大亚湾表层沉积物镁铝含量比变化及影响因素  

Changes and influencing factors of magnestum and aluminium content ratio of surface sediments in Daya Bay

作　　者：张士三[1] 陈承惠[1] 黄衍宽[1] 曾石 

机构地区：[1]国家海洋局第三海洋研究所,厦门361005

出　　处：《台湾海峡》1991年第3期245-251,共7页Journal of Oceanography In Taiwan Strait

摘　　要：本文讨论了大亚湾沉积物镁铝含量比——m值的分布、季节变化及m值与水介质的关系,结果证实,水介质的盐度、pH和水温是m值的主要影响因素,且水介质的盐度是决定m值大小的最基本要素。当3个影响因素呈同向变化时,对m值的变化具有叠加作用,m值的变化幅度较大;当盐度与pH呈相反方向变化时,若△pH>0.06,可对m值产生明显的影响,m值的变化与pH同向。从大亚湾沉积物m值随季节变化的特征表明,m值对沉积环境中水介质变化的反应是灵敏的。这一结果显示了m值对水介质变化能够响应的灵敏度。The planar distribution and seasonal changes of the magnesium and aluminium content ratio(e. g. m value) in the Daya Bay sediments and its relation to water medium are discussed. The results confirm that the salinity, pH and temperature of water medium are the main influencing factors of the m value, among which, the salinity of water medium is the most basic factor to decide the magnitude of the m value. If the three influencing factors change in the same direction, the change of the m value is in superposition with greater magintude. If the salinity and pH change in the opposite directions and the △pH is over 0.06, the m value is influenced distinctly and changes in the same direction as pH.The characteristics of seasonal changes of the m value in the Daya Bay sediments show that the response of the m value to water medium change in the sedimentary environment is sensitive. This also indicates that the m value can respond sensitively to water medium changes.

关 键 词：表层 沉积物 镁 铝 含量比 港湾 

分 类 号：P736.41[天文地球—海洋地质]