Internal Drainage Has Sustained Low‐Relief Tibetan Landscapes Since the Early Miocene

Han, Zehua; Sinclair, H. Q.; Li, Yalin; Wang, Chengshan; Tao, Zui; Qian, Xinyu; Zhong, Ning; Zhang, Jiawei; Wen, Yixiong; Lin, Jie; Zhang, Baosen; Xu, Minggang; Dai, Jingen; Zhou, Aorigele; Liang, Huimin; Cao, Shuo

doi:10.1029/2019gl083019

Cited by 47 publications

(40 citation statements)

References 92 publications

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“…We thus suggest that the surface processes responsible for lowering high-relief ranges and infilling of adjacent lowlands may have also been responsible for the formation of low-relief plateau surfaces at high elevations in the northeastern Qiangtang terrane during early Cenozoic times. This interpretation is analogous to previous models for the presence of low-relief landscapes in central Tibet 4,9,14 . At least 3-5 km of syntectonic sediments were shed into the foreland basins (e.g., Sichuan, Xichang and Chuxiong basins;…”

supporting

confidence: 89%

Southwestward growth of plateau surfaces in eastern Tibet

Cao

Replumaz

Tian

et al. 2020

Preprint

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Both the kinematics and dynamics for topographic growth of the Tibetan Plateau remain debated despite their significance for understanding the evolution of continental lithospheric geodynamics, climate, and biodiversity in Asia. Morphometric analysis reveals the continuity of high-elevated peneplains through the Songpan-Garze-Yidun, Qiangtang and Lhasa terranes in eastern Tibet. Inverse thermal-history modeling of thermochronological data indicates slow cooling of these terranes since 80-60 Ma, 40-35 Ma and 20-5 Ma, respectively, which is interpreted as marking tectonic and topographic stabilization of the plateau surfaces. The diachronous stabilization of flat plateau surfaces and early encroachment suggests decoupling of plateau surface formation from Neogene river incision and tectonics. This southwestward piecemeal expansion of small plateaus suggests that the high-elevation, low-relief landscape of eastern Tibet has been constructed during distinct orogenic episodes prior and during the early stages of India-Asia collision. A late stage of tectonic activity during Neogene only moderately remodeled the outer rims of the plateaus and the valleys that delineate the transcurrent faults, while lower crustal channel flow only leveled the distinct plateaus to a unique elevation, thereby triggering river incision in eastern Tibet.

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confidence: 89%

Southwestward growth of plateau surfaces in eastern Tibet

Cao

Replumaz

Tian

et al. 2020

Preprint

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“…During the soft collision, there are over 2,000 km in length Great India crust has subducted into the mantle beneath the Eurasian Plate during the soft collision age (Patriat & Achache, 1984;van Hinsbergen et al, 2012van Hinsbergen et al, , 2019Yi et al, 2011). Continuous subduction of Indian Plate combined with the mantle lithosphere of the Eurasian Plate may have caused north-south contraction of the asthenospheric channel, inducing the asthenosphere flowed eastward (Han et al, 2019;Yin & Taylor, 2011).…”

Section: Two Stages Of Tectonic Activity In the Hsamentioning

confidence: 99%

Cenozoic tectonic evolution of South China: A brief review, and new insights from the Huangshadong‐Shiba area, south‐east China

Kuang

Wang

et al. 2020

Geological Journal

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The Cenozoic tectonic dynamic process controlled by the Pacific subduction and Tethyan subduction/collision in South China are still controversial and lacks geological evidence of intracontinental deformation to define. Here, we focused on the Huangshadong-Shiba area (HSA) in the southeastern coastal area of China. This study aims to obtain multi-stage geological events by an integrated multidisciplinary investigation to decipher the multiple tectonic deformation in Cenozoic South China. We found that the Jurassic and Cretaceous granite not only dominates in surface magmatic rocks but also integrates into a whole with buried depth more than 2 km. This plate-like granite (it means the occurrence of granite is like a tremendous plate) with thickness more than 3 km is sliced by Heyuan Fault, Renzishi Fault, and Zijin-Boluo Fault. The basalts in the Shiba Basin have an Ocean Island Basalt-like property, and the Heyuan Fault controlled the distribution of basalt. Our results, merged with a review of the Cenozoic tectonic evolution in South China, emphasise the decisive role of the India-Eurasia collision on the tectonics of South China in the Palaeogene and suggest the continuous northward drift of the Philippine Sea Plate and Australian Plate had a substantial effect on South China in the Neogene. This study also proposes a two-stage tectonic activity model to visualise the Cenozoic tectonic activity acting on the HSA or South China.

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“…The Lunpola Basin is a prime location for determining the elevation history of the Tibetan Plateau. It is located in the central part of the plateau, and its sedimentary deposits are estimated to range in age from Eocene to Late Miocene (15)(16)(17)(18), spanning most of the interval covering the collision of India and Asia and the resulting tectonic deformation and plateau growth. Continuous fluviolacustrine sedimentary outcrops contain rich and well-preserved fossil assemblages as well as pristine pedogenic carbonate and organic-rich horizons that have been used to infer paleoelevations (9,(19)(20)(21)(22)(23)(24).…”

Section: Introductionmentioning

confidence: 99%

Revised chronology of central Tibet uplift (Lunpola Basin)

et al. 2020

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Knowledge of the topographic evolution of the Tibetan Plateau is essential for understanding its construction and its influences on climate, environment, and biodiversity. Previous elevations estimated from stable isotope records from the Lunpola Basin in central Tibet, which indicate a high plateau since at least 35 Ma, are challenged by recent discoveries of low-elevation tropical fossils apparently deposited at 25.5 Ma. Here, we use magnetostratigraphic and radiochronologic dating to revise the chronology of elevation estimates from the Lunpola Basin. The updated ages reconcile previous results and indicate that the elevations of central Tibet were generally low (<2.3 km) at 39.5 Ma and high (3.5 to 4.5 km) at ~26 Ma. This supports the existence in the Eocene of low-elevation longitudinally oriented narrow regions until their uplift in the early Miocene, with potential implications for the growth mechanisms of the Tibetan Plateau, Asian atmospheric circulation, surface processes, and biotic evolution.

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Internal Drainage Has Sustained Low‐Relief Tibetan Landscapes Since the Early Miocene

Cited by 47 publications

References 92 publications

Southwestward growth of plateau surfaces in eastern Tibet

Southwestward growth of plateau surfaces in eastern Tibet

Cenozoic tectonic evolution of South China: A brief review, and new insights from the Huangshadong‐Shiba area, south‐east China

Revised chronology of central Tibet uplift (Lunpola Basin)

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