High-relief topography of the Nima basin in central Tibetan Plateau during the mid-Cenozoic time

Deng, Lihuan; Jia, Guodong

doi:10.1016/j.chemgeo.2018.05.041

Cited by 31 publications

(12 citation statements)

References 117 publications

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“…Lake water d 18 O mw (mw: meteoric water) reconstruction followed Morrill & Koch (2002) according to d 18 O VPDB values for dolomite precipitation. A reference for the isotopic composition of surface lake water was calculated from: (i) micritic limestone (late Eocene in age) from the middle Niubao formation (Rowley & Currie, 1 A reconstructed mean annual air temperature of 21.5 AE 3.1°C derived from branched glycerol dialkyl glycerol tetraether (brGDGT) analysis for the adjacent palaeo-Nima Basin during the mid-Cenozoic (Deng & Jia, 2018).…”

Section: Methodsmentioning

confidence: 99%

Nucleation and stabilization of Eocene dolomite in evaporative lacustrine deposits from central Tibetan plateau

Wen

Sánchez‐Román

et al. 2020

Sedimentology

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In past decades, the formation of dolomite at low temperature has been widely studied in both natural systems and cultured experiments, yet the mechanism(s) involved in the nucleation and precipitation of dolomite remains unresolved. Late Eocene dolomitic deposits from core in the upper Niubao Formation (Lunpola Basin, central Tibetan Plateau, China) are selected as a case study to understand the dolomitization process(es) in the geological record. Dolomite formation in Lunpola Basin can be ascribed to a different mechanism forming the large quantities of replacive dolostones in the geological record; and provides a potential fossil analogue for primary dolomite precipitation at low temperature. This analogue consists of an alternation of laminated dolomitic beds, organic‐rich and siliciclastic layers; formed in response to intense evaporation interpreted to take place in a continental shallow lake environment. Mineralogical, textural and stable isotopic evaluations suggest that the dolomite from those dense‐clotted laminated beds is a primary precipitate. At the nanoscale, these dolomitic beds are composed of Ca–Mg carbonate globular nanocrystals (diameter 80 to 100 nm) embedded in an organic matrix and attached to clay flakes. Micro‐infrared spectroscopy analyses have revealed the presence of aliphatic compounds in the organic matrix. Microscopic and elemental compositional studies suggest that clay surfaces may facilitate the nucleation of dolomite at low temperature in the same way as the organic matrix does. The dolomite laminae show values for δ18OVPDB from −3.2 to −1.76‰ and for δ13CVPDB from −2.62 to −3.78‰. Inferred δ18OSMOW values of the lake water reveal typical evaporitic hydrological conditions. These findings provide a potential link to primary dolomite formation in ancient and modern sedimentary environments; and shed new light on the palaeoenvironmental conditions in central Tibet during the Eocene.

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Section: Methodsmentioning

confidence: 99%

Nucleation and stabilization of Eocene dolomite in evaporative lacustrine deposits from central Tibetan plateau

Wen

Sánchez‐Román

et al. 2020

Sedimentology

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“…It is appropriate to use the local meteoric water line for the transition between δ 2 H and δ 18 O for the following two reasons: (1) The terrestrial higher plants utilize soil water (mainly sourced from precipitation) as the dominant hydrogen source for biosynthesis, the δ 2 H of long chain n-alkanes (from terrestrial plants leaf wax) mainly record the isotopic composition of meteoric water (Sachse et al, 2012). (2) Since the paleometeoric water line is difficult to reconstruct, the modern global and local meteoric water line is widely used for δ 2 H-δ 18 O transition in the paleoelevation estimates (Currie et al, 2016;Deng & Jia, 2018;Jia et al, 2015;Kar et al, 2016).…”

Section: Paleoelevation Calculationmentioning

confidence: 99%

“…The Tibetan Plateau is the largest and highest plateau on Earth. However, when and how the Tibetan Plateau obtained its high elevation remains partially answered (Cyr et al, 2005;Deng & Jia, 2018;Hoke et al, 2014;Jia et al, 2015;Molnar et al, 1993;Tapponnier et al, 2001;Tang et al, 2017;Xu et al, 2013Xu et al, , 2015Wang et al, 2014;Yin & Harrison, 2000;Zuza et al, 2016). Many geodynamic models concerning the mechanism driving the surface uplift of Tibetan Plateau have been proposed in the past few decades: (1) homogeneous thickening of the Tibetan Plateau crust as a viscous sheet (England & Houseman, 1986), implying an overall surface uplift model; (2) underthrusting of Indian lithosphere beneath the Tibetan Plateau (DeCelles et al, 2002;Powell & Conaghan, 1973;van Hinsbergen et al, 2012;Zhao et al, 2011), predicting a gradual northward surface uplift model; (3) vertical inflation of the Tibetan Plateau crust by lower crustal channel flow (Clark & Royden, 2000;Royden et al, 1997), suggesting a eastward surface uplift model; (4) oblique subduction of different blocks of Asian lithosphere initiated in the Eocene but was younging northward, resulting in rigid block extrusion and a northward stepwise growth (Tapponnier et al, 2001); (5) pre-Cenozoic crust thickening by upper crust deformation (Murphy et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

“…Vertical transect studies of soils in the Tibetan Plateau reveal that leaf wax n-alkane hydrogen isotopes are highly correlated with elevation (Bai et al, 2015;Jia et al, 2008). Leaf wax nalkane hydrogen isotope analysis has been applied to Tibetan Plateau, Sierra Nevada, and Andes (Anderson et al, 2015;Currie et al, 2016;Deng & Jia, 2018;Hren et al, 2010;Jia et al, 2015;Polissar et al, 2009;Zhuang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Late Eocene–Oligocene High Relief Paleotopography in the North Central Tibetan Plateau: Insights From Detrital Zircon U–Pb Geochronology and Leaf Wax Hydrogen Isotope Studies

et al. 2020

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The knowledge of provenance and paleoelevation of late Cretaceous-Cenozoic terrestrial basins is crucial in discriminating different topography growth models for Tibetan Plateau. The Hoh Xil Basin is located in the north central Tibetan Plateau, and its thick sediments provide an excellent record for investigating the growth history of Tibetan Plateau. Here we present an integrated study by applying detrital zircon U-Pb geochronology and leaf wax n-alkane hydrogen isotope analysis to the Yaxicuo Group in the Tuotuohe subbasin of the southern Hoh Xil Basin. Maximum depositional age from the youngest detrital zircon U-Pb ages, along with previous palynological data, indicates that the Yaxicuo Group was deposited during late Eocene-Oligocene. Provenance analysis shows that the Yaxicuo Group was mainly sourced from the northern Qiangtang and Songpan-Ganzi terranes. Detrital zircon age spectra of the Yaxicuo Group samples show 33-50 Ma age group in the Tuotuohe subbasin, which is distinctive from those in the Erdaogou subbasin to the north, suggestive of formation of watershed within the Hoh Xil Basin and the tectonic transition from foreland to hinterland basin. The most negative leaf wax hydrogen isotope value yields an estimate of paleoelevation of~4 km, which records the high elevation of the source regions in the northern Qiangtang. We argue that sedimentary record of the Yaxicuo Group with the interpreted transition from foreland to hinterland basin is the result of the northward propagation of the upper crustal shortening, which in combination with other deep processes caused the surface uplift of the Hoh Xil Basin.

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“…However, high‐quality quantitative data remain scarce, due to the lack of terrestrial paleotemperature reconstruction tools and well‐dated continuous stratigraphic sequences. Microbial‐branched glycerol dialkyl glycerol tetraether (brGDGT) paleotemperature proxies, in the form of the MBT (MBT′)/CBT ratios, have been developed (Weijers et al, ) over the past decade and have been widely used to reconstruct terrestrial paleotemperatures (e.g., Donders et al, ; Weijers et al, ) and paleoaltitudes (Anderson et al, ; DeCelles et al, ; Deng & Jia, ; Hren et al, ; Zhuang et al, ). However, these proxies are affected greatly by alkalinity and aridity (Bai et al, ; Dirghangi et al, ; H. Wang et al, ; H. Yang et al, ).…”

Section: Introductionmentioning

confidence: 99%

A Late Miocene Terrestrial Temperature History for the Northeastern Tibetan Plateau's Period of Tectonic Expansion

Chen

Bai

Fang

et al. 2019

Geophysical Research Letters

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Key Points The uplift event (~10.5–8 Ma) revealed by glycerol dialkyl glycerol tetraethers temperature records from the Xining Basin is synchronous with regional drying The cooling amplitude over land is less than that over the ocean during the CO2‐dominated Late Miocene cooling event (~7–5.4 Ma) Tectonic forcing, rather than pCO2, dominated regional continental climate patterns and ecosystem transitions during the Late Miocene

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High-relief topography of the Nima basin in central Tibetan Plateau during the mid-Cenozoic time

Cited by 31 publications

References 117 publications

Nucleation and stabilization of Eocene dolomite in evaporative lacustrine deposits from central Tibetan plateau

Nucleation and stabilization of Eocene dolomite in evaporative lacustrine deposits from central Tibetan plateau

Late Eocene–Oligocene High Relief Paleotopography in the North Central Tibetan Plateau: Insights From Detrital Zircon U–Pb Geochronology and Leaf Wax Hydrogen Isotope Studies

A Late Miocene Terrestrial Temperature History for the Northeastern Tibetan Plateau's Period of Tectonic Expansion

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