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THE CHARACTERISTICS ANALYSIS OF SEA BOTTOM DEPOSIT IN LINGDINGYANG BAY OF THE PEARL RIVER ESTUARY
Author(s): XIA Zhen, MA Sheng-zhong, LIANG Kai, SHI Yao-hong
Pages: 7-
13
Year: 2008
Issue:
2
Journal: MARINE GEOLOGY & QUATERNARY GEOLOGY
Keyword: 海底沉积; 特征分析; 伶仃洋;
Abstract: 在前人工作的基础上,利用2003-2005年广州海洋地质调查局1∶10万<珠江三角洲近岸海洋地质环境与地质灾害调查>项目的实测资料,综合分析了伶仃洋海底的沉积特征,认为伶仃洋表层沉积物类型有:砂、黏土质砂、砂-粉砂-黏土、砂质黏土、黏土质粉砂、粉砂质黏土等6种类型.伶仃洋晚更新世以来的海底地层主要有两套:层A为全新世冰后期海侵以来逐渐堆积而成的沉积物,钻孔揭示的沉积物类型主要为黏土质砂和砂-粉砂-粉砂质黏土;层B为一套晚更新世的黏土质粉砂、细砂-粗砂(含砾)、粉砂质黏土-黏土,以陆相沉积和剥蚀为主,局部为海陆交互相沉积,其下地层则为基岩风化物和基岩.
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