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首页> 外文期刊>Geochemistry: Exploration, Environment, Analysis >Correlation of carbon with acid-soluble elements in Finnish lake sediments: two opposite composition trends
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Correlation of carbon with acid-soluble elements in Finnish lake sediments: two opposite composition trends

机译：芬兰湖泊沉积物中碳与酸溶性元素的相关性：两个相反的组成趋势

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摘要

Rank order correlation coefficients (rC,X) were determined between C and the nitric acid-soluble elements Al, Ba, Ca, Co, Cr, Cu, Fe, K, Mg, Mn, P, S, Sr, Ti, V, Zn and N in lake sediments. Nitrogen and S concentrations increased together with C from the point of isolation towards the top of the sediment, whereas Ca, Cr, Cu, K, Mg, Na, Ni and Ti concentrations decreased. In the case of Al, Ba, Co, Fe, Mn, V and Zn, two divergent patterns were seen, their concentrations either decreasing or increasing towards the top of the sediment. Of the rC,P values, 91% were positive and 9% negative. The sediment cores were classified into three groups on the basis of the correlations between C and Co, Fe, Mn and Zn: (1) rC,Co, rC,Fe, rC,Mn and rC,Zn statistically significant and negative; (2) rC,Co, rC,Fe, rC,Mn and rC,Zn not statistically significant; and (3) rC,Co, rC, Fe, rC,Mn and rC,Zn statistically significant and positive. In the light of the geochemical properties of the sediments, it was concluded that those in group 1 had been deposited under reducing and/or acidic conditions in small, shallow lakes containing high concentrations of C and those in group 3 under oxidative and/or alkaline conditions in large, deep lakes, while those in group 2 represent intermediate forms. It was approximated that C 9% in sediment provides precipitation of Fe–Mn oxides, but it is impeded by greater C concentrations. Also, sedimentation of terrigenous till material was found to be more effective in small than in large lakes.
机译：确定 C和硝酸可溶性元素Al，Ba，Ca，Co，Cr，Cu，之间的等级相关系数（r C，X ） 湖泊沉积物中的Fe，K，Mg，Mn，P，S，Sr，Ti，V，Zn和N。 氮和S的浓度随C的增加而升高。 sup>隔离点朝向沉积物的顶部，而 Ca，Cr，Cu，K，Mg，Na，Ni和Ti的浓度降低。在 的情况下，观察到Al，Ba，Co，Fe，Mn，V和Zn的两个发散图 ，它们的浓度降低或升高 朝向沉积物的顶部。在r C，P 值中， 为91％，阴性。根据C 与Co，Fe，Mn和Zn之间的相关性，将沉积物芯分为 分为三类：（1）rC，Co，rC，Fe， r C，Mn 和r C，Zn 在统计上 显着且为负； （2）r C，Co ，r C，Fe ，r C，Mn 和r C，Zn 没有统计学意义；和（3）r C，Co ，r C ， Fe ，r C，Mn < / sup>和r C，Zn 具有统计学意义且为正。根据沉积物的地球化学性质，得出的结论是第1组中的沉积物是在还原和/或酸性条件下沉积的。在C浓度 的小型浅水湖泊中，以及在氧化和/或碱性条件下在第3组的大型深水湖泊中的 ，而第2组中的湖泊则表示中等水平< sup> 表格。近似地，沉积物中的C 9％提供了Fe-Mn氧化物的沉淀 ，但由于较高的C浓度而受到阻碍。 此外，发现了陆源直到材料的沉积 在小湖中比在大湖中更有效。

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