Evolution and provenance of the Xuefeng intracontinental tectonic system in 1 South China: Constraints from detrital zircon fission track thermochronology

被引:13
|
作者
Zheng, Chen [1 ,2 ]
Xu, Changhai [1 ,2 ]
Brix, Manfred R. [3 ,4 ]
Zhou, Zuyi [1 ,2 ]
机构
[1] Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
[2] Tongji Univ, Sch Ocean & Earth Sci, Shanghai 200092, Peoples R China
[3] Ruhr Univ Bochum, Fac Geosci, D-44780 Bochum, Germany
[4] Ruhr Univ Bochum, Inst Geol Mineral & Geophys, D-44780 Bochum, Germany
基金
中国国家自然科学基金;
关键词
Zircon fission track; Tectonic evolution; Sediment provenance; Xuefeng Intracontinental Tectonic System; South China block; NORTHERN SICHUAN BASIN; U-PB AGES; JIANGNAN OROGEN; QINLING OROGEN; FORELAND BASIN; YANGTZE BLOCK; GEOCHRONOLOGICAL CONSTRAINTS; JURASSIC DEPOSITS; METAMORPHIC ROCKS; PRESSURE ECLOGITE;
D O I
10.1016/j.jseaes.2019.02.012
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The Xuefeng Intracontinental Tectonic System (XITS) is a large-scale compressional tectonic system in the central South China block. It is characterized by northeast-trending fold-thrust belts involving the Xuefeng zone, the Chevron syncline fold-thrust zone, the Chevron anticline fold-thrust zone and the Central Sichuan basin. This paper reports detrital zircon fission track (ZFT) analyses of the sandstones sampled from Neoproterozoic to Middle Jurassic sequences, and further discusses their relation with low-temperature tectonic evolution and sediment provenance. The totally annealed ZFT data of 452-377 Ma from the Neoproterozoic and Devonian sandstones were related to an Early Paleozoic low-temperature exhumation of the Jiangnan orogen due to intracontinental orogeny in the South China block. Those annealed ZFT components from Triassic to Jurassic sandstones, grouped 236-189 Ma, 189-142 Ma, and 142-124 Ma decreasingly from east to west structurally imply a northwestward progressively squeezing by the Xuefeng intracontinental orogeny as a result of the Paleo-Pacific subduction. The unannealed age components (411 Ma, 362-377 Ma, 270-216 Ma, and 209-183 Ma) of the Upper Triassic to Middle Jurassic sandstones, are comparable to the multistage tectonic evolution of the Qinling orogen through subduction, accretion and collision and are therefore indicative of sample potential provenance.
引用
收藏
页码:264 / 273
页数:10
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