DOI: 10.1016/j.epsl.2018.05.039
Scopus记录号: 2-s2.0-85047817847
论文题名: Early Miocene birth of modern Pearl River recorded low-relief, high-elevation surface formation of SE Tibetan Plateau
作者: Cao L. ; Shao L. ; Qiao P. ; Zhao Z. ; van Hinsbergen D.J.J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 496 起始页码: 120
结束页码: 131
语种: 英语
英文关键词: Pearl River
; provenance
; South China Sea
; Tibetan Plateau
; topography
; zircon U–Pb geochronology
Scopus关键词: Catchments
; Gems
; Geochronology
; Silicate minerals
; Tectonics
; Topography
; Zircon
; Environmental conditions
; Northern South China Sea
; Pearl River
; Pearl River Mouth basin
; provenance
; South China sea
; Tibetan Plateau
; Topographic analysis
; Rivers
英文摘要: Understanding the paradoxical presence of extensive low-relief surfaces perched above deep valleys in SE Tibet is a long-standing challenge. Its origin, based on topographic analysis, has been explained traditionally by incision of a regional relict landscape or, more recently, by in situ formation in response to drainage area loss feedback. Here we apply a qualitative and quantitative source-to-sink approach to test whether either of the two mechanisms may apply by establishing potential links among detrital zircon provenance of the Oligocene–Miocene Pearl River Mouth Basin, drainage evolution of the Pearl River, and low-relief, high-elevation surface formation in the SE Tibetan Plateau margin. Our zircon record, combined with previous geochemical records from the northern South China Sea, confirms a significant Late Oligocene provenance shift, represented by an intensive addition of Proterozoic zircons and a gradual negative excursion in Nd isotopes. We interpret this provenance shift as a response to a progressive drainage expansion of the Pearl River, evolving from relatively small rivers confined to coastal South China in the Early Oligocene to a near-modern continental-scale drainage configuration in the Early Miocene, which may be correlated with an earlier surface uplift of SE Tibet than previously thought. This westward expansion process of the Pearl River favors the envisaged drainage evolution of the relict landscape model over that of the drainage area loss feedback model, suggesting that the Middle–Late Cenozoic low-relief, high-elevation surface formation in SE Tibet may be readily interpreted as preserving past tectonic and environmental conditions. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109788
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: State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China; Research Institute of China National Offshore Oil Corporation, Beijing, 100027, China; Department of Earth Sciences, Utrecht University, Heidelberglaan 2, Utrecht, 3584 CS, Netherlands
Recommended Citation:
Cao L.,Shao L.,Qiao P.,et al. Early Miocene birth of modern Pearl River recorded low-relief, high-elevation surface formation of SE Tibetan Plateau[J]. Earth and Planetary Science Letters,2018-01-01,496