The Weihe Basin, Weibei uplift and the eastern Qinling orogen are located at the junction of the northeastern margin of the Tibetan Plateau, the North China Craton and the Yangtze Craton. They constitute the unique basin-range system with oil and gas, helium and geothermal resources. The Cenozoic is a key period related with the sedimentary-tectonic evolution of the Weihe Basin, the uplift of the Weibei uplift and the eastern Qinling orogen. However, the coupling relation of these processes remains poorly constrained, which hinder the understanding of distribution of regional mineral resources. The basin-range coupling is reflected in time, space, material, tectonism and earth surface morphology. We analyzed the range and rate of the tectonic subsidence based on a large number of borehole data via the “backstripping”, and restored the basin sedimentary evolution history according to the distribution of sedimentary thickness at the different stages during main settlement period. The results showed that the Cenozoic sedimentary-tectonic evolution of the Weihe Basin is characterized by migration from southwestern Xi’an depression to northeastern Gushi depression. There was a rapidly subsidence in the Weihe Basin during the Paleocene-Eocene, and then the Xi’an depression became the main depocenter and subsidence center at the Early-Middle Miocene. At the Late Miocene, both of the Xi’an and Gushi depressions became the main depocenter and subsidence center. During Late Pliocene to Early Pleistocene, the subsidence center migrated to the northeastern Gushi depression. Late Pleistocene, both of the Xi’an depression and Gushi depressions were in a rapid subsidence. The results of fission track dating indicated that the Weibei uplift experienced a rapid uplift during the period from ca. 45 Ma to ca. 32 Ma, which was synchronous with a ca. 57～40 Ma rapid uplift in the Taibai and Huashan Mountains. These uplifts are coupled with the ca. 40 Ma rapid subsidence of the Weihe Basin. The sustained rapid subsidence of the Weihe Basin from ca. 7.3 Ma in the Late Miocene was basically consistent with the rapid uplifts of the Weibei uplift at ca. 5 Ma, the Taibai Mountain at ca. 10～9.6 Ma and the Huashan Mountain at ca. 8～5 Ma. The basin-range coupling reported in this paper is possible influenced by the complicated geodynamic processes of the subduction of the Pacific plate, the ca. 55～45 Ma collision between the India and Eurasia plates and the long-range effect of the ca. 10～8 Ma uplift and extension of the Tibetan Plateau.
Yang Peng Ren Zhanli Zhang Jingong Xia Bin Tian Tao Cai Zhourong Zhang Yong. Discussion of the coupling relationships between the Cenozoic sedimentary-tectonic migration of the Weihe Basin and the uplift of the Weibei and East Qinling areas[J]. Chinese Journal of Geology, 2018, 53(3): 876-892.