Evolution of Neoproterozoic-Mesozoic Sedimentary Basins in Qilian-Qaidam-East Kunlun Area
Jiang Gaolei
Zhang Simin
Liu Kunfeng
Zhang Kexin
Abstract：Qilian-Qaidam-East Kunlun area,located at the mid-western of the Central Orogenic Belt,has a complicated tectonic history.The tectonic-sedimentary evolution is discussed based on its sedimentary characteristics in this paper.During Neoprot-erozoic to Early Paleozoic,North Qilian Ocean,Saishiteng-Xitieshan Ocean,and East Kunlun Ocean opened,the study area developed continental-margin rift and ocean basin deposition.At the end of Early Paleozoic,foreland basin,continental-margin graben developed following the successive closing of the three oceans.From Cambrian to Early Triassic,A??nyemaqen Ocean completed an opening-closing cycle,and the study area began the phase of inland fault basin,downwarped basin deposits.The opening-closing cycles of ocean and intracontinent orogen are recorded in deposits of the study area,which provides sedimentary evidence for the above tectonic event.
Keywords：Qilian-Qaidam-East KunlunNeoproterozoic-Mesozoicsedimentologytectonicsbasin evolution
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：17( 1000-1016 )