用声学三参数判别海底沉积物性质

通过用声速-波形-振幅三参数识别技术获得海底沉积物的声速和频谱分析结果,根据声速、波形、振幅认识海底沉积物物理状态和结构特征,结合沉积层的其他地质信息,综合来判别海底沉积物性质。实验结果表明:利用声速高低、波形包络、振幅形状大小与沉积物结构、微结构、层理、颗粒成分、矿物组成、物理力学参数之间的关系,可以判别实验海区浅表层海底沉积物基本性质和划分海底沉积物钻孔岩心中古海水进退事件痕迹的埋藏深度。为声遥感遥测海底沉积物的实践作出尝试和贡献。

Discrimination of seafloor sediment properties from sound velocity waveform and amplitude

Analytical results of sound velocity and spectrum for seafloor sediment are obtained by the three parameters(velocity-wave-amplitude) discrimination technique.Based on the three-parameter method,an understanding is gained of the physical condition and structural character-istics of seafloor sediment,which is combined with other geological information of the sedimen-tary 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 contributing to the practice of acoustic remote-sensing and telemetering seafloor sediment.