【摘要】 选取前湖湾的海岸剖面以及海岸、海滩两个钻孔作为代表剖面,探索闽南沿海晚第四纪环境演变的规律,对剖面、钻孔岩芯进行10cm的等间距采样.选取当地海岸的风砂、海滩、河流沉积物作为环境判别的参考,使用激光粒度仪进行粒度测试.研究表明:(1)42kaB.P.以来前湖湾经历了海滩、河口河流、湖沼、海滩环境,再转为沙丘砂堆积环境的变迁;(2)古树林因42kaB.P.海面上涨被海滩沉积物所覆盖.更多还原

【Abstract】 This paper chose the continuous profile of Qianhu Bay and two drilling holes on the beach and near the coastal area as typical profiles in Zhangpu. To discover the evolutionary regularity of the local environment in the coastal area of South Fujian during the Late Quaternary,the writers have prepared 10 cm-equal geologi-cally spaced samplings from the profile,and 10 cm-equally spaced samplings in the drilling holes. They have selected the eolian sand deposits and beach,fluvial deposits as reference to identify the sedimentary environ-ment in the area. And accomplished the test to the grain size. Finally,a conclusion is drawn that the environment of Qianhuy Bay is likely to have experienced a beach environment,an estuary-river environment,a lake environment,a beach environment and a modern coastal sand-dune environment since 42kaB.P.. Moreover,the primeval forest along the coast has been immersed by the beach sediments for the sea-level elevation since 42kaB.P..更多还原