Tracing the closure of oceans with irregular margins and the formation of an orocline are crucial for understanding plate reconstruction and continental assembly.The eastern Central Asian Orogenic Belt,where the Mongol-Okhotsk orocline is situated,is one of the world's largest magmatic provinces.Using a large data set of U-Pb zircon ages,we updated the timing of many published igneous rocks,which allowed us to recognize tightly'folded'linear Carboniferous-Jurassic magmatic belts that wrap around the Mongol-Okhotsk suture and their migrations both sutureward and suture-parallel.The new successive magmatic belts reveal a rollback,scissor-like(or zipper-like)closure of the Mongol-Okhotsk Ocean that was fundamentally controlled by coeval subduction rollback and rotation of the Siberian and Mongolian-Erguna blocks.This study also demonstrates the complex mechanisms and processes of the closure of an ocean with irregular margins and the formation of a consequent orocline.

Tao Wang;Ying Tong;Wenjiao Xiao;Lei Guo;Brian F.Windley;Tatiana Donskaya;Shan Li;Narantsetseg Tserendash;Jianjun Zhang

Beijing SHRIMP Center,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China;Key Laboratory of Earth Probe and Geodynamics,Chinese Academy of Geological Sciences,Beijing 100037,China;Xinjiang Research Center for Mineral Resources,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China;School of Geography,Geology and the Environment,University of Leicester,Leicester LE1 7RH,UK;Institute of the Earth's Crust,Siberian Branch,Russian Academy of Sciences,Irkutsk 664033,Russia;Institute of Geology,Mongolian Academy of Sciences,Ulaanbaatar 15160,Mongolia

国家科学评论（英文版）

[1]Tao Wang;Ying Tong;Wenjiao Xiao;Lei Guo;Brian F.Windley;Tatiana Donskaya;Shan Li;Narantsetseg Tserendash;Jianjun Zhang-.Rollback,scissor-like closure of the Mongol-Okhotsk Ocean and formation of an orocline:magmatic migration based on a large archive of age data)[J].国家科学评论（英文版）,2022(05):162-173

Rollback,orocline,sutureward,Erguna

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