Juntao Cai

Guangzhou Research Institute of Non-ferrous Metals

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Xiaobin Chen

Institute of Geology, China Earthquake Administration

Lifeng Wang

Institute of Geology, China Earthquake Administration

Yan Zhan

China Earthquake Administration

Ji Tang

China Earthquake Administration

Guoze Zhao

Institute of Geology, China Earthquake Administration

Zhongyin Liu

China Earthquake Administration

Bing Han

Institute of Geology, China Earthquake Administration

Qibin Xiao

Institute of Geology, China Earthquake Administration

Jijun Wang

Shanghai Mental Health Center

Feng Jiang

Southern University of Science and Technology

Cooperative Institutions

China Earthquake Administration

Institute of Geology, China Earthquake Administration

Chinese Academy of Sciences

Jinan University

National Institute of Hospital Administration

Shanghai Jiao Tong University

Central South University

Czech Academy of Sciences, Institute of Geology

Peking University

Southern University of Science and Technology

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Three-dimensional electrical structure in the northwestern sector of the Sichuan-Yunnan diamond block

Frontiers in Earth Science (2025)

Yunyun Zhang Xiaobin Chen Peijie Wang Juntao Cai Zhongyin Liu

The Sichuan-Yunnan diamond block is a significant region of material flow from the Tibetan Plateau. However, its northwest electrical boundary remains undefined. Our study conducted a magnetotelluric profile from Chazha to Luomai across the geological boundary of the Sichuan-Yunnan block in its northwest sector. Using the nonlinear conjugate gradient three-dimensional inversion method, we obtained the deep electrical structure across the northern part of the block. Our findings reveal distinct segmental characteristics in the electrical structure along the profile. Marked by a high-resistivity zone along the Dedeng-Batang-Riyu fault, two high-conductivity layers exist in the upper-middle crust of the southwestern and central sections of the profile, at depths of 5–20 km and 10–30 km, respectively. Thus, our study suggests that the northwest boundary of the Sichuan-Yunnan diamond block, contrary to previous studies that considered it a transitional boundary, is located at the Dedeng-Batang-Riyu fault. Here, the boundary is a high-resistivity barrier, electrically isolating the Qiangtang block in the southwest from the Sichuan-Yunnan block in the northeast. The two significant high-conductivity zones in the upper-middle crust appear within the block’s interior, contrasting with previous assumptions of lower crustal flow.

10.3389/feart.2024.1527559

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Mechanism for the Uplift of Gongga Shan in the Southeastern Tibetan Plateau Constrained by 3D Magnetotelluric Data

Geophysical Research Letters (2022)

Feng Jiang Xiaobin Chen Martyn Unsworth Juntao Cai Bing Han

Abstract Gongga Shan (GGS) is the highest mountain on the eastern margin of the Tibetan Plateau. However, the mechanism for the uplift of Gongga Shan is still unclear due to a lack of detailed geophysical studies. Inversion of an array of magnetotelluric data at 120 sites produced a 3D resistivity model that revealed that the GGS massif is characterized by a high resistivity upper crust underlain by a westward dipping resistor at middle crustal depths that is interpreted as the underthrust Yangtze Craton (YC). A thin conductive layer is sandwiched between these two zones of high resistivity. This resistivity model is inconsistent with previously published geodynamic models. Based on the new magnetotelluric results, we propose that the uplift of Gongga Shan occurs primarily by underthrusting of the YC. Additional uplift may be due to transpression on a restraining bend of the oblique‐slip Xianshuihe faults.

Magnetotellurics

Massif

10.1029/2021gl097394

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Electrical resistivity structures of the Kunlun–Qaidam–Qilian system at the northern Tibet and their tectonic implications

Physics of The Earth and Planetary Interiors (2016)

Qibin Xiao Guihang Shao Guo Yu Juntao Cai Jijun Wang

Magnetotellurics

10.1016/j.pepi.2016.03.011

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Advances in alternating electromagnetic field data processing for earthquake monitoring in China

Science China Earth Sciences (2014)

Guoze Zhao Yaxin Bi Lifeng Wang Bing Han Xiao Wang

Data Processing

SIGNAL (programming language)

10.1007/s11430-014-5012-3

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Citations (11)

Data for Tangshan earthquake zone

Zenodo (CERN European Organization for Nuclear Research) (2023)

Juntao Cai Xiaobin Chen

10.5281/zenodo.7958030

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Magnetotelluric evidence for the crustal deformation beneath the region around the Lijiang-Xiaojinhe fault, SE margin of the Tibetan Plateau

Journal of Asian Earth Sciences (2022)

Jiong Zhang Xiaobin Chen Juntao Cai Zhongyin Liu Zeyi Dong

Magnetotellurics

10.1016/j.jseaes.2022.105308

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A RAPID AND PRECISE INVERSION METHOD FOR THE DETERMINATION OF INTRINSIC COMPLEX-RESISTIVITY PARAMETERS

Chinese Journal of Engineering Geophysics (2005)

Juntao Cai

The difference of cole-cole parameters between polarized body and host rock is used to estimate polarized property of polarized body in complex-resistivity method.The basal work which must be settled in estimating polarized property of polarized body is to obtain intrinsic parameters from apparent spectrum in complex-resistivity method.A new inversion method for the determination of intrinsic IP parameters of multi-layered polarization earth is developed including complex-resistivity optimal inversion and recursive inversion. The inversion can be done only by measuring four various frequencies of complex-resitivity data.In order to check the validity of inversion result,we calculate cole-cole intrinsic parameters by this method in contrast with general inversion of the spectrum measured at one station and joint inversion of the spectra. We also inverse the same model with different initial parameter values.Inversion results show that quick calculation,steady convergence,little request for inversion starter and veracious results are the characteristics of this method.

Induced polarization

Inverse transform sampling

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Deep electrical structure of the Sulu orogen and neighboring areas

Science in China Series D Earth Sciences (2009)

Qibin Xiao Guoze Zhao Jijun Wang Yan Zhan Xiaobin Chen

Magnetotellurics

10.1007/s11430-009-0013-3

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A magnetotelluric study of 3D electrical resistivity structure underneath the southern segment of the Red River fault zone, South China

Journal of Asian Earth Sciences (2021)

Tao Ye Xiaobin Chen Zhongyin Liu Peijie Wang Zheyi Dong

Magnetotellurics

10.1016/j.jseaes.2021.105056

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Optimized volume models of earthquake-triggered landslides

Scientific Reports (2016)

Chong Xu Xiwei Xu Lingling Shen Qi Yao Xibin Tan

In this study, we proposed three optimized models for calculating the total volume of landslides triggered by the 2008 Wenchuan, China Mw 7.9 earthquake. First, we calculated the volume of each deposit of 1,415 landslides triggered by the quake based on pre- and post-quake DEMs in 20 m resolution. The samples were used to fit the conventional landslide "volume-area" power law relationship and the 3 optimized models we proposed, respectively. Two data fitting methods, i.e. log-transformed-based linear and original data-based nonlinear least square, were employed to the 4 models. Results show that original data-based nonlinear least square combining with an optimized model considering length, width, height, lithology, slope, peak ground acceleration, and slope aspect shows the best performance. This model was subsequently applied to the database of landslides triggered by the quake except for two largest ones with known volumes. It indicates that the total volume of the 196,007 landslides is about 1.2 × 10(10) m(3) in deposit materials and 1 × 10(10) m(3) in source areas, respectively. The result from the relationship of quake magnitude and entire landslide volume related to individual earthquake is much less than that from this study, which reminds us the necessity to update the power-law relationship.

Quake (natural phenomenon)

Lithology

10.1038/srep29797

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Citations (100)