The Late Cenozoic rock magnetic characteristics of the Honggouzi section in the western Qaidam Basin and its response to the uplift of the NE Tibetan Plateau
Zhang Tao1 Hu Sihu1 Liu Dongliang2 Gao Junping1 Meng Qingquan1 Fang Xiaomin2
1.Key Laboratory of Western China's Environmental Systems, Ministry of Education of China, and College of Resources and Environment, Lanzhou University, Lanzhou 730000|2. Center of Basin Resources and Environment, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085
The Qaidam Basin is an inland basin in the northeastern Tibetan PlateauIt has developed thick MesozoicCenozoic sedimentary strataThese strata recorded the evolution of the structure and environment of the basin and its surrounding mountainsBased on Late Cenozoic sedimentary rock magnetic study of the Honggouzi section in the northwest Qaidam Basin，we found that the value of magnetic susceptibility increased dramatically in the～9.8 Ma，together with significant increase the amount of magnetiteCombined with sedimentary facies，lithology and sedimentation rate，and based on the relationship between the magnetic properties of sediments and environmental change，and the tectonic activities，we believe that the dramatic changes of rock magnetic characteristics may have been caused by the changes of sedimentary provenances in～9.8 MaIt may imply a significant uplift event of the northeastern margin of Tibet PlateauAltyn Tagh was one of sources of the Qaidam Basin，which responded to this tectonic movementThe mountin reached certain height so that the erosion rate increased，this process was recorded by Honggouzi.
. The Late Cenozoic rock magnetic characteristics of the Honggouzi section in the western Qaidam Basin and its response to the uplift of the NE Tibetan Plateau[J]. Chinese Journal of Geology, 2010, 45(04): 987-996.