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近年在南海东部80~1500 m水深区进行了许多场址的工程物探调查项目,基于对这些项目侧扫声呐地貌资料的解释和研究,本文对研究区内的几种典型地貌特征进行了梳理和分析.研究区内海底地貌特征分布广泛、种类众多,其中常见的底质异常、沙波、海底光缆、硬质海底、崎岖地形与滑坡、断层等是研究区内具有代表性的典型地貌特征.本文目的是通过研究不同区块、不同类型的地貌特征,提高对海底地貌特征的认识,分析其对于海底工程活动可能存在的潜在危害和影响,有效提升地貌资料研究评价的准确性和可靠性,为以后在类似区域进行海底灾害地质研究提供参考和借鉴.
In recent years, many geophysical prospecting projects have been carried out at many sites in the depth of 80 ~ 1500 m in the eastern South China Sea. Based on the interpretation and study of these projects’ side-scan sonar landform data, several typical landform features in the study area were reviewed and discussed. The characteristics of seafloor geomorphology in the study area are widely distributed and varied in variety. Among them, the common anomalous sediment, sand wave, submarine cable, hard seafloor, rugged terrain, landslide and fault are the representative typical landform features in the study area. The purpose of this paper is to improve the understanding of the characteristics of the seafloor topography by studying the features of different blocks and different types of landforms and to analyze the potential hazards and impacts they may have on the seafloor engineering activities so as to effectively improve the accuracy and reliability of landform data research and evaluation, It will provide reference and reference for future researches on seabed disaster geology in similar areas.