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对海南岛海岸沙丘岩的沉积结构与构造进行了实地调查和实验分析。研究表明,海岸沙丘岩的沉积构造和结构特征有别于其他海岸沉积类型,既有风成特征,也有成岩作用特征。海岸沙丘岩的形成需要具备物源、气候和水分3个条件,并经历初始沉积物堆积、初步胶结和溶解—沉淀3个形成阶段。海岸沙丘岩具有一定的环境指示意义,即海岸沙丘岩形成于冰后期的相对高海面时期,能指示风力较弱、沙丘固定和湿热的气候条件。近1 000多年来,研究区的季风风向与现代盛行风风向基本一致。
The sedimentary structure and structure of the dune rock on the coast of Hainan Island were investigated and analyzed experimentally. The study shows that the sedimentary structure and structural characteristics of the coastal dune rock are different from those of other coastal sedimentary types, both of which have the characteristics of aeolian and diagenetic. The formation of coastal dune rocks requires three conditions of provenance, climate and moisture, and undergoes three stages of initial sediment accumulation, initial cementation and dissolution-sedimentation. Coastal dune rock has some environmental significance, that is, the coastal dune rock formed in the relatively high sea level during the late ice period, indicating the climatic conditions of weak wind, dune fixation and dampness. Nearly 1,000 years, the study area of the monsoon wind direction and the prevailing prevailing wind direction basically the same.