A5071255343- Methane Hydrates and Related Phenomena
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- Geological formations and processes
- Hydraulic Fracturing and Reservoir Analysis
- Seismic Waves and Analysis
- Marine and environmental studies
- Geological Studies and Exploration
- Hydrology and Sediment Transport Processes
- Drilling and Well Engineering
- Geotechnical and Geomechanical Engineering
- Atmospheric and Environmental Gas Dynamics
- Geophysics and Gravity Measurements
GEOMAR Helmholtz Centre for Ocean Research Kiel
2019-2025
Institute of Earth Sciences, Academia Sinica
2020-2022
National Taiwan Ocean University
2021-2022
National Taiwan University
2019-2022
Abstract Turbidity currents carve Earth’s deepest canyons, form largest sediment deposits, and break seabed telecommunications cables. Directly measuring turbidity is notoriously challenging due to their destructive impact on instruments within path. This especially the case for canyon-flushing flows that can travel >1000 km at >5 m/s, whose dynamics are poorly understood. We deployed ocean-bottom seismometers safely outside currents, used emitted seismic signals remotely monitor...
Abstract The northern part of the South China Sea is characterized by widespread occurrence bottom simulating reflectors indicating presence marine gas hydrate. Because area covers both a tectonically inactive passive margin and termination subduction zone, influence tectonism on dynamics hydrate systems can be studied in this region. Geophysical data show that there are multiple thrust faults active while much fewer smaller exist margin. This tectonic difference matches with geophysical...
Abstract The Formosa Ridge cold seep is among the first documented active seeps on northern South China Sea passive margin slope. Although this system has been focus of scientific studies for decades, geological factors controlling gas release are not well understood due to a lack constraints subsurface structure and seepage history. Here, we use high‐resolution 3D seismic data image stratigraphic structural relationships associated with fluid expulsion, which provide spatio‐temporal hydrate...
Abstract Turbidity currents carve the deepest canyons on Earth, deposit its largest sediment accumulations, and break seabed telecommunication cables. Powerful canyon‐flushing turbidity sensors placed in their path, making them notoriously challenging to measure, thus poorly understood. This study provides first remote measurements of flows, using ocean‐bottom seismographs located outside flow's destructive revolutionizing flow monitoring. We recorded internal dynamics longest flows yet...
Abstract Large amounts of methane, a potent greenhouse gas, are stored in hydrates beneath the seafloor. Sea level changes can trigger massive methane release into ocean. It is not clear, however, whether surficial seafloor processes cause comparable discharge. Previously, fluid migration was difficult to study due lack spatially dense seismic and thermal observations. Here we examine gas hydrate site at Four‐Way‐Closure Ridge off SW Taiwan using high‐resolution 3‐D cube, together with...
Seafloor sediment flows (turbidity currents) form some of the largest accumulations on Earth, carry globally significant volumes organic carbon, and can damage critical seafloor infrastructure. These fast destructive events are notoriously challenging to measure in action, as they often any instruments anchored within flow. We present first direct evidence that turbidity currents generate seismic signals which be remotely sensed (~1-3 km away), revealing internal structure remarkably...
Abstract Estimates of the sub‐seabed fluid flow rates are important for understanding hydrological budgets, biogeochemical cycles, and physical properties sediments. Fluid directions, however, difficult to measure, particularly beneath seafloor. We developed a rapid method estimate regional migration using an extensive database seismic reflection profiles taken offshore SW Taiwan. observe bottom‐simulating reflector (BSR) that deflects toward seafloor near thrust faults indicate localized...
Abstract Characterizing properties of marine subsurface sediment helps with siting for offshore infrastructure. Shear‐wave velocity ( V s ) provides information on the geotechnical seabed. We present our initial efforts to obtain a detailed two‐dimensional model large‐offset multi‐channel seismic (MCS) transect collected in shallow waters across Taiwan Strait using surface waves excited by large volume airgun. derived dispersion curves Scholte along 37.5‐km‐long phase‐shift method and then...