藏南安岗地堑的史前大地震遗迹、年龄及其地质意义

海, 吴中; 叶培盛,; 王成敏,; 张克旗,; 赵华,; 郑勇刚,; 尹金辉,; 李虎侯,

doi:10.3799/dqkx.2015.147

Cited by 7 publications

(4 citation statements)

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“…Journal of Geophysical Research: Solid Earth obtained in the Yangbajing graben (Wu et al, 2004) and of 0.8-1.3 mm/yr (#8) in the Angang graben (Wu et al, 2015). Most of these values correlate well with those we determine here.…”

Section: 1029/2019jb019106supporting

confidence: 87%

“…From north to south, the late Quaternary extension rates we determine here vary between 6.0 ± 1.8 mm/yr (GM), 3.1 ± 0.6 mm/yr (GuT), <1.6 mm/yr (DT), and a total of 1.2 ± 0.2 mm/yr across the southern Yangbajing graben (0.9 ± 0.1 mm/yr at YM +0.3 ± 0.1 mm/yr at GyT) ( Figure 19), that is, 3-6 mm/yr north of the Gulu bend and 1.3 ± 0.3 mm/yr south of it. While the average rates we obtain between Damxung and Gyekar are in fair agreement with those inferred earlier (Armijo et al, 1986), and with those measured along a few other south Tibetan rifts (Chevalier et al, 2012;Ha et al, 2019;Kali, 2010;Wang et al, 2020;Wu et al, 2004Wu et al, , 2015, the rates we determine closer to Gulu (north of the 90°Gulu bend) are not, in keeping with the particularly impressive and youthful tectonic morphology initially noted by Armijo et al (1986Armijo et al ( , 1989.…”

Section: Extension Rates Along the Northern Ygrsupporting

confidence: 86%

“…Using the same technique, Kali (2010) measured vertical throw rates of~1.2 and~1.7 mm/yr along the western (Kharta) and eastern (Dinggye) normal faults bounding the Ama Drime horst along the Dinggye/Ama Drime graben (Figure 1a), respectively. Along the northern YGR, Wu et al (2004Wu et al ( , 2015 used electron spin resonance (ESR), optically stimulated luminescence (OSL), and U-series dating of vertically offset alluvial surfaces to constrain normal throw rates. Rates of 1.4 ± 0.6 mm/yr during the Holocene and of 1.1 ± 0.3 mm/yr during the Quaternary (#7a and #7b in Figure 19 and Table 3, respectively) were…”

Section: Journal Of Geophysical Research: Solid Earthmentioning

confidence: 99%

“…Due to remoteness at high elevation and lack of infrastructures, field investigations of the late Quaternary deformation in central Tibet have been few and far apart (e.g., Armijo et al, 1986Armijo et al, , 1989Blisniuk et al, 2001;Han et al, 2019;Li et al, 2018;Ratschbacher et al, 2011;Taylor et al, 2003;Yin et al, 1999). While pioneering studies using satellite imagery and fault plane solutions helped clarify Tibetan faulting patterns on a broad scale (e.g., Molnar & Lyon-Caen, 1989;Molnar & Tapponnier, 1978;Ni & York, 1978;Tapponnier et al, 1981), attempts to quantitatively determine late Quaternary rates along the numerous active normal faults still remain punctual (Blisniuk & Sharp, 2003;Chevalier et al, 2012;Ha et al, 2019;Kali, 2010;Li et al, 2019;Wang et al, 2020;Wu et al, 2004Wu et al, , 2015.…”

Section: Introductionmentioning

confidence: 99%

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Late Quaternary Extension Rates Across the Northern Half of the Yadong‐Gulu Rift: Implication for East‐West Extension in Southern Tibet

et al. 2020

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The presence of ~NS‐trending rifts within the Tibetan Plateau attests that it is undergoing ~EW extension. In southern Tibet, the total extension rate, distributed across seven main rifts over a distance of ~1,000 km, has been inferred to amount to about half of the shortening rate across the Himalayas. Quantifying the late Quaternary extension rates across the largest rift (Yadong‐Gulu rift [YGR]) is important to understand Tibetan deformation and to discuss the high plateau evolution during the later stages of continental collision. We performed 10Be surface‐exposure cosmogenic nuclide dating of 57 samples from three fluvial surfaces and two moraines that are vertically offset by the normal faults bounding the northern YGR. After carefully assessing individual ages at each site, to elucidate scatter in the age distributions, we obtained ~EW extension rates of up to 3–6 mm/yr near the northern end of the rift (Gulu) and of only 1.3 ± 0.3 mm/yr in the south (Yangbajing). The fast rates in the north may be influenced by dextral slip along the Beng Co fault, whose rate ought to be at least 6.0 ± 1.8 mm/yr. The total late Quaternary extension rate of 9 ± 2 mm/yr we infer across southern Tibet between ~81°E and 92°E, assuming similar rates across each rift, is similar to earlier, qualitative inferences and consistent with recent geodetic results. Distinct deformation rates north and south of the Bangong‐Nujiang suture may reflect significant differences between the extensional kinematics and mechanisms across the Qiangtang and Lhasa blocks.

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Section: 1029/2019jb019106supporting

confidence: 87%

Section: Extension Rates Along the Northern Ygrsupporting

confidence: 86%

Section: Journal Of Geophysical Research: Solid Earthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Late Quaternary Extension Rates Across the Northern Half of the Yadong‐Gulu Rift: Implication for East‐West Extension in Southern Tibet

et al. 2020

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Rock Avalanches in the Tibetan Plateau of China

Wang,

Cheng,

Lin

et al. 2023

Progress in Landslide Research and Technology

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China is a country with high mountainous areas widely distributed, which is characterized by high reliefs, intensive tectonic activity, fragile ecological environments, etc. Under such particular background, rock avalanches, as one of the most threatening geological disasters in the high mountainous regions, have drawn much scientific interest because of their sudden occurrence, huge volumes (>106 m3), high velocities (>20 m/s), and extremely low Fahrböschung (typically 0.1 to 0.3) with destructive disasters caused. Focusing on the Tibetan Plateau of China, spatial distribution of rock avalanches in its certain area was conducted, hoping to provide insights into the controlling factors of rock avalanches’ formation. Furthermore, several typical rock avalanches were investigated in detail based on remote sensing analysis, mapping of fixed wing unmanned aerial vehicle and detailed field investigations. It is reached that toreva blocks, transverse and longitudinal ridges, ridges separated by conjugate troughs, and hummocks are common and widely distributed surficial landforms in rock avalanche deposits, which usually display in a clear sequential distribution. In the cross-section, a series of internal sedimentary structures, including jigsaw structures, inner shear zones, diapiric structures, convoluted laminations, faults, etc., were identified. Based on these detailed geological features, the possible emplacement processes and mechanisms are discussed to provide insights into the extremely high mobility of rock avalanches.

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Late Quaternary vertical slip rates along the Southern Yadong–Gulu Rift, Southern Tibetan Plateau

Liu

2019

Tectonophysics

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藏南安岗地堑的史前大地震遗迹、年龄及其地质意义

Cited by 7 publications

References 0 publications

Late Quaternary Extension Rates Across the Northern Half of the Yadong‐Gulu Rift: Implication for East‐West Extension in Southern Tibet

Late Quaternary Extension Rates Across the Northern Half of the Yadong‐Gulu Rift: Implication for East‐West Extension in Southern Tibet

Rock Avalanches in the Tibetan Plateau of China

Late Quaternary vertical slip rates along the Southern Yadong–Gulu Rift, Southern Tibetan Plateau

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