Abstract
The Daba Mountains define the southern margin of the East Qinling orogenic belt, and form the boundary of the Sichuan basin in the north and northeast. The Daba Mountains can be divided into two structural belts by the NW-striking Chengkou fault, namely the northern Dabashan thrust-nappe belt and the southern Dabashan foreland fold-and-thrust belt. The southern Dabashan fold-and-thrust belt is a southwestward extruding thin-skinned thrust wedge, showing obvious belted change in deformation style and deformation intensity along the dip direction, and can be divided further into three sub-belts, i.e. the imbricate thrust sub-belt characterized by imbricate stepped-thrust sheets, the thrust-fold sub-belt characterized by the combination of the equally-developed thrusts and related folds, and the detachment-fold sub-belt characterized by box folds and closed overturned-isoclinal folds on the outcrops. Several kinds of structures have been recognized or inferred, including imbricate thrust system, passive-roof duplex (triangle zone), fault-related folds, back-thrust system and pop-up structure. The NE-SW compressive stress from the Qinling orogenic belt and detachment layers in the covering strata are the two most important determinants of deformation style. After the collision between the North China block and Yangtze block at the end of the Middle Triassic, the northward intracontinental subduction along the southern edge of the Qinling orogenic belt was initiated, which led to the corresponding southward thrusting in the upper crust. The thrusting propagated towards the foreland through the Jurassic and extended to the southernmost part of the southern Daba Mountains around the end of the Early Cretaceous, with thrusting deformation to be preferentially developed along major detachment layers and progressing upwards from the Lower Sinian through the Lower Cambrian and Silurian to Middle-Lower Triassic.
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References
Banks C J, Warburton J (1986). “Passive-roof” duplex geometry in the frontal structures of the Kirthar and Sulaiman Mountain belts, Pakistan. Journal of Structural Geology, 8(3–4): 229–237
Cao J M, Zhu J S, Wu D C (1994). Velocity structure of the crust in eastern Qinling Mountain. Journal of Chengdu University of Technology, 21(1): 11–17 (in Chinese with English abstract)
Cheng R H, Wang P J, Liu W Z, et al (2004). Response of Triassic sequence stratigraphy of Lower Yangtze to collision between Yangtze plate and North China plate. Geotectonica et Metallogenia, 28(2): 134–141 (in Chinese with English abstract)
Dahlstrom C D A (1970). Structural geology in the eastern margin of the Canadian Rocky Mountains. Bulletin of Canadian Petroleum Geology, 18: 332–406
Elliott D (1977). Some aspects of the geometry and mechanics of thrust belts. C.S.P.G. Seminar 8, pt 1, 2
Gao C L, Liu G X, Zhang Y Z, et al (2003). Thrusting nappe structure and oil-gas potential in eastern Qinling and Daba Mountain. Petroleum Geology & Experiment, 25(Suppl): 523–531 (in Chinese with English abstract)
Guo Z W, Deng K L, Han Y H (1996). The Formation and Development of Sichuan Basin. Beijing: Geological Publishing House, 1–200 (in Chinese)
Harding T P, Lowell J D (1979). Structural styles, their plate tectonic habitats and hydrocarbon traps in petroleum provinces. AAPG Bull, 63: 1016–1058
He J K, Lu H F, Zhang Q L, et al (1997). The thrust tectonics and it’s transpressive geodynamics in southern Dabashan Mountains. Geological Journal of China Universities, 3(4): 419–428 (in Chinese with English abstract)
Huang J J (2000). Research on the stress fields in superposed fold area: An example from northeastern Sichuan. Scientia Geologica Sinica, 35(2): 140–150 (in Chinese with English abstract)
Jamison W R (1987). Geometric analysis of fold development in overthrust terranes. Journal of Structural Geology, 9(2): 207–219
Jamison W R (1992). Stress controls on fold thrust style. In: McClay K R, ed. Thrust Tectonics. London: Chapman & Hall, 155–164
Jia C Z, He D F, Lei Z Y, et al (2000). Oil and Gas Exploration in Foreland Thrust Belts. Beijing: Petroleum Industry Press, 1–106 (in Chinese)
Jones P B (1982). Oil and gas beneath east-dipping underthrust faults in the Alberta foothills. In: Powers R B, ed. Geologic Studies of the Cordilleran Thrust Belt. Denver: Rocky Mountain Association of Geologists, 61–74
Li J Y (2001). Pattern and time of the collision between the Sino-Korean and Yangtze blocks: Evolution of the Sinian-Jurassic sedimentary settings in the Middle-Lower Reaches of the Yangtze River. Acta Geologica Sinica, 75(1): 25–34 (in Chinese with English abstract)
Li Z W, Luo Y H, Liu S G, et al (2005a). Acoustic emission experiment and estimation of tectonic paleostress in reservoir rocks of upper Triassic and Jurassic, the northeast of Sichuan, China. Journal of Chengdu University of Technology (Science & Technology Edition), 32(6): 614–620 (in Chinese with English abstract)
Li Z W, Luo Y H, Liu S G, et al (2005b). The experimental analysis of mechanical properties of compact reservoir rocks under formation conditions, northeast of Sichuan basin, China. J Mineral Pertrol, 25(4): 52–60 (in Chinese with English abstract)
Liu H F, Wang Z C, Xiong B X, et al (2000). Coupling analysis of Mesozoic-Cenozoic foreland basin and mountain system in central and western China. Earth Science Frontiers, 7(3): 55–72 (in Chinese with English abstract)
Liu J H, Liu F T, Sun R M, et al (1995). Seismic tomography beneath the Qinling-Dabie orogenic belts and both the northern and southern fringes. Acta Geophysica Sinica, 38(1): 46–54 (in Chinese with English abstract)
Liu S, Liu S G, Li Z W, et al (2005). Analysis of joints from the Meso-Cenozoic tectonic stress field in the west section of south Dabashan fault-fold belt in China. Journal of Chengdu University of Technology (Science & Technology Edition), 32(4): 345–350 (in Chinese with English abstract)
Lu X X (1991). Granitoid in eastern Qinling. In: Ye L J, Qian X L, Zhang G W, eds. Collected Works of Academic Discussion on Qinling Orogenic Belts. Xi’an: Northwest University Press, 250–260 (in Chinese)
Luo Z L (1998). New recognition of basement in Sichuan basin. Journal of Chengdu University of Technology, 25(2): 191–200 (in Chinese with English abstract)
Meng Q R, Zhang G W (2000). Geologic framework and tectonic evolution of the Qinling orogen, central China. Tectonophysics, 323:183–196
Morse J (1977). Deformation in ramp regions of overthrust faults: experiments with small-scale rock models. In: Heisey E L, Lawson D E, Norwood E R, et al, eds. Rocky Mountain Thrust Belt: Geology and Resources. Casper: Guidebook-Wyoming Geological Association, 29: 457–470
Price R A, Mountjoy E W (1971). Geologic structure of the Canadian Rocky Mountains between Bow and Athabasca Rivers-A progress report. In: Wheeler J O, ed. Structure of the Southern Canadian Cordillera. Geological Association of Canada, Special Paper 6, 7–26
Ren J S, Wang Z X, Chen B W, et al (1999). Tectonic Map of China and Adjacent Region. Beijing: Geological Publishing House (in Chinese)
Sun Z C, Qiu Y Y, Guo Z W (1991). On the relationship of the intraplate deformation and the secondary formation of oil/gas pools-The general regularities of the oil/gas formation in marine environment of the Yangtze area. Petroleum Geology and Experiment, 13(2): 107–142 (in Chinese with English abstract)
Suppe J (1983). Geometry and kinematics of fault-bend folding. American Journal of Science, 283(7): 684–721
Suppe J, Medwedeff D A (1990). Geometry and kinematics of faultpropagation folding. Eclogae Geologicae Helvetiae, 83(3): 409–454
Tao H X, He H Y, Wang Q Q, et al (1993). Historical evolution of tectonic in north rim of Yangzi plate. Xi’an: Northwest University Press, 141 (in Chinese)
Wang Z C, Zou C N, Tao S Z, et al (2004). Analysis on tectonic evolution and exploration potential in Dabashan foreland basin. Acta Petrolei Sinica, 25(6): 23–28 (in Chinese with English abstract)
Xu Z Q, Lu Y L, Tang Y Q, et al (1986). Deformation characteristics and tectonic evolution of the eastern Qinling orogenic belt. Acta Geologica Sinica, 60(3): 237–247 (in Chinese with English abstract)
Yue G Y (1998). Tectonic characteristics and tectonic evolution of Dabashan orogenic belt and its foreland basin. J Mineral Petrol, 18(Suppl): 8–15 (in Chinese with English abstract)
Yue G Y, Du S Q, Huang J J, et al (1996). Principle of structural compounding-combine: Analysis of structural association-superposition in Sichuan basin and Guizhou plateau, China. Chengdu: Press of Chengdu University of Science and Technology, 281 (in Chinese)
Zhang G W, Zhang B R, Yuan X C, et al (2001). Qinling Orogenic Belt and Continental Dynamics. Beijing: Science Press, 1–855 (in Chinese)
Zhang H F, Zhang B R, Zhao Z D, et al (1996). Continental crust subduction and collision along Shangdan tectonic belt of East Qinling, China-Evidence from Pb, Nd and Sr isotopes of granitoids. Science in China (Series D), 39(3): 273–282
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Translated from Geotectonica et Metallogenia, 2006, 30(3): 294–304 [译自: 大地构造与成矿学]
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Li, Z., Liu, S., Luo, Y. et al. Structural style and deformation mechanism of the southern Dabashan foreland fold-and-thrust belt, central China. Front. Earth Sci. China 1, 181–193 (2007). https://doi.org/10.1007/s11707-007-0023-4
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DOI: https://doi.org/10.1007/s11707-007-0023-4