in South China Sea. Tropic Oceanology, v.18(1), pp.1–6. (Chinese)
Zhong, G.J. and Wang, L.L. (1996) The types of Cenozoic basins in the southwest of South China Sea and their evolution. Trans. Oceanology and Limnology, v.2, pp.24–32. (Chinese)
Zhou, D., Ru, K. and Chen, H.Z. (1995) Kinematics of Cenozoic extension on the South China Sea continental margin and its implications for the tectonic evolution of the region. Tectonophysics, v.251, pp.161–177.
Zhu, M.Z., Graham, S. and Mchargue, T. (2009) The Red River Fault zone in the Yinggehai Basin, South China Sea. Tectonophysics, v.476, pp.397–417.
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Wan, Z., Xia, B., Shi, Q. et al. The Wan-An fault and its relationship with the Wan-An Basin, western South China Sea. J Geol Soc India 81, 415–421 (2013). https://doi.org/10.1007/s12594-013-0052-4
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DOI: https://doi.org/10.1007/s12594-013-0052-4