Tectonic Uplift And Cenozoic Sedimentary Evolution In The Northern Margin Of The Tibetan Plateau

The Tibetan plateau, the youngest and most spectacular continent-continent collision belt, has long been known as the natural laboratory to study the continental dynamics and global change. Thus the study of its formation, tectonic uplift process and environmental effect are present-day important subject in international geological research. Recent decades, the study on the Tibetan Plateau has made great progresses, which not only contribute to deciphering of the mechanism of global tectonics and global change but also induce the occurrence of some significant hypotheses. However, the debates on these issues still exist, and the key problem is the lack of the constraints on the age and the process of its uplift.Even scholars have done a lot of work in variety of aspects, they can not approached to aconsensus with regard to the age, formation and tectonic uplift process of the Tibetan Plateau. Thiswould be resulted from the discrepancy in the methods used and the evidences obtained. Forinstance, the data from the individual magma intrusion exposed in an area or a fault extendinglocally and activated periodically can not used to interpret the sequence of uplift process of wholeTibetan Plateau. The basins and mountains in the adjacent region and interior of the TibetanPlateau were formed in the process of deformation and uplift of the Tibetan Plateau. Thesediments filled in the basins were the result of rock weathering, denudation, transportation anddeposition within drainage area. These sediments continuously recorded information of thetectonic evolution of orogenic belts, the climatic and environmental changes in the process ofbasin formation. Thus, according to the mountain - basin coupling hypothesis, the probableapproachable way to reconstruct the uplift history of the Tibetan Plateau should base on the highresolution analysis of sedimentary, tectonic evolution and environmental information of the basinin the interior and adjacent Tibetan Plateau. In recent years, the great progress has been made inreconstruction of the tectonic uplift events of the Tibetan Plateau by revealing the informationrecorded in the basin. However, the previous studies are often limited in discussion of relationshipof single basin and its adjacent mountain, or lack of accurate chronological data. Could thesetectonic events captured from a single basin be revealed the sequence of tectonic uplift through thewhole Tibetan Plateau? Dose there exist still important tectonic events that had been notdiscovered? Is the Tibetan Plateau obliquely stepwise rise and growth from south to north andfrom east to west? Therefore, it demand urgently that set the age sequence of the tectonic upliftevents and its deformation process in detail from the various parts of the Tibetan Plateau, to...