摘要
通过对胶东半岛套子湾底质表层沉积物中元素地球化学及粒度特点进行分析,发现因为气候原因,Al2O3、SO3、K2O、MgO、SiO2、P2O5、TiO2、Sr不易流失而保存在沉积物中,使它们在湾底沉积物中的含量略高于中国浅海沉积物中的含量;而Cu、Rb、Pb、As、Zn的含量远高于中国浅海沉积物中的含量,与人类排入套子湾的各类污水有关;Ba的含量也较高,主要是因为胶东半岛和辽东半岛提供大量含Ba的载体在套子湾沉积的缘故;多数元素在近岸河流入海口处的含量为最高或接近最高,港口和近岸河流排污对此有很大贡献。CaO、Na2O在底质沉积物中表现出往海的方向,CaO的含量升高,Na2O的含量降低,与其在海水和淡水中的不同性质有关。除此以外,分析还表明,元素含量分布还受湾底水动力的影响。
From the analysis of elements and grain sizes of surface sediments in Taozi Bay of Jiaodong Peninsula, contents of Al_ 2O_ 3, SO_ 3, K_ 2O, MgO, SiO_ 2, P_ 2O_ 5, TiO_ 2, and Sr in are slightly higher than those in the shallow sea areas of China, due to influence of the local climate. Contents of Cu, Rb, Pb, As, and Zn are much higher than those of the shallow seas of China, due to wastewater input by human activity. Ba is higher because of the local geological background. Most elements are close to their highest values near the outlets of rivers, due to input of wastewater. Changes in CaO and Na_ 2O result from their different characters in seawater and freshwater. Besides, elements are also affected by bottom hydrodynamics of the Bay.
出处
《海洋地质动态》
2006年第11期1-6,共6页
Marine Geology Letters
基金
南京大学海洋地质重点学科支持项目(胶东半岛典型海湾沉积记录的环境变化)
南京大学人才引进启动经费支持项目(近岸带不同类型沉积物环境沉积学研究)
关键词
元素地球化学
环境意义
现代沉积物
套子湾
胶东半岛
geochemical characteristics
environmental significance
modern sediment
Taozi Bay
Jiaodong Peninsula
