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闽江口南支河道的演变与沉积环境

Abstract

本文是在大面积调查闽江口梅花港海区并采取大量沉积物样品 的基础上,通过室内粒度分析、重矿物鉴定分析、石英颗粒表面结 构分析、微体生物分析、卫星照片分析及新旧海图对比分析、浅层 剖面仪探测等手段,探讨了梅花港现代河口湾的发展和沉积环境、 入海泥沙扩散规律及梅花港的衰退原因。 研究结果表明:闽江现代河口湾是冰后期海水侵入闽江河谷而 形成的。河流来沙是河口分流河道,河口沙坝、浅滩、潮流通道, 潮坪潮脊等沉积环境的主要物源,在海洋动力的作用下,E119°43′ 以西的河口海区,大于0.063mm的底沙重新起动,向南搬运 并在长乐东北岸登陆成为风沙,在E119°43′以东海区,沉积...The evolution and sedimentary environment of south branch of Min Jiang River Estuary Based on the wide-ranging investigation in Min Jiang River Estuary and a large number of sedimen samples getted in Mei-hua Gang Sea area, and with the means of grain size, mineral, microbiology, satellite photes analyses, comparison of the sea charts and observation by Kelin Sonar Profiler, the paper discusses th...学位:理学硕士院系专业:海洋与环境学院海洋学系_海洋化学学号:xy00017

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