绍-江古陆对接带深成杂岩厘定及其成因环境判别

The plutonic complex rock definition and genetic environment judgement of the Shaoxing-Jiangshan pangea Oppsite zone

绍-江对接带位处华夏-扬子古陆对接碰撞带北东敛合端,其间保留有俯冲混杂堆积岩,是仅存可见的元古碰撞造山带的根部,是判析古大洋壳岩石学演进及俯冲消减动力学过程的天然实验室,自然也是当前中国南方古板块构造格局厘定及元古造山带研究的核心问题。本文重点阐述绍江对接碰撞带系列岩石学组成及其地球化学特征,探索成因环境、论证元古南华洋的存在,追溯其消减造山的历史过程。

Shaoxing-Jiangshan split collision belt located in the northeast of Huaxia-Yangtze Oppsite collision belt,and it＇s the only remaining part that the buttom of Proterozoic collision and Orogenic zone can be found,subduction melange rocks and due to continental collision、deep shear leading to complex deformation and thermodynamic melting phenomenon,it＇s the excellent laboratory of judging the evolution of ancient oceanic crust and subduction dynamics,of course,confirmation ancient plate structural pattern of South China and Proterozoic orogenic zone is the central issue.This paper focuses on expounding a series of rock composition of Shao-Jiang split collision belt and its geochemical characteristics,to explore and demonstrate the existence of South China Proterozoic Ocean,and its constitution model,then traces the history of its reduction orogenic process.