海洋地质与第四纪地质2017，Vol.37Issue(4)：18-32,15.DOI:10.16562/j.cnki.0256-1492.2017.04.002
中国东部苏鲁造山带的印支期俯冲极性及其造山过程
TRIASSIC SUBDUCTION POLARITY AND OROGENIC PROCESS OF THE SULU OROGEN, EAST CHINA
摘要
Abstract
The Sulu Orogen,located in East China,has experienced a series of complex Indosinian tectonic processes including subduction of oceanic crust,continent-continent collision,deep continent subduction and intracontinental orogenism.After synthesis of recent researches on tectonics,petrology and paleogeography in the Sulu Orogen,this paper reached the following conclusions that are different from the traditional tectonic models of subduction of the South China Block under the North China Block.1) In addition to the NW thrusts in the Xu-Huai area,a large number of northwestward thrusts occur in the orogen.2) The existence of inherited Early Pterozoic zircon and the Sr-Nd-Pb isotopic tracers in the Cretaceous granites in the Sulu Orogen sugest the affinity of the orogen to the North China Block.3) In the Jiaolai Basin and the Jiaobei Uplift,there is no arc magmatism was recorded from Late Paleozoic to Mesozoic.4)The southern margin of the North China Block was a passive margin in Triassic.The Shangdan Ocean was subductd southeastward under the Qinling-Dabie Microplate in the Sulu segment,but northward in the Qinling-Dabie segment from Late Paleozoic to Early Triassic,which resuted in the collision of the North China Block and the Qinling-Dabie Microplate.The North China Block indented into the Qinling-Dabie Microplate and thus caused the vertical exhumation of the high pressure and ultra high pressure metamorphic rocks.During the Middle-Late Triassic,the northward scissors-type closure of the Mianlue Ocean resulted in an assembly of the South China Block to the Qinling-Dabie Microplate from west to east.The Qinling-Dabie Microplate between the North China and South China blocks was laterally extruded to the west and the north respectively.In the Mesozoic,together with the intracontinental subduction of the North China Block to the South China Block,the Sulu-Dabie Orogen was indented southeastwards by the North China Block.The tectonic setting in the Sulu Orogen and adjacent region was basically formed then.关键词
苏鲁造山带/俯冲极性/造山过程/印支期/剪刀式闭合Key words
Sulu Orogen/subduction polarity/orogenic process/Indosinian/scissors-type closure分类
天文与地球科学引用本文复制引用
李三忠,兰浩圆,张剑,郭润华,李少俊,郑祺亮,李玺瑶,赵淑娟,索艳慧,郭玲莉,王永明,周在征,刘晓光..中国东部苏鲁造山带的印支期俯冲极性及其造山过程[J].海洋地质与第四纪地质,2017,37(4):18-32,15.基金项目
国家自然科学基金杰出青年基金(41325009) （41325009）
山东省泰山学者特聘教授项目 （）
国家重点研发计划(2017YFC0601400-1) （2017YFC0601400-1）
鳌山卓越科学家计划(2015ASTP-0S10) （2015ASTP-0S10）
