During the Paleozoic, the Northern Tianshan region of China in Central Asia consists of 7 allochthonous terranes which were situated in the ancient Sino\|Mongolian Ocean as volcanic arcs and splitted continental fragm...During the Paleozoic, the Northern Tianshan region of China in Central Asia consists of 7 allochthonous terranes which were situated in the ancient Sino\|Mongolian Ocean as volcanic arcs and splitted continental fragments. The tectonic framework was similar to that of Southwest Pacific today. In the Late Paleozoic, these terranes started mutual amalgamation to cause strong thrusting. At the end of Carboniferous, the Sino\|Mongolian ocean including several inter\|terrane small sea basins closed and these terranes accreted on the margins of the Siberian and Tarim continents. The 6 ophiolitic zones among the terranes recorded this collision event.展开更多
This paper summarizes the lalest advances in research on the terrane tectonics of China. The terranes of China distributed around various plates may be divided into four terrane belts of different ages and sizes, i. e...This paper summarizes the lalest advances in research on the terrane tectonics of China. The terranes of China distributed around various plates may be divided into four terrane belts of different ages and sizes, i. e., the East China, Northwest China, Southwest China and Qinling-Dabie terrane belts. Among them, the East China belt may be subdivided into three composite terrane groups; each terrane group is composed of several terranes that were formed roughly at the same time and have distinct geologic histories. The accretion of China’s terranes involves three types: the collision type, the flake-thrusting type, and the docking type. The results of the latest study in the five widening fields and some advances in the metheds of research on the terrane tectonics in China are presented in the present paper.展开更多
As the members of Chinese Group of the international cooperative project of “Mineral Resources, Metallogenesis, and Tectonics of Northeast Asia”, the authors had the opportunity to review the recent achievement of r...As the members of Chinese Group of the international cooperative project of “Mineral Resources, Metallogenesis, and Tectonics of Northeast Asia”, the authors had the opportunity to review the recent achievement of regional geology in this area. This paper is confined to a brief discussion of the nature, composition and evolution of terranes in a part of Northeast China. Nine terranes were recognized. A splicing pattern of when and how the amalgamation of 9 terranes into one microcontient is proposed here.展开更多
There are eight Hercynian orogenic fold belts in northern Xinjiang. The traditional viewpoint is that the orogeny was related to collision between the Siberian plate, Kazakhstan-Junggar and Tarim-Sinokorean plates. Th...There are eight Hercynian orogenic fold belts in northern Xinjiang. The traditional viewpoint is that the orogeny was related to collision between the Siberian plate, Kazakhstan-Junggar and Tarim-Sinokorean plates. The recent investigation indicates that in northern Xinjiang, geological entity of continental plate did not exist during the Hercynian cycle. It is suggested that the orogenic processes in this area are the results of displacement and accretion between the Tarim terrane, Junggar terrane, central Tianshan (Ili-Isaik Lake)展开更多
Intraplate structural deformation is diagnostic of tectonic stress regime changes linked to plate interactions and can result from superposed tectonic events whose single contributions are hardly distinguishable.In th...Intraplate structural deformation is diagnostic of tectonic stress regime changes linked to plate interactions and can result from superposed tectonic events whose single contributions are hardly distinguishable.In this paper,we present a set of integrated thermochronologic inverse models along a 140 km-long transect across the central Greater Caucasus and the adjacent Adjara-Trialeti fold-and-thrust belt of Georgia,two intraplate orogens produced by structural inversion of parallel continental rift zones located on the Eurasian plate.Our dataset allows to distinguish discrete and superposed deformation episodes and quantify their respective contributions to orogenic exhumation.The integration of(U-Th)/He analysis on apatite and zircon,fission-track analysis on apatite,and peak-temperature determinations(clay mineralogy,organic matter petrography,Raman spectroscopy)shows that structural inversion was punctuated by two incremental steps starting respectively in the latest Cretaceous and the mid-Miocene.Latest Cretaceous partial inversion of the Greater Caucasus is documented here for the first time and placed in a geographically wider context of coeval deformation.The two episodes of intraplate structural inversion,exhumation,and sediment generation are chronologically and physically correlated with docking of(i)the Anatolide-Tauride-Armenian terrane(Late Cretaceous-Paleocene)and(ii)Arabia(Miocene hard collision)against the southern Eurasian plate margin.Intraplate deformation in the Caucasian domain was triggered by far-field propagation of plate-margin collisional stress which focused preferentially along rheologically weak rift zones.展开更多
文摘During the Paleozoic, the Northern Tianshan region of China in Central Asia consists of 7 allochthonous terranes which were situated in the ancient Sino\|Mongolian Ocean as volcanic arcs and splitted continental fragments. The tectonic framework was similar to that of Southwest Pacific today. In the Late Paleozoic, these terranes started mutual amalgamation to cause strong thrusting. At the end of Carboniferous, the Sino\|Mongolian ocean including several inter\|terrane small sea basins closed and these terranes accreted on the margins of the Siberian and Tarim continents. The 6 ophiolitic zones among the terranes recorded this collision event.
文摘This paper summarizes the lalest advances in research on the terrane tectonics of China. The terranes of China distributed around various plates may be divided into four terrane belts of different ages and sizes, i. e., the East China, Northwest China, Southwest China and Qinling-Dabie terrane belts. Among them, the East China belt may be subdivided into three composite terrane groups; each terrane group is composed of several terranes that were formed roughly at the same time and have distinct geologic histories. The accretion of China’s terranes involves three types: the collision type, the flake-thrusting type, and the docking type. The results of the latest study in the five widening fields and some advances in the metheds of research on the terrane tectonics in China are presented in the present paper.
文摘As the members of Chinese Group of the international cooperative project of “Mineral Resources, Metallogenesis, and Tectonics of Northeast Asia”, the authors had the opportunity to review the recent achievement of regional geology in this area. This paper is confined to a brief discussion of the nature, composition and evolution of terranes in a part of Northeast China. Nine terranes were recognized. A splicing pattern of when and how the amalgamation of 9 terranes into one microcontient is proposed here.
基金Project supported by a fund from the National Project 305.
文摘There are eight Hercynian orogenic fold belts in northern Xinjiang. The traditional viewpoint is that the orogeny was related to collision between the Siberian plate, Kazakhstan-Junggar and Tarim-Sinokorean plates. The recent investigation indicates that in northern Xinjiang, geological entity of continental plate did not exist during the Hercynian cycle. It is suggested that the orogenic processes in this area are the results of displacement and accretion between the Tarim terrane, Junggar terrane, central Tianshan (Ili-Isaik Lake)
文摘Intraplate structural deformation is diagnostic of tectonic stress regime changes linked to plate interactions and can result from superposed tectonic events whose single contributions are hardly distinguishable.In this paper,we present a set of integrated thermochronologic inverse models along a 140 km-long transect across the central Greater Caucasus and the adjacent Adjara-Trialeti fold-and-thrust belt of Georgia,two intraplate orogens produced by structural inversion of parallel continental rift zones located on the Eurasian plate.Our dataset allows to distinguish discrete and superposed deformation episodes and quantify their respective contributions to orogenic exhumation.The integration of(U-Th)/He analysis on apatite and zircon,fission-track analysis on apatite,and peak-temperature determinations(clay mineralogy,organic matter petrography,Raman spectroscopy)shows that structural inversion was punctuated by two incremental steps starting respectively in the latest Cretaceous and the mid-Miocene.Latest Cretaceous partial inversion of the Greater Caucasus is documented here for the first time and placed in a geographically wider context of coeval deformation.The two episodes of intraplate structural inversion,exhumation,and sediment generation are chronologically and physically correlated with docking of(i)the Anatolide-Tauride-Armenian terrane(Late Cretaceous-Paleocene)and(ii)Arabia(Miocene hard collision)against the southern Eurasian plate margin.Intraplate deformation in the Caucasian domain was triggered by far-field propagation of plate-margin collisional stress which focused preferentially along rheologically weak rift zones.
