DOI: 10.1016/j.quascirev.2017.10.017
Scopus记录号: 2-s2.0-85035076548
论文题名: Latest Quaternary rapid river incision across an inactive fold in the northern Chinese Tian Shan foreland
作者: Lu H. ; Cheng L. ; Wang Z. ; Zhang T. ; Lü Y. ; Zhao J. ; Li Y. ; Zheng X.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 179 起始页码: 167
结束页码: 181
语种: 英语
英文关键词: Fluvial terrace
; Late Quaternary
; Palaeoclimate
; River incision
; Tian Shan
Scopus关键词: Luminescence
; Stabilization
; Stream flow
; Vegetation
; Field investigation
; Fluvial terraces
; Late quaternary
; Longitudinal profile
; Optically stimulated luminescence
; Palaeoclimate
; Surface exposure dating
; Tian Shan
; Rivers
; alluvial plain
; anticline
; bedrock
; climate conditions
; fold
; foreland basin
; incised valley
; luminescence dating
; paleoclimate
; Quaternary
; river terrace
; stabilization
; Tien Shan
英文摘要: This work focuses on the incision process over the Tuostai anticline, a fold of the proximal structure Belt I in the northern Chinese Tian Shan foreland, where the Sikeshu River has incised deeply into the alluvial gravels and the fold's underlying bedrock strata. Field investigation and geomorphic mapping define five terraces of the Sikeshu River (designated as T1 to T5 from oldest to youngest) preserved within the Tuostai anticline. 10Be surface exposure dating and optically stimulated luminescence dating constrain stabilization of the highest three terrace surfaces at about 80 ka (T1), 16 ka (T2), and 15 ka (T3), respectively. Around 16 ka, the calculated river incision rates significantly increase from <2 mm/yr to >6 mm/yr. Undeformed longitudinal profiles of terraces T2, T3 and T4 over the Tuostai anticline suggest that this structure may have been tectonically inactive since stabilization of these three terraces. We thus think that the observed rapid river incision over the Tuostai anticline has not been largely forced by tectonic uplift. Instead, the progressively warmer and wetter palaeoclimatic condition within the Tian Shan range and its surrounding area during the period of ∼20–10 ka may have enhanced river incision across the Tuostai anticline. A reduced sediment/water ratio might have lowered the gradient of the Sikeshu River. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112349
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Geographic Information Science of Ministry of Education, East China Normal University, Shanghai, 200241, China; School of Geographic Sciences, East China Normal University, Shanghai, 200241, China; The Institute of Earth and Environmental Science, University of Potsdam, Potsdam, 14476, Germany; Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake Administration, Beijing, 100085, China; Key Laboratory of Earth Surface Processes of Ministry of Education, Peking University, Beijing, 100871, China
Recommended Citation:
Lu H.,Cheng L.,Wang Z.,et al. Latest Quaternary rapid river incision across an inactive fold in the northern Chinese Tian Shan foreland[J]. Quaternary Science Reviews,2018-01-01,179