NUMERICAL SIMULATION OF FORELAND BASIN EVOLUTION IN NANSHA TROUGH SINCE MIDDLE MIOCENE
-
摘要: 为了理解南沙海槽前陆盆地演化过程及其动力学特征,基于中科院南海海洋研究所过去数十年获得的地球物理数据和最新国内外研究成果,在深入分析盆地构造史、沉积特征等之后,建立了中中新世以来南沙海槽前陆盆地弹性岩石圈板挠曲模型,并采用有限差分数值方法来模拟盆地演化。通过模拟重建了盆地沉积沉降、构造活动、挠曲变形动态演化过程,预测了不同演化阶段盆地的几何形态、重力异常、沉积厚度等结果。模拟实验预测的0Ma阶段重力异常和盆地地形与实测数据拟合良好;同时模拟结果显示南沙海槽前陆盆地由构造沉积负载造成的最大盆地挠曲仅约2 300 m,结合地质资料表明区域地壳在前陆盆地形成之前已经挠曲,且盆地挠曲可能受深部岩石圈负载作用。Abstract: In order to better understand the mechanism and characteristic of foreland basin evolution in the NanSha trough, we studied the structure, sedimentology and other characteristics of the basin based on the geophysical data of the past decades collected from South China Sea Institute and recent research progress both at home and abroad. An elastic lithospheric plate flexure model for Nansha Trough foreland basin is established. The finite difference method was used to simulate the basin evolution since Middle Miocene. With the model, we reconstructed the history of deposition, subsidence, tectonic movement and deflection and deformation process in the basin, and predicted the geometry, gravity anomaly, sediment thickness of the basin in different stages. The predicted gravity anomaly and basin topography fit well with the measured data at 0 Ma stage. And the basin simulation shows that basin deflection caused by the sediment load is only about 2 300 m, indicating that the basin crust had been flexible before the formation of foreland basin, and the flexural deformation of the foreland basin is not only related to basin structure, topography and depositional load, but also possibly affected by lithospheric load in the deeper part.
-
Key words:
- Nansha Trough /
- foreland basin /
- evolution /
- numerical simulation /
- middle Miocene
-
-
[1] Li Q, Jian Z, Su X. Late Oligocene rapid transformations in the South China Sea[J]. Marine Micropaleontology, 2005, 54(1-2):5-25.
[2] Zhou D, Yao B. Tectonics and sedimentary basins of the South China Sea:Challenges and progresses[J]. Journal of Earth Science, 2009, 20(1):1-12.
[3] Hinz K, Fritsch J, Kempter E, et al. Thrust tectonics along the north-western continental margin of Sabah/Borneo[J]. Geologische Rundschau, 1989, 78(3):705-730.
[4] Ingram G, Chisholm T, Grant C, et al. Deepwater North West Borneo:hydrocarbon accumulation in an active fold and thrust belt[J]. Marine and Petroleum Geology, 2004, 21(7):879-887.
[5] Franke D, Barckhausen U, Heyde I, et al. Seismic images of a collision zone offshore NW Sabah/Borneo[J]. Marine and Petroleum Geology, 2008, 25(7):606-624.
[6] Morley C, Leong L. Evolution of deep-water synkinematic sedimentation in a piggyback basin, determined from three-dimensional seismic reflection data[J]. Geosphere, 2008, 4(6):939-962.
[7] Hesse S, Back S, Franke D. The deep-water fold-and-thrust belt offshore NW Borneo:Gravity-driven versus basement-driven shortening[J]. Geological Society of America Bulletin, 2009, 121(5-6):939-953.
[8] Morley C. Growth of folds in a deep-water setting[J]. Geosphere, 2009, 5(2):59-89.
[9] Morley C. Geometry of an oblique thrust fault zone in a deepwater fold belt from 3D seismic data[J]. Journal of Structural Geology, 2009, 31(12):1540-1555.
[10] Hesse S, Back S, Franke D. The structural evolution of folds in a deepwater fold and thrust belt-a case study from the Sabah continental margin offshore NW Borneo, SE Asia[J]. Marine and Petroleum Geology, 2010, 27(2):442-454.
[11] 刘海龄, 郭令智, 孙岩,等. 南沙地块断裂构造系统与岩石圈动力学研究[M]. 北京:科学出版社, 2002:2-14.[LIU Hailing, GUO Llinzhi, SUN Yan, et al. Study on Fault System in Nansha Block(South China Sea) and the Block's Lithospheric Dynamics[M]. Science Press, 2002:2
-14.]
[12] Yan P, Liu H. Tectonic-stratigraphic division and blind fold structures in Nansha Waters, South China Sea[J]. Journal of Asian Earth Sciences, 2004, 24(3):337-348.
[13] 苏达权, 黄慈流, 夏戡原. 论南沙海槽的地壳性质[J]. 地质科学, 1996, 31(4):409-415.
[SU Daquan, HUANG Ciliu, XIA Kanyuan. The crust in the NanSha trough[J]. Scientic Geologica Sinica,1996:31(4):410-415.]
[14] 詹文欢, 刘以宣, 钟建强. 南海南部地洼区新构造运动及其动力学机制[J]. 大地构造与成矿学, 1995, 19(2):95-103.
[ZHAN Wenhuan, LIU Yixuan, ZHONG Jianqiang. The preliminary analysis of neotectonic movement and dynamic evolution in the southern Diwa region of south China Sea[J]. Geotectonica et Metallogenia, 1995, 19(2):95-103.]
[15] 陈雪, 许时耕. 南沙海槽南缘逆掩推复构造地区的动力学分析[J]. 海洋学报, 2002, 24(1):74-85.
[CHEN Xue, XU Shigeng. Dynamic analysis of nappe structure region in the southern margin of the Nansha Trough[J]. Acta Oceanologica Sinica, 2002,24(1):74-85.]
[16] 陈普刚, 周蒂. 南沙海槽盆地演化的有限元模拟[M]//南沙群岛及其邻近海域地质地球物理与油气资源. 北京:科学出版社, 1996:192-198.[CHEN Pugang, ZHOU Di. Finite element modelling of Nansha Basin evolution[M]//Geology, Geophysics and Oil and Gas Resources in Nansha Islands and Adjacent Waters. Beijing:Science Press, 1996:192
-198.]
[17] King R, Back G, Morley C, et al. Balancing deformation in NW Borneo:Quantifying plate-scale vs. gravitational tectonics in a Delta and Deepwater Fold-Thrust Belt System[J]. Marine and Petroleum Geology, 2010, 27(1):238-246.
[18] 吴世敏, 周蒂, 刘海龄. 南沙地块构造格局及其演化特征[J]. 大地构造与成矿学, 2004, 28(1):23-28.
[WU Shiming, ZHOU Di, LIU Hailing. Tectonic framework and evolutionary charateristics of Nansha block,South China Sea[J]. Geotectonica et Metallogenia, 2004,28(1):23-28.]
[19] 金庆焕, 李唐根. 南沙海域区域地质构造[J]. 海洋地质与第四纪地质, 2000, 20(1):1-8.
[JIN Qinghuan, LI Tanggen. Regional geologic tectonics of NanSha sea area[J]. Marine Geology and Quaternary Geology,2000, 20(1):1-8.]
[20] Shi X, Qiu X, Xia K, et al. Characteristics of surface heat flow in the South China Sea[J]. Journal of Asian Earth Sciences, 2003, 22(3):265-277.
[21] Suppe J, Chou G T, Hook S C. Rates of folding and faulting determined from growth strata[C]//Thrust Tectonics. London:Chapman & Hall, 1992.
[22] Shaw J, Suppe J. Active faulting and growth folding in the eastern Santa Barbara Channel, California[J]. Geological Society of America Bulletin, 1994, 106(5):607-627.
[23] Hall R. Cenozoic plate tectonic reconstructions of SE Asia[J]. Geological Society London Special Publications, 1997, 126(1):11-23.
[24] Hall R. Cenozoic geological and plate tectonic evolution of SE Asia and the SW Pacific:computer-based reconstructions, model and animations[J]. Journal of Asian Earth Sciences, 2002, 20(4):353-431.
[25] Hutchison C, Bergman S, Swauger D, et al. A Miocene collisional belt in north Borneo:uplift mechanism and isostatic adjustment quantified by thermochronology[J]. Journal of the Geological Society, 2000, 157(4):783-793.
[26] Simons W, Socquet A, Vigny C, et al. A decade of GPS in Southeast Asia:Resolving Sundaland motion and boundaries[J]. Journal of Geophysical Research, 2007, 112B06420,doi:10.1029/2005JB003868.
[27] Tingay M, Hillis R, Morley C, et al. Present-day stress orientation in Brunei:a snapshot of ‘prograding tectonics’ in a Tertiary delta[J]. Journal of the Geological Society, 2005, 162(1):39-49.
[28] Hutchison C. Marginal basin evolution:the southern South China Sea[J]. Marine and Petroleum Geology, 2004, 21(9):1129-1148.
[29] 姚伯初, 万玲, 刘振湖. 南海海域新生代沉积盆地构造演化的动力学特征及其油气资源[J]. 地球科学-中国地质大学学报, 2004, 29(5):543-549.
[YAO Bochu, WAN Ling LIU Zhenhu. Tectonic dynamics of Cenozoic sedimentary basins and hydrocarbon resources in the South China sea[J]. Earth Science -Journal of China University of Geosciences, 2004,29(5):543-549.]
[30] 万玲, 姚伯初, 吴能友,等. 南海西部海域新生代地质构造[J]. 海洋地质与第四纪地质, 2005, 25(2):45-52.
[WAN Ling, YAO Bochu, WU Nengyou, et al. Cenozoic geological characteristics in the west of the south china sea[J]. Marine Geology and Quaternary Geology, 2005,25(2):45-52.]
[31] Hutchison C, Vijayan V. What are the Spratly Islands?[J]. Journal of Asian Earth Sciences, 2010, 39(5):371-385.
[32] Hutchison C. The North-West Borneo Trough[J]. Marine Geology, 2010, 271(1-2):32-43.
[33] Hiscott R. Depositional sequences controlled by high rates of sediment supply, sea-level variations, and growth faulting:the Quaternary Baram Delta of northwestern Borneo[J]. Marine Geology, 2001, 175(1-4):67-102.
[34] 张翀, 吴世敏, 丘学林. 南海南部海区前陆盆地形成与演化[J]. 海洋地质与第四纪地质, 2007, 27(1):61-70.
[ZHANG Chong, WU Shimin, QIU Xuelin. Formation of foreland basin in the south of the South China Sea[J]. Marine Geology and Quaternary Geology, 2007,27(1):61-70.]
[35] Haq B, Hardenbol J, Vail P. Chronology of fluctuating sea levels since the Triassic[J]. Science, 1987, 235(4793):1156-1167.
[36] Cullen A. Transverse segmentation of the Baram-Balabac Basin, NW Borneo:refining the model of Borneo's tectonic evolution[J]. Petroleum Geoscience, 2010, 16(1):3-29.
[37] Turcotte D L, Schubert G. Geodynamics:Applications of Continuum Physics to Geological Problems[M]. New York:John Wiley & Sons Inc, 1982.
[38] Garcia-Castellanos D, Fernandez M, Torne M. Numerical modeling of foreland basin formation:a program relating thrusting, flexure, sediment geometry and lithosphere rheology[J]. Computers & Geosciences, 1997, 23(9):993-1003.
[39] Prezzi C, Uba C, G Tze H. Flexural isostasy in the Bolivian Andes:Chaco foreland basin development[J]. Tectonophysics, 2009, 474(3-4):526-543.
[40] Clift P, Lin J, Barckhausen U. Evidence of low flexural rigidity and low viscosity lower continental crust during continental break-up in the South China Sea[J]. Marine and Petroleum Geology, 2002, 19(8):951-970.
[41] 黄维, 汪品先. 渐新世以来的南海沉积量及其分布[J]. 中国科学D辑, 2006, 36(9):822-829.
[HUANG Wei, WANG Pinxian. South China Sea deposition and its distribution since the Oligocene[J]. Science in China(Series D:Earth Sciences), 2006,36(9):822-829.]
[42] Garcia-Castellanos D. Interplay between lithospheric flexure and river transport in foreland basins[J]. Basin Research, 2002, 14(2):89-104.
-
计量
- 文章访问数: 1064
- PDF下载数: 0
- 施引文献: 0
下载: