全球早古生代造山带(Ⅰ):碰撞型造山  

Global Early Paleozoic Orogens(Ⅰ):Collision-Type Orogeny

作　　者：李三忠[1,2,3] 杨朝[1,2] 赵淑娟[1,2] 李玺瑶 郭玲莉[1,2] 余珊[1,2] 刘鑫[1,2] 索艳慧[1,2] 兰浩圆 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]海底科学与探测技术教育部重点实验室,山东青岛266100 [3]青岛海洋科学与技术国家实验室海洋地质功能实验室,山东青岛266100

出　　处：《吉林大学学报（地球科学版）》2016年第4期945-967,共23页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金重大项目(41190072;41190070;U1606401);国家杰出青年基金项目(41325009);泰山学者特聘教授项目;鳌山卓越科学家计划项目~~

摘　　要：自新元古代罗迪尼亚超大陆裂解以来,早古生代是板块构造运动活跃时期,具有板块运动速度较快、构造格局不稳定、块体之间相互作用复杂多变等特征,造山带演化极其复杂,导致全球早古生代古大陆重建现今仍较模糊。特别是,早古生代末450~400 Ma存在全球性准同时的造山运动,已经出现俯冲增生、碰撞、陆内3种类型的全球尺度造山带。本文侧重论述全球早古生代碰撞类型造山带的特征,总结典型碰撞造山带最新的年代学、变质、变形和岩浆作用特征及其时空分布。早古生代全球碰撞型造山带主要分布在南半球的泛非造山带和北半球的加里东期造山带,分别与南方冈瓦纳大陆和北方劳俄古陆的初步集结密切相关,早古生代碰撞造山主要体现在大陆块之间的碰撞作用为特征。这些早古生代碰撞造山带具有近似的碰撞年龄,大致相同的演化过程。其中,南方大陆主体碰撞完成于540 Ma,而北方大陆主体集结完成于420 Ma,从全球构造意义上可能意味着全球一个420~400 Ma的超大陆初步形成。Since the Neoproterozoic rifting of the supercontinent Rodina,Early Paleozoic entered an active period of plate tectonics.Because plate movement speed became faster,the plate configurationsare variable and instabile,the interactions among blocks are complex and changeable.the evolution of orogenic belts are also extremely complex,resulting in that global Early Paleozoic paleo-continent reconstruction today are still ambiguous.In particular,there is a global quasi-simultaneous orogeny at the end of the Early Paleozoic（450-400Ma）,there are three types of global-scale orogenic belts,which are subduction-related acretionary,collisional and intracontinental.This paper focuses on Early Paleozoic collision-type orogenic belts in the globe.It is discussed and summarized for the new geochronological and metamorphic,deformation and magmatism and their temporal and spatial distribution of the typical collisional orogenic belts.Early Paleozoic global collision-type orogenic belts mainly include the PanAfrican orogenic belts of the southern hemisphere and the Caledonian orogenic belts of the northern hemisphere,respectively.They are closely related with preliminary assemblies of the Southern Gondwana and the Northern Laurussia.The Early Paleozoic collisional orogeny is mainly characterized by the collisions between large-scale continental blocks.These Early Paleozoic collisional orogenic belts have an approximate collision age,roughly undergoing the same evolutionary process,which the main part of the continent-continent collision for the southern continents completed in 540 Ma,and the main part of the northern continents assembled in 420 Ma.In the global tectonic significance it may means the initial formation of a global supercontinent of 420-400 Ma.

关 键 词：早古生代 碰撞造山 加里东运动 泛非运动 冈瓦纳大陆 劳俄大陆 

分 类 号：P542.2[天文地球—构造地质学]