Basement Architecture and Evolution of Neoproterozoic Tarim Rift Basin
The basement architecture and evolution is of important role in dechipering sedimentary basin dynamitics.Based on the compiled geochronological and geochemical data,it has a review on the hot debates on the basement architecture,tectonic environment and evolution of the Neoproterozoic Tarim Basin.The results show that the southern and northern Tarim terranes are assemblied during 1.9-1.8 Ga,and the Early Neoproterozoic sedimentary succession and Paleoproterozoic igneous succession are composed to form a unified metamorphic basement during 780-750 Ma,and to form a complex metamorphic basement structure with differences between northern and southern terranes by multi-stage tectonic-thermal events.The Neoproterozoic was characterized by multi-stage of advancing subduction at ca.950-900 Ma,860-840 Ma,830-800 Ma,780-760 Ma,and multi-stages of retreating subduction at ca.760-720 Ma,670-610 Ma,which resulting in a Neoproterozoic advancing-retreating subduction cycle with the switch at ca.760 Ma.The Neoproterozoic advancing subduction controlled the origin and evolution of the metamorphic basement,and the subsequent retreating subduction controlled the initiation and evolution of continental rift basin,which suggests a different basin dynamic mechanism and evolutionary process from the classical Wilson cycle.
万方数据
维普
