兰州大学机构库 >地质科学与矿产资源学院
Mesozoic-Cenozoic Uplift/Exhumation History of the Qilian Shan, NE Tibetan Plateau: Constraints From Low-Temperature Thermochronology
Chen, Lihao1,2; Song, CH(宋春晖)1,2; Wang, Yadong3,4,5; Fang, Xiaomin3,4,6; Zhang, Yihu1,2; Zhang, Jing1,2; Chen, Yongfa1,2; He, PJ(何鹏举)1,2
2021-12-13
Source PublicationFRONTIERS IN EARTH SCIENCE
Volume9
AbstractThe Qilian Shan, which is located along the northeastern margin of the Tibetan Plateau, plays a key role in understanding the dynamics of the outward and upward growth of the plateau. However, when and how tectonic deformation evolved into the geographic pattern which is currently observed in the Qilian Shan are still ambiguous. Here, apatite fission track (AFT) thermochronology and sedimentology were conducted to interpret the low-temperature tectonic deformation/exhumation events in well-dated Late Miocene synorogenic sediment sequences in the Xining Basin, which is adjacent to the southern flank of the Qilian Shan. These new low-temperature thermochronological results suggest that the Qilian Shan experienced four stages of tectonic exhumation during the late Mesozoic-Cenozoic. The Late Cretaceous exhumation events in the Qilian Shan were caused by the diachronous Mesozoic convergence of the Asian Plate and Lhasa Block. In the early Cenozoic (ca. 68-48 Ma), the Qilian Shan quasi-synchronously responded to the Indian-Asian plate collision. Subsequently, the mountain range experienced a two-phase deformation during the Eocene-Early Miocene due to the distal effects of ongoing India-Asia plate convergence. At ca. 8 +/- 1 Ma, the Qilian Shan underwent dramatic geomorphological deformation, which marked a change in subsidence along the northeastern margin of the Tibetan Plateau at that time. Our findings suggest that the paleogeographic pattern in the northeastern Tibetan Plateau was affected by the pervasive suture zones in the entire Qilian Shan, in which the pre-Cenozoic and Indian-Asian plate motions reactivated the transpressional faults which strongly modulated the multiperiodic tectonic deformation in northern Tibet during the Cenozoic. These observations provide new evidence for understanding the dynamic mechanisms of the uplift and expansion of the Tibetan Plateau.
KeywordApatite fission track Northern Tibetan Plateau Xining Basin Qilian Shan Tectonic exhumation Geomorphological NE Tibetan Plateau
PublisherFRONTIERS MEDIA SA
DOI10.3389/feart.2021.760100
Indexed BySCIE
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000737944100001
Original Document TypeArticle
Citation statistics
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/480488
Collection地质科学与矿产资源学院
Affiliation1.Lanzhou Univ, Sch Earth Sci, Lanzhou, Peoples R China;
2.Lanzhou Univ, Key Lab Mineral Resources Western China Gansu Pro, Lanzhou, Peoples R China;
3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou, Gansu, Peoples R China;
4.Key Lab Petr Resources, Lanzhou, Gansu, Peoples R China;
5.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Rock Mineral Preparat & Fiss Track Dating Lab Geo, Lanzhou, Peoples R China;
6.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing, Peoples R China
First Author AffilicationSchool of Earth Sciences
Recommended Citation
GB/T 7714
Chen, Lihao,Song, Chunhui,Wang, Yadong,et al. Mesozoic-Cenozoic Uplift/Exhumation History of the Qilian Shan, NE Tibetan Plateau: Constraints From Low-Temperature Thermochronology[J]. FRONTIERS IN EARTH SCIENCE,2021,9.
APA Chen, Lihao.,Song, Chunhui.,Wang, Yadong.,Fang, Xiaomin.,Zhang, Yihu.,...&He, Pengju.(2021).Mesozoic-Cenozoic Uplift/Exhumation History of the Qilian Shan, NE Tibetan Plateau: Constraints From Low-Temperature Thermochronology.FRONTIERS IN EARTH SCIENCE,9.
MLA Chen, Lihao,et al."Mesozoic-Cenozoic Uplift/Exhumation History of the Qilian Shan, NE Tibetan Plateau: Constraints From Low-Temperature Thermochronology".FRONTIERS IN EARTH SCIENCE 9(2021).
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