A5041572909- earthquake and tectonic studies
- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Methane Hydrates and Related Phenomena
- Earthquake Detection and Analysis
- Underwater Acoustics Research
- Seismology and Earthquake Studies
- Geophysics and Gravity Measurements
- Machine Fault Diagnosis Techniques
- Fault Detection and Control Systems
- Geology and Paleoclimatology Research
Institute of Oceanology
2014-2024
Chinese Academy of Sciences
2014-2024
Qingdao National Laboratory for Marine Science and Technology
2016-2024
Laoshan Laboratory
2023-2024
Institute of Oceanology
2023
Tohoku University
2018
Abstract Seismic anisotropy could provide vital information about the evolution and internal convection of deep Earth interior. Although previous seismological studies have revealed a wide distribution seismic in upper portion lower mantle beneath many subduction zones, existence at these depths away from subducted slabs remains debated. Here we use P-wave azimuthal tomography to image crust down 1,600-km depth. We find prominent anisotropic patterns Philippine Sea Plate. Substantial with...
Abstract We determined P‐wave tomographic images by inverting a large number of arrival‐time data from 2749 local earthquakes and 1462 teleseismic events, which are used to depict the three‐dimensional morphology subducted Eurasian Plate along northern segment Manila Trench. Dramatic changes in dip angle revealed north south, being consistent with partial subduction buoyant plateau beneath Luzon Arc. Slab tears may exist edges within plate induced subduction, lithosphere be absent at depths...
Abstract A high‐resolution model of three‐dimensional P wave tomography the crust and upper mantle beneath southern part Philippine Trench is determined by inverting 22,960 arrival times 2,789 local earthquakes 4,660 traveltime residuals 751 teleseismic events simultaneously. The tomographic method TOMOG3D used to obtain that has a lateral resolution 0.6° or better, as shown extensive checkerboard tests. model‐recovery synthetic test also performed, which indicates main features our images...
Abstract Collision of oceanic plateaus with trenches has played a key role in the continental growth and plate tectonic reorganizations throughout Earth's history. However, understanding collision between an initially rifted plateau trench is still deficient. Here we conduct first seismic tomography receiver function analyses Yap subduction zone, western Pacific Ocean, where Caroline Plateau colliding Trench. Our results reveal horizontal overturned slabs south north Sorol Trough,...
Abstract We obtain three‐dimensional models of crustal shear‐wave velocity and radial anisotropy in the Bohai Bay basin (BBB), revealing distinct patterns. The western region exhibits pronounced positive anisotropies, attributed to upper mantle convection driven by subduction Pacific plate during early Tertiary. Conversely, eastern demonstrates weak negative indicating a compression shear rupture system influenced far‐field India‐Eurasian collision Neogene‐Quaternary. These differences...
A tomographic travel-time inversion has been applied to trace the subducted slab of South China Sea (SCS) beneath Manila Trench. The dataset, taken from International Seismological Centre (1960–2008), is composed 13,087 P-wave arrival times 1401 regional earthquakes and 8834 1350 teleseismic events. results image different morphology SCS as a high-velocity zone. subducting angle varies along trench: at 16° N 16.5° N, dips low (24° ~ 32°) for 20–250 km depth moderate (50°) ~250–400 depth. At...
Abstract The Yap subduction zone is a distinctive erosive margin with an extremely slow convergence rate. high relief of the subducting plate, generated by horst and graben structures seamounts, leads to attenuation crust. In this study, we present latest geophysical data, collected Chinese research vessel Kexue , investigate erosion at develop models for structures. We show anomalous distance between Trench adjacent volcanic arc, steep slope trench arcward, frontal prism, rare sediment in...
Abstract Taiwan is considered to be created by interactions between the Manila and Ryukyu subduction zones, which form a normal double‐slab system. Because of two opposite dipping subductions Eurasian Plate (EP) Philippine Sea (PSP) around Taiwan, polarity reversal beneath northern presumed, accounted for slab breakoff model. However, this model has not been convincingly supported tomographic results so far. Moreover, details dynamic process deformation in system are still unclear. In work,...
ABSTRACT It has long been established that plastic flow in the asthenosphere interacts constantly with overlying lithosphere and plays a pivotal role controlling occurrence of geohazards such as earthquakes volcanic eruptions. Unfortunately, accurately characterizing direction lateral extents mantle field is notoriously difficult, especially oceanic areas where deployment ocean bottom seismometers (OBSs) expensive thus rare. In this study, by applying shear wave splitting analyses to dataset...
We construct a complete density transection based on the velocity structures across Zhongsha Bank in South China Sea. Gravity modelling of lateral contrasts between tectonic units helps us to determine structural attributes and boundaries continental blocks deep basins. The configuration continent–ocean boundary (COB) around is mapped gravity/magnetic anomaly crustal structures. A low-density mantle found beneath oceanic basins, this associated with high heat-flow background. COB orientation...
SUMMARY The orientation of an ocean-bottom-seismometer (OBS) is a critical parameter for analysing three-component seismograms, but it difficult to estimate because the uncontrollable OBS posture after its deployment. In this study, we develop new and effective method by fitting amplitude direct P wave teleseismic receiver functions. reliability verified using synthetic data observed waveforms recorded at land seismic stations in Shandong Province, China. Our extensive tests show that our...
Abstract Formation and evolution of the Philippine Sea Plate (PSP) are still highly debated, mainly because PSP has been surrounded by subduction zones since its inception. Therefore, it is vital to determine a new tomographic model with higher resolution precisely portray subducted slabs beneath around PSP, in particular, Pacific slab that played an essential role formation evolution. In this study, updated obtained inverting large number P‐wave arrival times local regional earthquakes PSP....
The construction model of the Caroline Ridge uppermost basement is still unresolved, requiring more inference from limited geophysical observational data. Here, we systematically reveal intrabasement seismic reflectors volcanic sequences within rifted and subsidence domains Ridge. Extrusive centres three types reflectors, that is, relatively horizontal, ridgeward‐dipping folded have been identified. in domain are characterized by domal shapes produce sub‐parallel stratified conduits connect...
The South China Sea (SCS) located at the intersection of three intercontinental plates Eurasia, IndiaAustralia, and Pacific Oceanis, is a typical marginal sea basin formed by seafloor spreading under tectonic background plate convergence. Many crustal-scale studies indicate that SCS has undergone asymmetric spreading, multi-phase ridge jumps, intense post-spreading volcanic activity. Due to lack seismic data in oceanic SCS, it remainsunclear about scale control Zhongnan fault, magma source...
The Philippine Sea Plate (PSP) is the largest trench-arc-basin system in Western Pacific, which completely surrounded by convergent boundaries and characterized a complex evolution of back-arc systems marginal basins involving lithospheric processes. azimuthally anisotropy structure can be employed to reflect deformation histories lithosphere mantle help us reveal influencing factors formation especially West Basin (WPB). However, seismic anisotropic velocity structures have not been...
Abstract Interaction of oceanic plateaus with trenches plays a vital role in subduction activities and tectonic evolutions. The Yap trench is rare case an plateau system. However, the knowledge impacts plateau-trench interaction on activity still insufficient, due to lack seismological observations. Using ocean-bottom seismometer data near from April 2016 May 2017, we conduct seismicity analyses zone by utilizing machine-learning algorithm matched-filter detections. pattern exhibits...