Early Paleozoic tectonics of Asia:Towards a full-plate model  

作　　者：Mathew Domeier 

机构地区：[1]Centre for Earth Evolution and Dynamics,University of Oslo

出　　处：《Geoscience Frontiers》2018年第3期789-862,共74页地学前缘（英文版）

基　　金：supported by the Research Council of Norway(RCN)through its Centres of Excellence funding scheme, project 223272 (CEED), and through RCN project 250111

摘　　要：Asia is key to a richer understanding of many important lithospheric processes such as crustal growth,continental evolution and orogenesis. But to properly decipher the secrets Asia holds, a first-order tectonic context is needed. This presents a challenge, however, because a great variety of alternative and often contradictory tectonic models of Asia have flourished. This plethora of models has in part arisen from efforts to explain limited observations(in space, time or discipline) without regard for the broader assemblage of established constraints. The way forward, then, is to endeavor to construct paleogeographic models that fully incorporate the diverse constraints available, namely from quantitative paleomagnetic data, the plentiful record of geologic and paleobiologic observations, and the principles of plate tectonics. This paper presents a preliminary attempt at such a synthesis concerning the early Paleozoic tectonic history of Asia. A review of salient geologic observations and paleomagnetic data from the various continental blocks and terranes of Asia is followed by the presentation of a new, full-plate tectonic model of the region from middle Cambrian to end-Silurian time(500-420 Ma). Although this work may serve as a reference point, the model itself can only be considred provisional and ideally it will evolve with time. Accordingly, all the model details are released so that they may be used to test and improve the framework as new discoveries unfold.Asia is key to a richer understanding of many important lithospheric processes such as crustal growth,continental evolution and orogenesis. But to properly decipher the secrets Asia holds, a first-order tectonic context is needed. This presents a challenge, however, because a great variety of alternative and often contradictory tectonic models of Asia have flourished. This plethora of models has in part arisen from efforts to explain limited observations(in space, time or discipline) without regard for the broader assemblage of established constraints. The way forward, then, is to endeavor to construct paleogeographic models that fully incorporate the diverse constraints available, namely from quantitative paleomagnetic data, the plentiful record of geologic and paleobiologic observations, and the principles of plate tectonics. This paper presents a preliminary attempt at such a synthesis concerning the early Paleozoic tectonic history of Asia. A review of salient geologic observations and paleomagnetic data from the various continental blocks and terranes of Asia is followed by the presentation of a new, full-plate tectonic model of the region from middle Cambrian to end-Silurian time(500-420 Ma). Although this work may serve as a reference point, the model itself can only be considred provisional and ideally it will evolve with time. Accordingly, all the model details are released so that they may be used to test and improve the framework as new discoveries unfold.

关 键 词：TECTONICS ASIA EARLY PALEOZOIC PALEOGEOGRAPHY PALEOMAGNETISM 

分 类 号：P[天文地球]