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沉积物粘土混浊水电导率与pH值相关性研究——以渤海湾西岸平原XZ、MD钻孔为例

DOI: 10.11928/j.issn.1001-7410.2015.02.07, PP. 319-325

Keywords: 渤海湾,粘土混浊水电导率,pH,相关分析,沉积环境

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Abstract:

对渤海湾西岸平原XZ、MD钻孔样品的粘土混浊水电导率(以下简称EC)和pH测定值进行相关分析,结果显示EC与pH都呈高度负相关,两孔的相关系数分别为-0.830(P<0.01)和-0.765(P<0.01).整体上EC与pH呈反比特征.进一步根据EC测定值将两钻孔沉积物分为海相、海陆过渡相和陆相分带,并对各分带中的EC和pH作相关性分析,结果表明除XZ孔海相沉积带(Ⅰ带)相关性偏低(r=0.089,P>0.05)外,其他各沉积带均显示较明显的负相关.但负相关性也有所不同,XZ孔海陆过渡相沉积带(Ⅱ带,r=-0.740,P<0.01)负相关性最为明显;MD孔海陆过渡相沉积带(Ⅰ带,r=-0.434,P<0.01)、XZ孔陆相沉积带(Ⅲ带,r=-0.403,P<0.05)和MD孔陆相沉积带(Ⅱ带,r=-0.482,P<0.05)也有较明显的负相关性.这表明沉积物EC与pH相关程度的差异,亦可在一定程度上反映出其沉积环境的不同.

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