Guangzhou Marine Geological Survey

Haima Cold Seeps: Direct Evidence for the Occurrence of Gas Hydrates—A Case Study from the Qiongdongnan Sea Area, South China Sea

Cold seeps are natural “outcrop” evidence of marine gas hydrates and represent one of the most direct indicators of gas hydrate occurrence. This study used high-resolution 3D seismic data covering approximately 400 km2 in the deep-water southern Qiongdongnan Basin, northern South...

Shipboard core-storage platform for drillships: design, verification and field validation

For the pioneered shipboard automated core-transmission system (ACTS) on the ocean drillship Dream, the structural integrity and operational reliability of the storage rack subsystem are critical to core logistics efficiency. The shipboard subsystem module experiences pronounced...

Study on the accumulation mechanism of natural gas hydrate controlled by sandy reservoirs in the Qiongdongnan Basin

Abstract This study investigates the formation mechanism of natural gas hydrates in the deep-water Qiongdongnan Basin, with particular emphasis on the controlling role of sandy reservoirs in the hydrate accumulation system. On the basis of geological observations of sand bodies i...

A Core-Constrained, Scale-Matched Electroacoustic Fusion Method for Gas Hydrate Saturation Estimation: A Case Study of Well GMGS5-W08

Clay-surface conduction in fine-grained, weakly consolidated marine sediments, together with the scale mismatch between core and logging observations, often causes resistivity- and acoustic-based estimates of gas hydrate saturation to diverge. For Well GMGS5-W08, we develop a cor...

Integrating Grid-Based Random Forest Predictions with Slope Units for Landslide Susceptibility Mapping

Landslide susceptibility mapping identifies terrain prone to slope failure under comparable environmental and triggering conditions. Grid-based machine-learning outputs can be spatially fragmented and difficult to translate into slope-scale mitigation. We developed a two-stage gr...

Controls of Sediment Grain Size and Bedform Dynamics on Scour Variability in a Strait‐Influenced Tidal Delta

ABSTRACT Scour development around offshore monopiles in the Eastern Mouth Tidal Delta (EMTD) of the Qiongzhou Strait was investigated based on field observations of bathymetry, hydrodynamic conditions and sediment grain size. The results reveal pronounced spatial variability in s...

Equatorial Indian Ocean productivity over the last 200,000 years and links to deep circulation variations

Ocean circulation plays a key role in regulating atmospheric carbon dioxide levels during Pleistocene glacial-interglacial cycles. However, spatial responses of the oceans remain poorly constrained because reliable records from important carbon exchange regions, such as the equat...

Path-Dependent Diagenesis and Facies-Controlled Reservoir Quality in Lower Cretaceous Fan-Delta Sandstones, North Yellow Sea Basin: A Model for Superimposed Rift Basins

The Lower Cretaceous fan-delta sandstones in the North Yellow Sea Basin underwent a distinctive polyphase burial trajectory, offering a natural laboratory to investigate path-dependent diagenesis and its impact on reservoir quality evolution in superimposed rift basins. Integrati...