A5033552522- High-pressure geophysics and materials
- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Geomagnetism and Paleomagnetism Studies
- Geological and Geophysical Studies
- Seismic Waves and Analysis
- Earthquake Detection and Analysis
- Seismic Imaging and Inversion Techniques
- Seismology and Earthquake Studies
- Geochemistry and Geochronology of Asian Mineral Deposits
- Clay minerals and soil interactions
Chang'an University
2024
Northwest University
2021-2024
State Key Laboratory of Continental Dynamics
2021-2023
Center for High Pressure Science and Technology Advanced Research
2021-2022
China University of Geosciences
2022
The ongoing collision between Indian and Asian continents has created the Tibetan plateau. northeastern plateau (NE Tibet) long been a key region for studying its expansion mechanism. However, detailed lithospheric structures across tectonic boundaries bordering blocks have not fully imaged, which obscured understanding of how interacts with other blocks, like Ordos block. Therefore, about 227 stations less than 1-km intervals were deployed from 1st October 2024 one month, crossing NE Tibet,...
We present detailed 3-D tomographic images of P and S wave velocity (Vp, Vs), Poisson's ratio (ν) Vp azimuthal anisotropy the crust uppermost mantle beneath source area 21 May 2021 Maduo earthquake (M 7.4) in NE Tibetan plateau. The are obtained by inverting a large number arrival-time data 11,235 local earthquakes aftershocks recorded at 67 seismic stations. Our results show that mainshock occurred low-Vs high-ν anomaly, probably reflecting crustal fluids affected rupture nucleation. 40 km...
Abstract Subducted oceanic crust is enriched in free silica. Although being one of the silica polymorphs at lower‐mantle pressures, niccolite‐type phase (Nt‐phase) has not been documented multicomponent metabasaltic or metasediment compositions relevant to subducting crust. Here, we report formation an Al‐rich Nt‐phase (∼24.4 32.4 wt% Al 2 O 3 ), coexisting with Al‐depleted bridgmanite (∼6.4 7.6 δ‐phase, and iron‐rich model hydrated basalts over pressure‐temperature range 84–113 GPa...
Abstract The presence of water may contribute to compositional heterogeneities observed in the deep lower mantle. Mg-rich ferropericlase (Fp) (Mg,Fe)O rock-salt structure is second most abundant phase a pyrolitic mantle model. To constrain storage mantle, experiments on chemical reaction between and H2O were performed laser-heated diamond-anvil cell at 95–121 GPa 2000–2250 K, run products characterized combining situ synchrotron X-ray diffraction measurements with ex-situ analysis recovered...
Abstract Incorporation of water into mantle compositions can have significant effects on the phase relations in systems. In this study, we synthesized an iron‐rich hexagonal hydrous (referred to as “HH1‐phase”) under high pressure‐temperature ( P ‐ T ) conditions deep lower and determined crystal structure HH1‐phase at 79 GPa using multigrain crystallography method. The chemical formula obtained was Fe 12.76 O 18 H x ∼ 4.5) Fe‐O‐H system. To demonstrate role for storage multicomponent...
<p>Figs. S1–S33.</p>
<p>Figs. S1–S33.</p>
We determined a detailed 3-D model of P-wave anisotropic tomography the crust and upper mantle beneath Mendocino Triple Junction (northern California, USA) by using large number high-quality travel-time data local teleseismic events recorded dense seismic network on North American continent. Our results show presence slab window upwelling asthenosphere material through directly contacts surrounding plates. A high-velocity anomaly is revealed at depths ∼300−400 km triple junction, which...
Abstract Carbonatites are one of the major archives rare earth elements (REE), and their formation in some cases is linked to deep subduction melting REE-rich oceanic sediments. With a view investigate this model through high pressure experiments, we synthesized hexagonal hydroxyl carbonate, hydroxylbastnasite-(Sm) Sm(CO3)OH, using DS 6×600t cubic-anvil-apparatus under temperature conditions 3 GPa 1073.15K. The accurate crystal structure Sm(CO3)OH was determined single X-ray diffraction...
Abstract The lower mantle, containing both primordial and recycled water, is the most massive potential water reservoir in Earth. Geophysical geochemical evidence combined have suggested that largest heterogeneities deep mantle may serve as primitive deep-mantle reservoirs hosting a variety of incompatible species including hydrogen. To understand storage we conducted experiments Fe-O-H, Fe-Al-O-H Fe-Al-Mg-Si-O-H systems under high pressure-temperature (P-T) conditions, discovered previously...