Detrital apatite fission track constraints on Cenozoic tectonic evolution of the northeastern Qinghai-Tibet Plateau,China: Evidence from Cenozoic strata in Lulehe section,Northern Qaidam Basin |
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| Authors: | " target="_blank">Ding-ding Du Cheng-jun Zhang " target="_blank">Muhammad Saleem Mughal " target="_blank">Xiao-yu Wang " target="_blank">Dembele Blaise " target="_blank">Jun-ping Gao " target="_blank">Yuan Ma " target="_blank">Xin-rong Luo |
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| Institution: | 1.School of Earth Sciences and Mineral Resources,Lanzhou University,Lanzhou,China;2.Key Laboratory of Western China’s Mineral Resources of Gansu Province,Lanzhou,China;3.Institute of Geology,University of Azad Jammu and Kashmir,Muzaffarabad,Pakistan |
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| Abstract: | The Northern Qaidam Basin is located at the northeastern part of the Qinghai-Tibetan Plateau. It contains very thick Cenozoic terrestrial clastic sediments, which records the formation of the northern Qaidam Basin due to compressional deformation during the Indo-Asian collision. In this paper, we used detrital apatite fission-track thermochronology, including 4 sandstones and 2 conglomerates samples from the Lulehe section, to reveal the Cenozoic evolution of the northern Qaidam Basin. Fission-track dating indicated the source region of the Lulehe section has experienced important cooling and uplifting in the Late Cretaceous (at ~85.1 Ma and ~65 Ma) and the Eocene (~52 Ma), respectively. The AFT age distribution on the section suggested that the provenance of Lulehe section sediments were mainly derived from the south Qilian Shan (Qilian Mountains) and Altun Shan (Altun Mountains), and two significantly provenance changes may occur at 43.4-46.1 Ma and ~37.8 Ma, respectively. The results may have strong constrains on the Cenozoic deformation and tectonic evolution of the northern Qaidam Basin and Qinghai-Tibet Plateau. |
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