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Abstract
Analytical results of sound velocity and spectrum for seafloor sediment ore obtained by VWA (velocity-wave-amplitude) discrimination technique. Based on velocity-wave-amplitude, an understanding is gained of the physical condition and structural characteristics of seafloor sediment, which is combined with other geological information of the sedimentary layer to synthetically discriminate the properties of seafloor sediment. Experimental results show that, by using the relationship between sound velocity, wave form envelope, amplitude shape and size, and such parameters as sedimentary structure, microstructure, bedding, grain composition, mineral composition, and physical-mechanics, etc., the basic properties of the shallow surface seafloor sediment in the experimental sea area can be discriminated and the burial depth of traces of ancient marine transgression and regression events in the borehole cores of seafloor sediment can be divided, thus making an attempt of and contribution to the practice of acoustically remote-sensing and telemetering seafloor sediment.
This experimental research is funded by the scientific projects (No. 40476020) of the China National Natural Science Foundation; It has been aided by our colleagues Research Scientist Zhou Zhiyu, Senior Engineer Liang Tianming and Engineer Feng Shiying, etc. in the bottom sampling and the scanning operation of the Model Klein shallow stratigraphic/100 kHz side-scanning sonar, as well as the Development Scientific Research Institute of China Offshore Oil Nanhai West Corp. in providing seafloor sediment cores for acoustic measurement and research. We hereby extend our deep thanks to them.