Tectonic evolution of the Qingshuihe Basin since the Late Miocene: Relationship with north‐eastward expansion of the Tibetan Plateau

2019 ◽  
Vol 55 (11) ◽  
pp. 7148-7166 ◽  
Author(s):  
Jingxiong Tian ◽  
Mingtao Li ◽  
Zhirong Liang ◽  
Liming Li ◽  
Guoxiang Yan ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Miocene ◽  
Tectonic Evolution ◽  
The Tibetan Plateau

Tectonic evolution and dynamics of the Tibetan Plateau

2017 ◽  
Vol 41 ◽  
pp. 1-8 ◽  
Author(s):  
Zeming Zhang ◽  
Lin Ding ◽  
Zhidan Zhao ◽  
M. Santosh
Keyword(s):  
Tibetan Plateau ◽  
Tectonic Evolution ◽  
The Tibetan Plateau

“Tiny wiggles” in the Late Miocene red clay deposits in the north‐east of the Tibetan Plateau

2021 ◽  
Author(s):  
Rui Zhang ◽  
Xiaohao Wei ◽  
Vadim A. Kravchinsky ◽  
Leping Yue ◽  
Yan Zheng ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Miocene ◽  
The Tibetan Plateau ◽  
Red Clay ◽  
North East ◽  
The North ◽  
Clay Deposits

Paleoaltitudinal histories for the northern and southern margins of the Tibetan Plateau during the Late Cenozoic: revealed by GDGTs

2021 ◽  
Author(s):  
Chihao Chen ◽  
Yan Bai ◽  
Xiaomin Fang ◽  
Haichao Guo ◽  
Weilin Zhang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Miocene ◽  
Global Climate ◽  
The Tibetan Plateau ◽  
Lake Surface ◽  
Terrestrial Organic Matter ◽  
Plant Fossils ◽  
History Of ◽  
Monsoon System ◽  
Uplift History

<p>As an important driver of global climate change during the Cenozoic, the uplift of the Tibetan Plateau (TP) has strongly influenced the origination and evolution of the Asian monsoon system, and therefore the aridification of central Asia. Over the last two decades, the application of stable isotope paleoaltimeters and the discoveries of mammal and plant fossils have greatly promoted the understanding of the uplift history of the TP. However, paleoaltitudinal reconstructions based on different paleoaltimeters have suggested differing outcomes and therefore remain controversial. Novel paleoaltimeters have therefore needed to be developed and applied to constrain the uplift history of the TP more accurately and effectively by comparing and verifying multi-proxies. Paleothermometers based on glyceryl dialkyl glycerol tetraethers (GDGTs) are widely used in terrestrial and ocean temperature reconstructions. In this study, GDGT-based paleothermometers were tentatively applied to the Gyirong Basin on the southern TP, and the Xining Basins on the northern TP, in an attempt to quantitatively reconstruct their paleoaltitudes.</p><p>Both soil and aquatic-typed branched GDGTs have been identified from Late Miocene to Mid-Pliocene (7.0-3.2 Ma) samples taken from the Gyirong Basin; their reconstructed paleotemperatures were 7.5±3.3°C and 14.2±4.5°C, respectively. The former temperature may represent the mean temperature of the terrestrial organic matter input area, while the latter may represent the lake surface temperature. The results would suggest that the lake surface of the Gyirong Basin during the Late Miocene to Mid-Pliocene was 2.5±0.8 km and that the surrounding mountains exceeded 3.6±0.6 km, implying that the central Himalayas underwent a rapid uplift of ~1.5 km after the Mid-Pliocene.</p><p>GDGT-based paleotemperature reconstructions using MBT'<sub>5ME</sub> values show that the Xining Basin dropped in temperature by ~10°C during the ~10.5-8 Ma period, exceeding that in sea surface temperatures and low-altitude terrestrial temperatures during these periods. By combining these results with contemporaneous tectonic and sedimentary records, we infer that these cooling events signaled the regional uplift with the amplitude of ~1 km of the Xining basins. Our results support that the TP was still growing and uplifting substantially since the Late Miocene, which may provide new evidence for understanding the growth, expansion and uplift patterns of the TP.</p>

Cenozoic tectonic evolution of the Tibetan Plateau - the Nepal Himalaya and the provenance of their foreland basins

2016 ◽  
Vol 52 (4) ◽  
pp. 646-666 ◽  
Author(s):  
Bhupati Neupane ◽  
Yiwen Ju ◽  
Fengqi Tan ◽  
Upendra Baral ◽  
Prakash Das Ulak ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Tectonic Evolution ◽  
The Tibetan Plateau ◽  
Foreland Basins ◽  
Nepal Himalaya

Late Mesozoic tectonic evolution and growth of the Tibetan plateau prior to the Indo-Asian collision

2012 ◽  
Vol 114 (3-4) ◽  
pp. 236-249 ◽  
Author(s):  
Kai-Jun Zhang ◽  
Yu-Xiu Zhang ◽  
Xian-Chun Tang ◽  
Bin Xia
Keyword(s):  
Tibetan Plateau ◽  
Tectonic Evolution ◽  
The Tibetan Plateau ◽  
Late Mesozoic

Cenozoic uplift and deformation of the Tibetan Plateau: the geomorphological evidence

1988 ◽  
Vol 327 (1594) ◽  
pp. 365-377 ◽  
Keyword(s):  
Tibetan Plateau ◽  
Late Miocene ◽  
The Tibetan Plateau ◽  
Crustal Shortening ◽  
Erosion Surface

An erosion surface, interpreted as a pediplain, is traced across the Tibetan Plateau. As a result of faulting and warping, its elevation now varies from approximately 4500-6000m. It was cut across folded and thrust Eocene strata and mid-Miocene granites, but was dislocated by major faults before the Pliocene. Its age is thought to be mid- to late Miocene. Crustal shortening after pediplanation is small. If the crust beneath the Plateau was thickened by deformation during crustal shortening, the thickening must mainly have occurred before the pediplanation.

scholarly journals Late Miocene–Pliocene climate evolution recorded by the red clay cover on the Xiaoshuizi planation surface, NE Tibetan Plateau

2019 ◽  
Vol 15 (2) ◽  
pp. 405-421 ◽  
Author(s):  
Xiaomiao Li ◽  
Tingjiang Peng ◽  
Zhenhua Ma ◽  
Meng Li ◽  
Zhantao Feng ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Miocene ◽  
Asian Summer Monsoon ◽  
Chinese Loess Plateau ◽  
The Tibetan Plateau ◽  
Red Clay ◽  
Climate History ◽  
Study Region ◽  
Planation Surface ◽  
History Of

Abstract. The Pliocene climate and its driving mechanisms have attracted substantial scientific interest because of their potential as an analog for near-future climates. The late Miocene–Pliocene red clay sequence of the main Chinese Loess Plateau (CLP) has been widely used to reconstruct the history of interior Asian aridification and the Asian monsoon. However, red clay sequences deposited on the planation surface of the Tibetan Plateau (TP) are rare. A continuous red clay sequence was recently discovered on the uplifted Xiaoshuizi (XSZ) planation surface in the Maxian Mountains, northeastern (NE) TP. In this study, we analyzed multiple climatic proxies from the XSZ red clay sequence with the aim of reconstructing the late Miocene–early Pliocene climate history of the NE TP and to assess regional climatic differences between the central and western CLP. Our results demonstrate the occurrence of minimal weathering and pedogenesis during the late Miocene, which indicates that the climate was arid. We speculate that precipitation delivered by the paleo East Asian summer monsoon (EASM) was limited during this period and that the intensification of the circulation of the westerlies resulted in arid conditions in the study region. Subsequently, enhanced weathering and pedogenesis occurred intermittently during 4.7–3.9 Ma, which attests to an increase in effective moisture. We ascribe the arid–humid climatic transition near ∼4.7 Ma to the expansion of the paleo-EASM. The warming of the high northern latitudes in response to the closure of the Panama Seaway may have been responsible for the thermodynamical enhancement of the paleo-EASM system, which permitted more moisture to be transported to the NE TP.

scholarly journals Channel Profile Response to Abrupt Increases in Mountain Uplift Rates: Implications for Late Miocene to Pliocene Acceleration of Intracontinental Extension in the Northern Qinling Range-Weihe Graben, Central China

Lithosphere ◽  
2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Yizhou Wang ◽  
Dewen Zheng ◽  
Huiping Zhang ◽  
Jingxing Yu ◽  
Jianzhang Pang ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Miocene ◽  
Central China ◽  
Normal Faults ◽  
The Tibetan Plateau ◽  
Uplift Rates ◽  
Channel Steepness ◽  
Ne Tibetan Plateau ◽  
Weihe Graben ◽  
Tectonic Forcing

Abstract Cenozoic extension of the Qinling range-Weihe Graben system has occurred in response to the uplift and growth of the Tibetan Plateau. Rapid exhumation of the northern Qinling range since the late Miocene is also regarded as resulting from the eastward expansion of the northeast part of Tibet. Tectonic evidence of this in the landscape remains unclear, but the fluvial system can provide a sensitive proxy record of tectonic forcing through space and over time scales of 105–107 a. Here, we present a study of channel profiles in the northern Qinling range, which forms a footwall highland separated from the southern Weihe Graben by active normal faults. We identify a population of knickpoints that separate river profiles with a gentle upstream gradient from steeper downstream reaches. Above the knickpoints, steepness indices increase from the central part towards the west and east, whereas channel steepness shows its highest values in the Huaxian-Huayin section. We observed no systematic changes of channel steepness pattern as a function of rock resistance, drainage area, or channel concavity. Correlation analysis between channel steepness and basin elevation and relief documents the control of tectonic forcing on regional topography. While bearing no relation to geological outcrop boundaries, the knickpoints show a strong correlation between retreat distance, catchment area, and river length. We infer that the knickpoints formed in response to an increase in mountain uplift rates and retreated as a kinematic wave. Under linear slope exponent n, we calibrated channel erodibility K~1.00±0.44×10−6 m0.1/a and derived knickpoint ages of 5.59±1.80 Ma. Combining the ages of onset of active faulting and mountain growth in the NE Tibetan Plateau (8–10 Ma, e.g., Liupan Shan, Jishi Shan, and eastern segments of the Haiyuan and Kunlun faults) and in the southwest Qinling range (9–4 Ma), we conclude that growth of the NE Tibetan Plateau began in the mid-Miocene time and expanded eastwards to the Qinling range-Weihe Graben during the late Miocene and early Pliocene.

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