Paleo-Tethys System and Accretionary Orogen in the Tibetan Plateau
详细信息
- 责任者：Xu Zhiqin (State Key Laboratory for Continental Tectonics and Dynamics ; Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Yang Jingsui
- 刊名：Acta Petrologica Sinica
- 出版年：2013
- 卷期：29(6)
- 关键词：造山运动 ; orogeny ; 青藏高原 ; Qinghai-Tibetan Plateau ; 特提斯构造带 ; Tethyan Tectonic Zone
- 页码：p.1847-1860
- 图表：illus., 1 table, 108 refs.
- 分类号：0300
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The Paleo-Tethys system in the Tibet Plateau formed under environment of multi-ocean basins,micro-terrains ( ribben continents) ,island arcs,subductions and collisions. Its architectures include four ophiolite or ophiolitic mélange belts representing Paleo-Tethysoceanic crustal relics ( South Kunlun-Animaqen ophiolite zone,Jinshajiang-Ailaoshan-Songma ophiolite zone,Central Qiangtang-Lancangjiang-Changning Menglian ophiolite zone and Songduo ophiolite zone ) , five volcanic magmatic island arcs ( Bulhanbuda arc,Yidun arc,Jiangda-Luchun arc,Dongdashan-Yunxian arc,Zuogong-Lincang arc-collision) ,four terrains ( Songpan-Ganze terrain,North Qiangtang-Changdu-Simao terrain and South Qiangtang-Baoshan-Sibumasu terrain) ,three HP-UHP metamorphic belts ( Derong HP belt,Longmu Tso-Shuanghu HP belt,Songduo UHP-HP belt) ,as well as five forearc accretionary wedges ( AW) or accretionary complex belts ( West Qinling AW,Bayan Har-Songpan Gangze AW,Jinshajiang AW,Shuanghu-Nierong -Jitang-Lincang AW and Songduo AW) . The subduction-accretionary orogens constructed by multi Paleo-Tethys subductions-accretional complexes,were wide spreadly recorded in the Paleo-Tethys composive orogeinic belts of the Tibet Plateau. The Paleo-Tethys subduction-accretional complexes including arc front sediment accretional wedges of strong deformation and exotic blocks composed of ophiolites,HP metamorphic rocks and island arc magmatic rocks,which indicate crustal accretion of active continental marginduring Paleo-tethysoceanic subduction processes.
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