A5075272919- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Geological and Geochemical Analysis
- Atmospheric and Environmental Gas Dynamics
- Geochemistry and Geologic Mapping
- CO2 Sequestration and Geologic Interactions
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Spacecraft and Cryogenic Technologies
- earthquake and tectonic studies
- Arctic and Antarctic ice dynamics
- Geomagnetism and Paleomagnetism Studies
- Clay minerals and soil interactions
- High-pressure geophysics and materials
- Astro and Planetary Science
- Solid-state spectroscopy and crystallography
- Hydraulic Fracturing and Reservoir Analysis
- Zeolite Catalysis and Synthesis
- Petroleum Processing and Analysis
- Cultural Heritage Materials Analysis
- Origins and Evolution of Life
- Geology and Paleoclimatology Research
- Crystal Structures and Properties
- Inorganic Chemistry and Materials
- Maritime and Coastal Archaeology
Qingdao Institute of Marine Geology
2018-2024
Ministry of Natural Resources
2018-2024
China Geological Survey
2021-2024
Qingdao National Laboratory for Marine Science and Technology
2018-2024
Laoshan Laboratory
2023
University of Hong Kong
2011-2018
Sun Yat-sen University
2016-2018
Guangzhou Institute of Geochemistry
2010-2016
Chinese Academy of Sciences
2010-2016
Guangzhou Marine Geological Survey
2016
Abstract In this study, a nano‐focus X‐ray computed tomography (X‐CT) is used to observe the formation of methane hydrate in sands on pore scale and quantify saturation, structure parameters, permeability hydrate‐bearing sands. A new analytical technique developed improve identification water‐hydrate boundary. Three accumulation habits (i.e., floating, contacting, cementing) spaces are observed. When there no bubble, distribution evolves from floating contacting then cementing as saturation...
Qinling ore belt is the largest known molybdenum in world with a total reserve of >5 Mt Mo metal. Based on geochemical behaviour Mo, structural settings orogenic belt, and geological events eastern China, we propose that tectonic are critical importance to formation these deposits. Molybdenum very rare earth an abundance ∼0.8 ppm continental crust. Both surface- magmatic-hydrothermal enrichment processes required for mineralization. It can be easily oxidized form water-soluble MoO4 – surface...
Nearly half of the world's Mo resources are hosted in Cenozoic porphyries along east Pacific margin. In contrast, there essentially no large porphyry deposits west Pacific. We propose that this uneven distribution is mainly due to Oceanic Anoxic Events (OAEs) and different subduction regimes eastern western margins. Molybdenum rare Earth, with an abundance 50 ppb primitive mantle, 0.8 ppm continental crust. Pre-enrichment needed for such a moderately incompatible element form deposits. The...
This paper provides an overview of the developments in analytical and testing methods experimental simulations on gas hydrate China. In laboratory, analyses experiments can provide useful parameters for exploration exploitation. recent years, modern instruments techniques, including Laser Raman spectroscopy (Raman), X-ray diffraction (XRD), computed tomography (X-CT), scanning electron microscope (SEM), nuclear magnetic resonance (NMR) high pressure differential calorimetry (DSC), were...
Bauxite deposits are studied because of their economic value and they play an important role in the study paleoclimate paleogeography continents. They provide a rare record weathering evolution continental surfaces. Geomicrobiological analysis makes it possible to verify that microorganisms have played critical during formation bauxite with possibility already intimated previous studies. Ambient temperature, abundance water, organic carbon bioavailable iron other metal substrates suitable...
Molecular dynamics (MD) simulations were performed to determine the three-phase coexistence line of sI methane hydrates. The MD carried out at four different pressures (4, 10, 40, and 100 MPa) by using direct phase method. In current simulations, water was described either TIP4P/Ice or "optimal" point charge (OPC) models as a simple Lennard-Jones interaction site. Lorentz-Berthelot (LB) combining rules used calculate parameters cross interactions. For OPC model, positive deviations from...
The impact of sensible heat on the gas production from different hydrate-bearing sediments is only partially understood, and whether it will affect performance burial hydrates remains unknown. In this study, we proposed a dynamic composite calculation method that incorporates in situ hydrate unrecovered water. Furthermore, water-hydrate-gas saturation was introduced, which considered dissolved methane water phase. Five layers, ranging depth 570 to 856 m, were synthesized with similar for...
The Qilian Mountain permafrost area located in the northern of Qinghai-Tibet Plateau is a favorable place for natural gas hydrate formation and enrichment, due to its well-developed fractures abundant sources. Understanding distribution multi-component hydrates crucial accurately evaluating reservoir resources this area. experiments were carried out using core samples drilled from hydrate-bearing sediments with similar composition characteristics observed <em>in situ</em> by X-ray Computed...
The three-phase coexistence line of the CO2 hydrate was determined using molecular dynamics (MD) simulations. By classical and modified Lorentz-Berthelot (LB) parameters, simulations were carried out at 10 different pressures from 3 to 500 MPa. For OPC water model, with classic LB parameters both showed negative deviations experimental values. TIP4P/Ice good agreement equilibrium data can be achieved when parameter is adjusted based on solubility in water. Our results also show that...
"Nanhai I" shipwreck of China Southern Song Dynasty is the oldest and most integrally preserved in world. The related conservation archeological research have caught great attention different experts all over In this study, types concretion covered on surface ceramics were analyzed by X-ray diffractometer, micro-Raman spectrometer, scanning electron microscope equipped with energy dispersive spectroscopy. Based analyses, we found that grey was mainly composed quartz, aragonite, calcite while...
Abstract Batch experiments of komatiite–H 2 O–CO system with temperatures from 200 to 450°C were performed simulate the interactions between newly formed ultramafic crust and proto-atmosphere on Earth before formation its earliest ocean. Particularly, magnetite nanocrystals observed in experiment carried out at that are characterized by their hexagonal platelet-like morphology porous structure. Exactly same set lattice fringes two opposite sides one pore suggests post-crystallization...
CH4/CO2 replacement is of great significance for the exploitation natural gas hydrate resources and CO2 storage. The feasibility this method relies on our understanding efficiency mechanism. In study, experiments were carried out to study distribution characteristics CH4 in hydrate-bearing sediments during after replacement. Similar previously reported data, also implied that process could be divided into two stages: fast reaction slow reaction, representing hydrate-gas interface...