Formation and evolution of Xianshuihe Fault Belt in the eastern margin of the Tibetan Plateau: Constraints from structural deformation and geochronology

Geological Journal - Tập 55 Số 12 - Trang 7953-7976 - 2020
Yingtao Chen1, Guowei Zhang2, Rukui Lu2, Tingting Luo3, Yang Li2, Wenxin Yu1
1College of Geology and Environment, Xi’an University of Science and Technology, Xi’an, China
2State Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi’an, China
3Research Institute, Shaanxi Yanchang Petroleum (Group) Co., Ltd., Xi'an, China

Tóm tắt

The Xianshuihe Fault Belt (XSF), along which the syntectonic Zheduoshan batholith was emplaced, has great significance for the reconstruction of the tectonic framework in the eastern margin of the Tibetan Plateau. In this contribution, formation process and evolution of the XSF are discussed based on the structural deformation in the field and the geochronology of Zheduoshan batholith. The results show that the XSF current arc‐shaped protrusion to the north‐east probably was formed by a fracture of the clockwise rotation compression that extended northward to the periphery with the eastern Himalayan tectonic syntaxis as the centre. It is a complex fault belt formed by the superposition of multi‐stage structures. In the early‐stage formation and evolution of the XSF, the Oligocene‐Miocene migmatite zone and Miocene granites of the Zheduoshan batholith were emplaced. Among them, the lower limit of the XSF's initial activity time was not less than 47 Ma that was limited by the Zircon U–Pb geochronology of migmatite zone formed under the compression system. During the emplacement of Miocene granites, the XSF underwent a process from compression to sinistral strike‐slip, and the geochronology indicates that the onset of the XSF sinistral strike slip should not be less than 14 Ma. After syntectic magmatism, the XSF also experienced the shear deformation (from ductile to brittle) with sinistral kinematics.40Ar‐39Argeochronology results show that the ductile shear deformation mainly occurred around 5.5–3.2 Ma and accompanied a staged and differential uplift from north to south. It extended to the south along the weak crustal zone of Anninghe, Daliangshan, Xiaojiang, and other faults, forming the Xianshuihe–Anninghe–Xiaojiang sinistral strike‐slip fault system on the eastern margin of the Tibetan Plateau, and large‐scale sinistral strike slip began around 5 Ma. Our new insights lay a foundation for understanding and dissecting the formation and evolution of the Tibetan Plateau eastern margin.

Từ khóa


Tài liệu tham khảo

10.1016/j.epsl.2017.12.045

10.1038/414738a

10.1029/2003JB002809

Cao J. L., 2009, Numerical simulation of GPS observed clockwise rotation around the eastern Himalayan syntax in the Tibetan Plateau, Chinese Science Bulletin, 54, 224

Chen W., 2006, Late Cenozoic episodic uplifting in southeastern part of the Tibetan Plateau‐evidence from Ar‐Ar thermochronology, Acta Petrologica Sinica, 22, 867

Chen Y.T.(2014).Tectonic connection and evolution between Longmenshan Tecetonic Belt and Sichuan‐Yunnan Tectonic Belt. (PhD Dissertation; pp. 1–174) Northwest University Xi'an China (in Chinese with English abstract).

Chen Y. T., 2013, Geometry and kinematics of the Xianshuihe Fault Belt in southwestern Sichuan, eastern Tibetan Plateau: Constraints from magnetic fabrics, Acta Petrologica Sinica, 29, 977

10.1007/s12303-014-0050-6

10.1130/0091-7613(2000)28<703:TOBTEM>2.0.CO;2

10.1007/s12594-012-0134-8

10.1007/s00531-014-1129-z

Fossen H., 2010, Structural geology, 8, 10.1017/CBO9780511777806

Guo S. S., 2007, Petrological and geochemical constraints on the origin of leucogranites, Earth Science Frontiers, 14, 290

Guo S. S., 2009, Petrochemical characteristics of leucogranite and a case study of Bengbu leucogranites, Chinese Science Bull, 54, 1923, 10.1007/s11434-009-0355-4

10.1029/2001TC001281

10.1016/j.gsf.2020.01.010

Hu J. M., 2005, SHRIMP U‐Pb dating of zircons from granitoid bodies in the Songpan‐Ganzi Terrane and its implications, Acta Petrologica Sinica, 21, 867

10.1093/petrology/44.2.255

10.1016/j.gsf.2019.11.001

10.1007/s11430-013-4649-7

10.1016/j.jog.2018.03.009

Li B. L., 2007, The spatial distribution of the foreland thrust tectonic deformation in the Circum‐Tibetan Plateau Basin and range system, Acta Geologica Sinica, 81, 1200

10.1016/j.tecto.2013.07.007

10.1016/j.jseaes.2015.03.038

Li H. L., 2016, Zircon U‐Pb study of two‐staged Oligo‐Miocene migmatization along the Xianshuihe Fault Zone, East Tibet Plateau, Earth Science Frontiers, 23, 222

10.1016/j.jseaes.2020.104328

Li Q., 2000, New evidence for the time of tectonic uplift and transformation of style ofmovement of Ailaoshan‐Red River shear zone, Science in China (Earth Sciences), 30, 576

Liu S. W., 2006, Timing, petrogenesis and geodynamic significance of Zheduoshan Granitoids, Acta Petrologica Sinica, 22, 343

Ludwig K. R., 2003, User's manual for Isoplot 3.0: A geochronological toolkit for Microsoft excel, 1

Mcdougall I., 1999, Geochronology and thermo chronology by the 40Ar/39Ar method, 199, 10.1093/oso/9780195109207.001.0001

10.1029/93RG02030

10.1016/0040-1951(94)00207-P

10.1016/j.tecto.2005.01.002

10.1016/j.gsf.2018.02.010

10.1016/0012-821X(94)00252-T

10.1016/S1367-9120(03)00089-0

10.1130/GES01244.1

SGS (Sichuan Geological Survey). (2003).KangdingSheet Regional Geological Survey Report(1:250 000) (in Chinese).

Song Z. J., 2008, Tectonite series in the middle‐southern segment of Ailao Shan‐Red River shear zone and their geological implication, 1

Sun S. S., 2007, Fluid inclusion planes measurement and paleostress field analysis for Cenozoic Gonggashan Granite, Geological Journal of China Universities, 13, 344

10.1126/science.105978

Tian Y, 2018, Petrogenesis and tectonic significance of Zheduoshan Miocene granite, Western Sichuan, 1

10.1130/G19562.1

10.1016/j.tecto.2010.03.017

Wang E., 1998, Late Cenozoic Xianshuihe‐Xiaojiang, Red River, and Dali fault systems of southwestern Sichuan and central Yunnan, China, Special Paper‐Geological Society of America, 327, 1

10.1038/ngeo1538

Wang E. Q., 2008, Mesozoic and Cenozoic tectonic evolution of the Longmenshan Fault Belt, Science in China (Earth Sciences), 38, 1221

10.1130/0091-7613(1998)026<0887:TEFTMO>2.3.CO;2

Wang Q., 2001, Present day crustal movement and tectonic deformation in Chinese mainland, Scinece in China (Earth Sciences), 31, 529

Wang S. J., 2014, Migmatite and its geodynamic implications, Earth Science Frontiers, 21

10.1016/j.jseaes.2005.11.001

Wang Z. X., 1997, Origin of the Zheduoshan Granite and its tectonic setting, Journal of Chengdu University of Technology, 24, 48

Wang Z. X., 1996, Study of deformation mechanism of the Xian Shui River fault zone – A shallow‐level, High‐temperature ductile shear zone, Regional Geology of China, 3, 244

Wu C., 2016, The relationship between the Xianshuihe Fault Zone and Yala Snow Mountain gneiss Dome in the Songpan‐Ganzi Orogenic Belt, Acta Geologica Sinica, 90, 2982

Xu Z. Q., 2008, Tectonics and fabric kinematics of the Namche Barwa Terrane, Eastern Himalayan syntaxis, Acta Petrologica Sinica, 24, 1463

Xu Z. Q., 1992, The orogeny of the Chinese Songpan‐Ganze orogen, 137

10.1016/S1872-5791(08)60066-4

Yuan H. L., 2003, Determination of U‐Pb age and rare earth element concentrations of zircons from Cenozoic intrusions in northeastern China by laser ablation ICP‐MS, Chinese Science Bull, 48, 2411, 10.1360/03wd0139

Zhang G. W., 2004, Western Qinling‐Songpan continental tectonic node in China's continental tectonics, Earth Science Frontiers, 11, 23

10.1360/02yd0042

Zhang P. Z., 2008, The present day tectonic deformation, strain partitioning and deep dynamic process of the western Sichuan region along eastern margin of the Tibetan Plateau, Science in China (Earth Sciences), 38, 1041

Zhang P. Z., 2003, Active tectonic blocks and strong easthquakes in the continent of China, Science in China (Earth Sciences), 46, 13

Zhang P. Z., 2013, Active faults, earthquake hazards and associated geodynamic processes in continental China, Scientia Sinica Terrae, 43, 1607

10.1130/G20554.1

Zhang P. Z., 2006, Iscussion on Late Cenozoic growth and rise of northeastern margin of the Tibetan Plateau, Quaternary Sciences, 26, 5

10.1016/j.epsl.2017.02.025

Zhang Y. Q., 2004, 40Ar/39Ar dating of shear deformation of the Xianshuihe Fault Zone in west Sichuan and its tectonic significance, Science in China (Earth Sciences), 34, 613

Zhang Y. Z., 2015, Tectonis chronology constraint on the main faults bounding the East Sichuan‐Yunnan Block and implication for Tibetan Plateau kinetics, 1

Thông tin
Thông tin xuất bản

Geological Journal

Tập 55 Số 12

7953-7976

Thông tin tác giả