Qibin Xiao

Institute of Geology, China Earthquake Administration

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Ji Tang

China Earthquake Administration

Guoze Zhao

Institute of Geology, China Earthquake Administration

Yan Zhan

China Earthquake Administration

Lifeng Wang

Institute of Geology, China Earthquake Administration

Xiaobin Chen

Institute of Geology, China Earthquake Administration

Jijun Wang

Shanghai Mental Health Center

Guo Yu

Yangtze University

Bing Han

Institute of Geology, China Earthquake Administration

Jijun Wang

Center for Excellence in Brain Science and Intelligence Technology

Jihong Zhang

Inner Mongolia University of Science and Technology

Cooperative Institutions

China Earthquake Administration

Institute of Geology, China Earthquake Administration

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Institute of Geology and Geophysics

Institute of Tibetan Plateau Research

Czech Academy of Sciences, Institute of Geology

Center for Excellence in Tibetan Plateau Earth Sciences

Peking University

Ministry of Natural Resources

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Electrical resistivity structures northeast of the Eastern Kunlun Fault in the Northeastern Tibet: Tectonic implications

Tectonophysics (2013)

Qibin Xiao Jin Zhang Guoze Zhao Jijun Wang

Magnetotellurics

Thrust fault

10.1016/j.tecto.2013.05.003

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Citations (47)

Lateral Rheology Differences in the Lithosphere and Dynamics as Revealed by Magnetotelluric Imaging at the Northern Tibetan Plateau

Journal of Geophysical Research Solid Earth (2018)

Qibin Xiao Guo Yu Guihang Shao Man Li Jijun Wang

Abstract Differences in topography and surface deformation in the northern Tibetan Plateau may reflect variable rheology in the lithosphere. Whether middle to lower crustal flow exists below the region between the eastern Kunlun Shan range and the Qaidam Basin remains debated. We provide electrical resistivity images of three new magnetotelluric (MT) profiles across the Qiman Tagh and the western Qaidam Basin. The new models reveal low‐resistivity anomalies below the Qaidam Basin in the lower crust and generally high‐resistivity crust in the Qiman Tagh range. A low‐resistivity anomaly at the uppermost‐mantle level is imaged below the Qiman Tagh range in the profile close to the Altyn Tagh Fault. This anomaly is possibly connected with partial melting in the lower portion of the thickened Songpan‐Ganzi crust close to the southern end of the study area; the minimum requirements for the low‐resistivity anomaly below the Qiman Tagh are 0.05 wt% water content or 0.02 melt fraction, which may greatly decrease the effective viscosity in the uppermost‐mantle rocks and allow flowing. Consequently, we propose that the crustal flow is not mature below the Kunlun Shan range south of the Qaidam Basin because no continuous and stable low‐resistivity anomaly was imaged at this level. The uppermost‐mantle low‐resistivity anomaly below the Qiman Tagh is a passage that allows the continuous northward transfer of materials in the interior of the plateau. This low‐resistivity channel shallows northward and reaches the lower crust of the southwestern Qaidam Basin.

Magnetotellurics

10.1029/2017jb015285

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Citations (11)

ELECTRIC STRUCTURE OF THE CRUST BENEATH THE ORDOS FAULT BLOCK

Seismology and Geology (2010)

Qibin Xiao

The Ordos fault block is a stable block since the Cenozoic time.Whether low-resistivity layers exist in the middle and lower crust of this kind block is an open question.This work attempts to reveal the entire crustal structure of the Ordos fault block based on interpretation of magnetotelluric data collected along the profile across this region.The result shows that a layered structure characterizes the crust of the Ordos fault block,with a low-resistivity layer at depth of about 20km,presumably associated with fluids there.On contrast,in the areas of active tectonics in the east and west of the fault block,there is no such layered electric structure in crust,while the low-resistivity zones may be related with the detachments(or ductile-shear zones) in crust.The difference in electric structure of crust between the Ordos fault block and neighboring areas is of significance to the analysis of activity and deformation in varied blocks.

Magnetotellurics

Fault block

Source

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Citations (10)

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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Citations (22)

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)

Application of 2D magnetotelluric methods in a geological complex area, Xinjiang, China

Journal of Applied Geophysics (2011)

Qibin Xiao Xinping Cai Guanghe Liang X. Xu Baolin Zhang

Magnetotellurics

10.1016/j.jappgeo.2011.06.007

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Citations (15)

Structure and geometry of the Aksay restraining double bend along the Altyn Tagh Fault, northern Tibet, imaged using magnetotelluric method

Geophysical Research Letters (2017)

Qibin Xiao Guo Yu Jing Liu‐Zeng M. E. Oskin Guihang Shao

Abstract Large restraining bends along active strike‐slip faults locally enhance the accumulation of clamping tectonic normal stresses that may limit the size of major earthquakes. In such settings, uncertain fault geometry at depth limits understanding of how effectively a bend arrests earthquake ruptures. Here we demonstrate fault imaging within a major restraining bend along the Altyn Tagh Fault of western China using the magnetotelluric (MT) method. The new MT data were collected along two profiles across the Aksay restraining double bend, which is bounded by two subparallel strands of the Altyn Tagh Fault: Northern (NATF) and Southern (SATF). Both two‐dimensional (2‐D) and three‐dimensional (3‐D) inversion models show that the Aksay bend may be the center of a positive flower structure, imaged as a high‐resistivity body extending to an ~40 km depth and bounded by subvertical resistivity discontinuities corresponding to the NATF and SATF. In the western section of the Aksay bend, both the NATF and SATF show similar low‐resistivity structure, whereas in the eastern part of the bend, the low‐resistivity anomaly below the SATF is wider and more prominent than that below the NATF. This observation indicates that the SATF shear zone may be wider and host more fluid than the NATF, lending structural support to the contention that fault slip at depth is asymmetrically focused on the SATF, even though surface slip is focused on the NATF. A south dipping, low‐resistivity interface branching upward from the SATF toward the NATF indicates a fault link between these strands at depth.

Magnetotellurics

Classification of discontinuities

Hypocenter

10.1002/2017gl072581

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Citations (39)

Electromagnetic anomaly before earthquakes measured by electromagnetic experiments

Earthquake Science (2009)

Guoze Zhao Yan Zhan Lifeng Wang Jijun Wang Ji Tang

Epicenter

Anomaly (physics)

10.1007/s11589-009-0395-5

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Citations (22)

Application of the 3D magnetotelluric inversion code in a geologically complex area

Geophysical Prospecting (2010)

Qibin Xiao Xinping Cai X. Xu Guanghe Liang Baolin Zhang

ABSTRACT The WSINV3DMT code makes the implementation of 3D inversion of magnetotelluric data feasible using a single PC. Audio‐magnetotelluric data were collected along two profiles in a Cu‐Ni mining area in Xinjiang, China, where the apparent resistivity and phase curves, the phase tensors and the magnetic induction vectors indicate a complex 3D conductivity structure. 3D inversions were carried out to reveal the electrical structure of the area. The final 3D model is selected from the inversion results using different initial Lagrange values and steps. The relatively low root‐mean‐square (rms) misfit and model norm indicate a reliable electrical model. The final model includes four types of low resistivity areas, the first ones coincide with the known location of an orebody and further forward modelling indicates that they are not in full connectivity to form a low resistivity zone. The second ones are not controlled by magnetotelluric sites and embody little information of the observed data, they are considered as tedious structures. The third one is near to the regional Kangguer fault and should be treated carefully considering the effect of the fault. The last ones are isolated and existing at a limited level as the first ones, they should be paid more attention to.

Magnetotellurics

10.1111/j.1365-2478.2010.00896.x

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Citations (25)

Three-dimensional magnetotelluric inversion considering electrical anisotropy with synthetic and real data

Physics of The Earth and Planetary Interiors (2022)

Qibin Xiao Guo Yu Zeyi Dong Zelin Sun

Magnetotellurics

Principal axis theorem

10.1016/j.pepi.2022.106876

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Citations (9)