中文摘要：

中国东部的苏鲁造山带印支期先后经历了大洋消减俯冲、大陆碰撞、陆壳深俯冲、陆内造山等复杂过程。综合苏鲁造山带的构造地质学、岩石学、岩相古地理学、年代学进展,发现以下事实用传统的华南向华北俯冲难以解释：（1）徐淮地区形成了明显的朝北西拓展的逆冲构造变形,此外,苏鲁造山带中还存在大量的北西向逆冲推覆构造;（2）苏鲁造山带中出露的白垩纪花岗岩中来自古元古代的继承锆石,以及Sr、Nd、Pb同位素示踪结果都显示与华北地块南缘地质体更为相似;（3）苏鲁造山带北侧的胶莱盆地以及胶北隆起缺乏晚古生代到中生代的弧后火山岩证据;（4）华北南缘三叠纪时期的古地理环境更接近被动大陆边缘。基于这些事实,本文认为,晚古生代-早三叠世早期苏鲁段的商丹洋可能向南东俯冲,不同于秦岭-大别段的商丹洋向北俯冲,消减到秦岭-大别微陆块苏鲁段之下,发生华北地块与该微陆块的拼合,华北地块整体向南东楔入秦岭-大别微陆块,导致大别-苏鲁超高压岩石垂向折返剥露;中三叠世-晚三叠世,勉略洋自东向西的剪刀式闭合,华南地块向北秦岭-大别微陆块俯冲拼合,并逐渐将华南地块与华北地块之间的秦岭-大别微陆块向西、向北侧向挤出,到了中生代华北地块持续向南东俯冲并楔入华南地块,将苏鲁-大别造山带沿郯庐断裂错断并最终形成该区总体构造格局。

英文摘要：

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 paleo- geography in the Sulu Orogen, this paper reached the following conclusions that are different from the tra- ditional tectonic models of subduction of the South China Block under the North China Block. 1） In addi- tion 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 Ba- sin 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 Mi- croplate 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