Spatial and temporal pattern of erosion in the Three Rivers Region, southeastern Tibet

Yang, Rong; Fellin, Maria Giuditta; Herman, Frédéric; Willett, Sean D.; Wei, Wang; Maden, C.

doi:10.1016/j.epsl.2015.10.032

Cited by 91 publications

(93 citation statements)

References 55 publications

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“…3) between 18 and 9 Ma, using burial ages of sediments collected in abandoned caves preserved above tributaries of the Yangtze River. These data are located close to the two bedrock AHe ages of Yang et al (2016) of 38 Ma and 29 Ma and to the altitudinal profile of Shen et al (2016), which yielded AHe ages that range from 31 to 18 Ma and have a positive correlation with elevation, interpreted as a cooling episode related to fluvial incision. Yang et al (2016) also reported a single sample yielding a mean AHe age of 31 Ma (sample Yan08; Fig.…”

Section: Local Incision History and Its Implications For The Cenozoicsupporting

confidence: 62%

“…If during the Miocene, incision was less than ~2 km (as proposed by McPhillips et al, 2016), then it would have limited effects on the AHe system, which in turn would not record this late incision phase. This could explain why the thermochronometry data (Yang et al, 2016;Shen et al, 2016;Cao et al, 2019) predate the incision history recorded by the burial dating conducted by McPhillips et al (2016). Thus, it is possible that at least two exhumation episodes occurred near the first bend between the Eocene and the Miocene and that uplift (or at least exhumation) occurred through distinct phases.…”

Section: Local Incision History and Its Implications For The Cenozoicmentioning

confidence: 87%

“…In tributaries located a few kilometers west of the first bend, moderate river incision occurred from 18 to 9 Ma (McPhillips et al, 2016). However, in the same area, Yang et al (2016) reported a late Eocene AHe age. Based on AHe ages ranging from 30 to 20 Ma, Shen et al (2016) proposed that incision occurred during the Miocene-early Oligocene, which was confirmed by new AHe and fission-track data by Cao et al (2019), who showed a rapid exhumation phase from 28 to 20 Ma.…”

Section: Introductionmentioning

confidence: 92%

“…In three cases, we were unable to find sufficient apatite of high quality (Table 1). A complete description of sample preparation and analytical technique is provided in Yang et al (2016), and the error and reproducibility calculations are explained in the Data Repository.…”

Section: (U-th)/he Thermochronometrymentioning

confidence: 99%

“…1). Several studies based on different techniques have constrained erosion in several locations along these rivers at the million-year time scale (Clark et al, 2005;Ouimet et al, 2010;Wilson and Fowler, 2011;Duvall et al, 2012;Tian et al, 2014;Ping et al, 2015;Zhang et al, 2015;Shen et al, 2016;Yang et al, 2016;McPhillips et al, 2016;Liu-Zeng et al, 2018;Nie et al, 2018) and at the 1-100 k.y. time scale (Henck et al, 2011;Zhang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Evolution of the Yangtze River network, southeastern Tibet: Insights from thermochronology and sedimentology

et al. 2019

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We performed apatite and zircon (U-Th)/He dating on a granitic pluton that has been offset by ~10 km by motion on the sinistral strikeslip Xiangcheng fault in SW Sichuan, SE Tibetan plateau, where the Shuoqu River incises a deep valley before joining the upper Yangtze River. Mean ZHe cooling ages range from 49.5 ± 2.2 Ma to 68.6 ± 6.0 Ma. Samples located above 3870 m yield mean apatite (U-Th)/He ages ranging from 30.6 ± 1.4 Ma to 40.6 ± 2.7 Ma, whereas samples at lower elevations range from 9.8 ± 1.3 Ma to 14.6 ± 2.7 Ma. In the same region, Cenozoic continental sediments are exposed on the flanks of deep valleys. They consist of unsorted conglomerates and sandstones that partly fill a paleotopography. The sediments were deposited during an episode of rapid sedimentation, followed by incision that varies between 0.5 and 1.2 km. Thermal and exhumational modeling of the granite thermochronometric data indicates rapid cooling during the middle Miocene that was likely related to fluvial incision. Our findings suggest that the upper Yangtze River and its tributary (Shuoqu) were connected by the middle Miocene. Our modeling also supports the idea that the exhumation pattern during the Cenozoic in the southeastern margin of the Tibetan Plateau is spatially and temporally heterogeneous.

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Section: Local Incision History and Its Implications For The Cenozoicsupporting

confidence: 62%

Section: Local Incision History and Its Implications For The Cenozoicmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 92%

Section: (U-th)/he Thermochronometrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evolution of the Yangtze River network, southeastern Tibet: Insights from thermochronology and sedimentology

et al. 2019

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Late Cenozoic tectonic evolution of the Ailao Shan-Red River fault (SE Tibet): Implications for kinematic change during plateau growth

et al. 2016

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Surface uplift, river incision, shear zone exhumation, and displacement along active faults have all interacted to shape the modern landscape in the southeastern margin of the Tibetan Plateau. The Ailao Shan‐Red River fault, a major structure in the tectonic evolution of southeastern Asia, is an excellent recorder of these processes. We present new stratigraphic, structural, and low‐temperature thermochronologic data to explore its late Cenozoic tectonic and geomorphic evolution. The stratigraphic and structural observations indicate that the major bend in the fault was a releasing bend with significant Miocene sedimentation in the early–middle Miocene but became a restraining bend with abundant shortening structures developed after the late Miocene reversal of displacement. We also document exhumation of the shear zone from two low‐temperature thermochronologic transects. New apatite (U‐Th)/He(AHe) data and published thermochronologic results reveal two accelerated cooling episodes, backed by stratigraphic and geomorphic observations. The first rapid cooling phase occurred from ca. 27 to 17 Ma with removal of cover rocks and exhumation of the shear zone. The second accelerated cooling episode revealed by our AHe data commenced at 14–13 Ma, lasting 2–3 Myr. The Ailao Shan range may have risen to its modern elevation with high‐relief topography developing due to river incision. We interpret the onset of this rapid exhumation to reflect renewed plateau growth associated with lower crustal flow.

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Late Quaternary drainage reorganization assisted by surface faulting: The example of the Katrol Hill Fault zone, Kachchh, western India

Maurya

Tiwari

Shaikh

et al. 2021

Earth Surf Processes Landf

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Drainage reorganization on restricted temporal and spatial scales is poorly‐documented. We attempt to decode the relatively complicated mechanism of drainage realignment involving two small rivers that show structurally controlled, highly anomalous channel networks. We provide geomorphic and shallow subsurface evidence using ground‐penetrating radar (GPR) for the presence of a buried paleo‐valley flowing northward through the wind gap and surface faulting along the range bounding Katrol Hill Fault (KHF) which correlates with the previously known three surface faulting events in last ~30 ka bp. Most of the present river channels and the KHF zone are occupied by aeolian miliolite (local name) which is stratigraphic and lithologic equivalent of the Late Quaternary carbonate rich aeolianite deposits occurring in several parts of the globe. The history of drainage evolution in the study area comprises pre‐miliolite, syn‐miliolite and post‐miliolite phases. Geomorphic evidences show that the paleo‐Gangeshwar River flowed north through the wind gap and paleo‐valley, while the short paleo‐Gunawari occupied the saddle zone to the east of Ler dome prior to and during the phase of miliolite deposition which ended by ~40 ka bp. Southward tilting of the Katrol Hill Range (KHR) due to surface faulting cut off the catchment of the paleo‐Gangeshwar River. The abandoned catchment stream extended its channel eastward along the strike through top‐down process while the paleo‐Gunawari River extended its course westward by headward erosion (bottom‐up process). As the channels advanced towards each other they joined to produce the “S”‐shaped bend which formed the capture point. We conclude that multiple surface faulting events along the KHF in the last ~30 ka bp, resulted in uplift and tilting of the KHR which caused drainage realignment by river diversion, beheading and river capture. Our study shows that the complexity of drainage reorganization processes is more explicit on shorter rather than longer timescales.

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Spatial and temporal pattern of erosion in the Three Rivers Region, southeastern Tibet

Cited by 91 publications

References 55 publications

Evolution of the Yangtze River network, southeastern Tibet: Insights from thermochronology and sedimentology

Evolution of the Yangtze River network, southeastern Tibet: Insights from thermochronology and sedimentology

Late Cenozoic tectonic evolution of the Ailao Shan-Red River fault (SE Tibet): Implications for kinematic change during plateau growth

Late Quaternary drainage reorganization assisted by surface faulting: The example of the Katrol Hill Fault zone, Kachchh, western India

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