The investigation on the content of gold in recent submarine poly metallic massive sulfides and land-based massive base sulfide deposits demonstra te that the submarine sedimentary-exhalation not only causes accumulations of p olymetallic massive sulfides, but also results in obviously enrichment of gold.

Production technique and methods of the seabed sediment thematic digital map;

Because of the complexity of sea s environment and the difficulty to gain data,the sea three-dimensional visual research always concentrates on the sea scene and the seabed terrain aspect,and the related visual research of seabed sediment should be strengthened.

It takes the sea-floor spreading,oceanic crust subduction,and transform fault as main active forms and mantle convection as an original dynamic.

Numerical Simulations of Marine Sediment Movement Affected by Water Waves;