Arc magmatism as a window to plate kinematics and subduction polarity:Example from the eastern Pontides belt,NE Turkey

作     者：Yener Eyuboglu M.Santosh Osman Bektas Seda Ayhan 

作者机构：Department of Geological EngineeringGumushane University29000 GumushaneTurkey Faculty of ScienceKochi UniversityKochi 780-8520Japan Department of Geological EngineeringKaradeniz Technical University61030 TrabzonTurkey 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2011年第2卷第1期

页      面：49-56页

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

基　　金：The Scientific and Technological Research Council of Turkey(TUBITAK-Grant 108Y309) 

主　　题：Turkey Eastern Pontides belt Subduction polarity Arc magmatism Paleomagnetism 

摘      要：The Eastern Pontides orogenic belt in the Black Sea region of Turkey offers a critical window to plate kinematics and subduction polarity during the closure of the Paleotethys. Here we provide a brief synthesis on recent information from this belt. We infer a southward subduction for the origin of the Eastern Pontides orogenic belt and its associated late Mesozoic--Cenozoic magmatism based on clear spatial and temporal variations in Late Cretaceous and Cenozoic arc magmatism, together with the exis- tence of a prominent south-dipping reverse fault system along the entire southern coast of the Black Sea. Our model is at variance with some recent proposals favoring a northward subduction polarity, and illus- trates the importance of arc magmatism in evaluating the geodynamic milieu associated with convergent margin orocesses.