A5103247739- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Crystallography and molecular interactions
- Geological and Geochemical Analysis
- Geomagnetism and Paleomagnetism Studies
- earthquake and tectonic studies
- Geophysical and Geoelectrical Methods
- Geochemistry and Geologic Mapping
- Geological and Geophysical Studies
- Geophysical Methods and Applications
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Seismology and Earthquake Studies
- Underwater Acoustics Research
- High-pressure geophysics and materials
- Advanced Thermoelectric Materials and Devices
- Geochemistry and Elemental Analysis
- Marine and environmental studies
- Gas Sensing Nanomaterials and Sensors
- Geological formations and processes
- Earthquake Detection and Analysis
- Transition Metal Oxide Nanomaterials
- Geoscience and Mining Technology
- Engineering and Test Systems
- Seismic Waves and Analysis
Second Institute of Oceanography
2013-2025
Ministry of Natural Resources
2014-2025
Chengdu University of Technology
2018
China XD Group (China)
2018
Jilin Province Science and Technology Department
2015-2016
Jilin University
2015-2016
National Central University
2015
Detachment faults (DF) and non-transform discontinuities (NTD) usually couple together in the same segment, but how they interact is unclear. Here, we report high-precision geomorphologic magnetic data collected by autonomous underwater vehicles over inter-coupled DFs NTDs along southwest Indian ridge, recognize analyze their structures to investigate interaction. The results show that large scale mass wasting, resulting from gravitational collapse on continuously raised detachment footwall...
Magmatic and tectonic processes can contribute to discontinuous crustal accretion play an important role in hydrothermal circulation at ultraslow-spreading ridges, however, it is difficult accurately describe the without age framework constrain evolution. Here we report on a multi-scale magnetic survey that provides constraints fine-scale evolution of detachment faulting system hosts activity 49.7°E Southwest Indian Ridge. Reconstruction multi-stage history shows previous episode took place...
Abstract Oceanic core complexes (OCCs) and detachment faults play a key role in crustal accretion at slow ultraslow spreading centers. We investigated the effect of different magma supply three OCCs Southwest Indian Ridge using high-resolution deep-sea bathymetric magnetic data. The average equivalent thickness extrusive basalt deduced from anomalies, proxy for supply, decreases west to east, Yuhuang (49.25°E) Longqi (49.65°E) Junhui (51.75°E) OCCs. Conversely, serpentinite outcrops become...
Seafloor massive sulfide (SMS) deposits contain abundant metals, such as Cu, Zn, Au, and Ag, which are of growing economic interest. Currently, the exploration SMS has entered into a new stage resource assessment, so we need geophysical method to rapidly obtain 3D structure these deposits. We report here self-potential (SP) survey performed with an autonomous underwater vehicle (AUV) at Yuhuang hydrothermal field on ultraslow-spreading Southwest Indian Ridge water depth ranging from 1300 m...
Abstract Hydrothermal alteration at high‐temperature vents near mid‐ocean ridge is thought to produce pervasive magnetization lows on basaltic ocean crust, but the detailed process insufficiently documented. Here, we performed microscopic and magnetic analyses a large set of hydrothermal‐related samples from Southwest Indian Ridge. Fresh basalts were chloritized brecciated during hydrothermal alteration, where titanomagnetite nanoparticle clusters hosted in interstitial glasses dissolved...
Abstract Titanomagnetites in mid‐ocean ridge basalt (MORB) experience variable post crystallization alterations associated with seafloor tectonic and environmental processes. Compared to low‐temperature oxidation, hydrothermal alteration is thought be more destructive but its magnetic aftermaths are insufficiently documented. Here we present comprehensive rock electron microscopic analyses of fresh hydrothermally‐altered MORBs dredged from the Longqi Yuhuang fields, Southwest Indian Ridge....
Abstract The outcrops of ultramafic rock along mid‐ocean ridges experience variable extents serpentinization related to tectonic and hydrothermal processes. It involves the water‐assisted alteration primary ferromagnesian minerals (e.g., olivine pyroxenes) produce secondary including serpentine, magnetite brucite. This hydration process induces profound changes in both rheological petrophysical properties ocean lithosphere. That said, evolution low‐frequency electrical polarization these...
Abstract Detachment faults at slow‐ and ultraslow‐spreading mid‐ocean ridges are essential for lithosphere‐hydrosphere interactions. However, their coupling with subseafloor hydrothermal circulation is poorly understood. Here, we investigated shallow fluid circulations in the active Dragon Horn detachment fault system of Southwest Indian Ridge using combined near‐bottom magnetic anomaly data rock analyses. We observed enhanced anomalies related to high magnetization basaltic country rocks...
Abstract. Marine self-potential (SP) investigation is an effective method to study deep-sea hydrothermal vents and seafloor sulfide deposits. At present, one of the commonly used marine systems a towed array electrodes. Large noises are recorded when great changes in electrode distance attitude occur due complex topography. In this paper, new multicomponent electrical field observation system based on autonomous underwater vehicle (AUV) was introduced for measurement signals. The tested...
Near-bottom magnetic prospecting is considered to be an efficient method for investigating inactive hydrothermal areas and the study of spatial structure systems. Furthermore, geophysical forward modeling widely used simulate anomalous characteristics geological bodies. To understand features sulfide deposits at mid-ocean ridges, we built 3D models both mafic- ultramafic-hosted near-bottom field. Our results showed a low amplitude anomaly above mafic-hosted deposits, high deposits. These...
The induced polarization (IP) method plays an important role in the detection of seafloor polymetallic sulfide deposits. Numerical simulations based on Poisson–Nernst–Planck equation and Maxwell were performed. effects mineralized structures IP electrical conductivity properties sulfide-bearing rocks investigated. results show that total chargeability increases linearly as volume content disseminated metal sulfides when is below 20%. However, nonlinearly with increasing vein massive 30%....
Rock types of basement determine the magnetic signature hydrothermal fields. Low magnetization zone (LMZ) is commonly observed at basalt-hosted fields due to fluid-rock interaction destroying minerals inside basalt. We here report a near-seafloor survey conducted by Autonomous Underwater Vehicle (AUV) over field on East Pacific Rise (EPR). Inversed and Reduced-To-the-Pole (RTP) anomaly both show negative reduced centered field, reflecting enhanced demagnetization alteration process....
Abstract Seafloor massive sulfide (SMS) deposits in different geological settings can have variable magnetic mineralogy, but the mechanism and implications of their spatiotemporal diversity are poorly understood. Based on seabed shallow drilling surficial sampling Yuhuang hydrothermal field, Southwest Indian Ridge, we investigate here whether ubiquitous oxidative weathering affects properties SMS deposits. Microscopic observation ferrous iron concentrations reveal that seafloor extensively...
Spherical phosphors of (Lu 1-x Tb x ) 3 Al 5 O 12 [(Lu )AG] have been obtained through homogeneous precipitation method using urea as the precipitant and rare earth nitrate mother salts. The synthesis, phase evolution photoluminescent properties )AG were tested by XRD, FE-SEM, PLE/PL, fluorescence decay analysis. pure garnets formed at 1100 °C or higher temperatures. exhibited strong green emissions ~545 nm (the D 4 → 7 F transitions 3+ under ~276 excitation. CIE chromaticity coordinates...
A topographical investigation of modern deposits the Baiyanghe fan in Xinjiang show that two types fluvial channels are developed on surface fan:intermittent and ephemeral channels. The latter, which have flow occupancy between < 50% zero, mainly formed by occasional flooding during summer rains. rate intermittent channel is about 50%, their output perennial main intermittent, occupying 2.1% area. Its coarse-grained gravels, highly rounded, well sorted, with low mud content higher imbricated...