DOI:
 
Post-collisional Tectonic Evolution and Metallogenesis in Northern Xinjiang,China
WANG Jingbin  XU Xin
Abstract:Post-collisional period follows the major collision, which is marked by the ocean closure and the ophiolite emplacement between/among the continental blocks, and ends with the exhaustion of large-scale granitic magma. According to these indicators, the major collision period of the northern Xinjiang is from the end of Devonian to the beginning of Carboniferous, while the post-collisional stage is from Early Carboniferous (Visean Stage) to Permian time. The data demonstrate that the post-collisional stage in northern Xinjiang experienced strong mantle-crust mutual action and was characterized by episodic and oriented evolution. Two extensional-compressive episodes, the extension in Early Carboniferous and compression in Late Carboniferous, and the extension in Early Permian and compression in Late Permian, are recognized. It is suggested that the two extensional periods in the post-collisional stage may be caused by lithosphere delamination in Early Carboniferous after major impact and mantel magma underplating in Early Permian. Thus, the compression caused by collision was exhausted by episodic extensions, and gradually finished solidification of the crust during post-collisional stage. The extensional stage and the transition period from compression to extension are the most important periods for large-scale mineralization in the post-collisional regime.
keywords:post-collisional stage,tectonic evolution,orogeny,metalogenesis,northern Xinjiang
View Full Text  View/Add Comment  Download reader
You are a visitor1076617  Beijing ICP license No. 05032737-7; Beijing public network security license No.
All Rights Reserved:《Acta Geologica Sinica》(Chinese Version)
The Competent Units:China Association for Science and Technology ; The Organizer :Geological Society of China
Address: No. 26 Baiwanzhuang Street, Xicheng District, Beijing 100037, China; Zip Code :100037 The Phone :+86(10) 6831 2410, +86(10) 6899 9025 E-mail: dizhixuebao@163.com
Supported by Beijing Qinyun Science and Technology Development Co., Ltd 
WeChat