scholarly journals Eocene to late Oligocene history of crustal shortening within the Hoh Xil Basin and implications for the uplift history of the northern Tibetan Plateau

Tectonics ◽  
2016 ◽  
Vol 35 (4) ◽  
pp. 862-895 ◽  
Author(s):  
Lydia M. Staisch ◽  
Nathan A. Niemi ◽  
Marin K. Clark ◽  
Hong Chang
Keyword(s):  
Tibetan Plateau ◽  
Late Oligocene ◽  
Crustal Shortening ◽  
Northern Tibetan Plateau ◽  
History Of ◽  
Uplift History

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>

New age determination of the Cenozoic Lunpola basin, central Tibet

2011 ◽  
Vol 149 (1) ◽  
pp. 141-145 ◽  
Author(s):  
HUAIYU HE ◽  
JIMIN SUN ◽  
QIULI LI ◽  
RIXIANG ZHU
Keyword(s):  
Isotope Composition ◽  
Age Determination ◽  
The Tibetan Plateau ◽  
Late Oligocene ◽  
Geological Past ◽  
History Of ◽  
Uplift History ◽  
Central Tibet ◽  
Important Basis

AbstractKnowing when the Tibetan Plateau reached its present elevation is important for understanding the uplift history of Tibet. Recently, Rowley & Currie (2006) suggested that central Tibet exceeded 4000 m from 35 Ma to the Pliocene using the oxygen-isotope composition of calcareous minerals in Lunpola basin sediments. However, they adopted a poor age assignment for the Dingqing Formation in the Lunpola basin based on previous microfossil studies. In this study, we present SIMS U–Pb zircon dates from a bentonite layer intercalated within the middle to lower Dingqing Formation. Twenty-six measurements yield a highly reliable U–Pb age of 23.5 ± 0.2 Ma (2σ, MSWD = 1.1), suggesting that the deposition age of the Dingqing Formation is late Oligocene to early Miocene, much older than the Miocene–Pliocene age used by Rowley & Currie (2006). This age robustly constrains the age of Cenozoic sedimentary strata in central Tibet, and hence provides an important basis for estimating the palaeoelevation in the high Tibet during the geological past.

Origin and development of Artemisia (Asteraceae) in Asia and its implications for the uplift history of the Tibetan Plateau: A review

2011 ◽  
Vol 236 (1-2) ◽  
pp. 3-12 ◽  
Author(s):  
Miao Yunfa ◽  
Meng Qingquan ◽  
Fang Xiaomin ◽  
Yan Xiaoli ◽  
Wu Fuli ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
The Tibetan Plateau ◽  
History Of ◽  
Uplift History

PARTITIONING OF CRUSTAL SHORTENING IN THE NORTHERN TIBETAN PLATEAU: CONSTRAINTS FROM THERMOCHRONOLOGY STUDIES

2016 ◽  
Author(s):  
Guangsheng Zhuang ◽  
◽  
Sam Johnstone ◽  
Jeremy Hourigan ◽  
Peter C. Lippert ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Crustal Shortening ◽  
Northern Tibetan Plateau
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