Paleozoic tectonic evolution of the eastern Central Asian Orogenic Belt in NE China  

作　　者：Yong-fei Ma Yong-jiang Liu AYuPeskov Yan Wang Wei-min Song Yu-jin Zhang Cheng Qian Tong-jun Liu 

机构地区：[1]Shenyang Center of China Geological Survey,Shenyang 110034,China [2]Frontiers Science Center for Deep Ocean Multispheres and Earth System,Key Lab of Submarine Geoscience and Prospecting Techniques,College of Marine Geosciences,Ocean University of China,Qingdao 266100,China [3]Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China [4]Kosygin Institute of Tectonics and Geophysics,Far East Branch,Russian Academy of Sciences,Khabarovsk 680000,Russia [5]College of Earth Sciences,Jilin University,Changchun 130061,China [6]College of Earth Sciences,Institute of Disaster Prevention,Sanhe 065201,China

出　　处：《China Geology》2022年第4期555-578,共24页中国地质（英文）

基　　金：financially supported by the National Natural Science Foundation of China(42130305 and 42002227);project of the China Geological Survey(DD20190039-04,DD20179402,DD20190360 and DD20221632);National Key R&D Program of China(2017YFC0601300 and 2013CB429802);Taishan Scholars(ts20190918);Qingdao Leading Innovation Talents(19-3-2-19-zhc).

摘　　要：The eastern Central Asian Orogenic Belt(CAOB)in NE China is a key area for investigating continental growth.However,the complexity of its Paleozoic geological history has meant that the tectonic development of this belt is not fully understood.NE China is composed of the Erguna and Jiamusi blocks in the northern and eastern parts and the Xing’an and Songliao-Xilinhot accretionary terranes in the central and southern parts.The Erguna and Jiamusi blocks have Precambrian basements with Siberia and Gondwana affinities,respectively.In contrast,the Xing’an and Songliao-Xilinhot accretionary terranes were formed via subduction and collision processes.These blocks and terranes were separated by the Xinlin-Xiguitu,Heilongjiang,Nenjiang,and Solonker oceans from north to south,and these oceans closed during the Cambrian(ca.500 Ma),Late Silurian(ca.420 Ma),early Late Carboniferous(ca.320 Ma),and Late Permian to Middle Triassic(260-240 Ma),respectively,forming the Xinlin-Xiguitu,Mudanjiang-Yilan,Hegenshan-Heihe,Solonker-Linxi,and Changchun-Yanji suture zones.Two oceanic tectonic cycles took place in the eastern Paleo-Asian Ocean(PAO),namely,the Early Paleozoic cycle involving the Xinlin-Xiguitu and Heilongjiang oceans and the late Paleozoic cycle involving the Nenjiang-Solonker oceans.The Paleozoic tectonic pattern of the eastern CAOB generally shows structural features that trend east-west.The timing of accretion and collision events of the eastern CAOB during the Paleozoic youngs progressively from north to south.The branch ocean basins of the eastern PAO closed from west to east in a scissor-like manner.A bi-directional subduction regime dominated during the narrowing and closure process of the eastern PAO,which led to“soft collision”of tectonic units on each side,forming huge accretionary orogenic belts in central Asia.

关 键 词：Eastern Central Asian Orogenic Belt Paleo-Asian Ocean Continental growth Soft collision Accretionary orogenic belt PALEOZOIC Tectonic evolution Geological survey engineering NE China Siberia 

分 类 号：P542.2[天文地球—构造地质学] P534.4[天文地球—地质学]