DOI: 10.1016/j.epsl.2018.07.004
Scopus记录号: 2-s2.0-85050591280
论文题名: Late Cretaceous–Palaeogene topography of the Chinese Tian Shan: New insights from geomorphology and sedimentology
作者: Jolivet M. ; Barrier L. ; Dauteuil O. ; Laborde A. ; Li Q. ; Reichenbacher B. ; Popescu S.-M. ; Sha J. ; Guo Z.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 499 起始页码: 95
结束页码: 106
语种: 英语
英文关键词: Central Asia
; geomorphology
; Tian Shan
; topographic heritage
Scopus关键词: Catchments
; Climate change
; Deformation
; Geomorphology
; Landforms
; Sedimentology
; Stratigraphy
; Biostratigraphic analysis
; Central Asia
; Field observations
; Lithospheric structure
; Semi-arid conditions
; Tectonic reactivation
; Tian Shan
; topographic heritage
; Topography
; arid environment
; Cretaceous-Paleogene boundary
; erosion
; geomorphology
; incised valley
; sedimentology
; topographic mapping
; Tien Shan
英文摘要: The Cenozoic growth of the intra-continental Tian Shan Range initiated during the late Eocene–Oligocene, and led to a tectonic reactivation of the complex Palaeozoic and Mesozoic lithospheric structure. Due to the very low erosion rates linked to the semi-arid climate that characterised the Tian Shan region during most of the Cenozoic, the topography of the range is not at equilibrium with deformation. Fragments of pre-orogenic low relief surfaces are preserved among the Late Cenozoic Alpine-type topography. Using field observations and satellite image mapping of those fragments, as well as sedimentology and biostratigraphic analysis, we show that the pre-Oligocene topography of the Tian Shan region was indeed complex, combining hundreds of metres to one-and-a-half kilometre-high reliefs with a multi-phased Mesozoic planation surface incised by Late Mesozoic paleo-valleys. The occurrence of several metres-thick Late Cretaceous–Palaeogene calcareous paleosols, in the basins surrounding the range further implies a semi-arid climate, very low subsidence rates and no uplift at that time. Late Cretaceous and early Miocene fossil records in the northern Tian Shan suggest a possible connection, even if episodic, between the drainage system of the south Junggar foreland basin and the proto-Paratethys Sea to the west. A renewed late Eocene–early Oligocene sedimentation probably marks the onset of the Tian Shan uplift. We argue that in addition to the growth of the Pamir and Western Kunlun ranges, this incipient uplift was one of the driving mechanisms for the final retreat of the proto-Paratethys Sea from the Tarim Basin. This regression apparently did not change the climate in the studied area because semi-arid conditions seem to prevail at least since the Late Cretaceous. Finally, the Tian Shan uplift remained very limited up to the Miocene as revealed by the occurrence of Burdigalian lake deposits preserved in the paleo-valleys inside the present day range. In contrast, post-early Miocene deformation of the northern Tian Shan has produced 4000 to 5000 m of differential vertical movement between the uplifted range and the subsiding proximal foreland basin. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109723
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Univ Rennes, CNRS, Géosciences Rennes, UMR 6118, CNRS, Rennes, F-35000, France; Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS, Paris, France; Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing, 100871, China; Department für Geo- und Umweltwissenschaften, Paläontologie & Geobiologie, Ludwig-Maximilians-Universität München, Richard-Wagner-Str. 10, München, 80333, Germany; Geobiostratadata Consulting, 385 Route du Mas Rillier, Rillieux la Pape, 69140, France; Nanjing Institute of Geology and Palaeontology, Chinese Academy of Science, Nanjing, 210008, China
Recommended Citation:
Jolivet M.,Barrier L.,Dauteuil O.,et al. Late Cretaceous–Palaeogene topography of the Chinese Tian Shan: New insights from geomorphology and sedimentology[J]. Earth and Planetary Science Letters,2018-01-01,499