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通过对东北太平洋海域中国多金属结核开辟区沉积物间隙水中铜、锰、镍等微量元素的详细研究表明,锰主要受沉积环境的影响,其含量的变化范围在0.16～8.61μg/dm~3之间;铜和镍则主要与表层海水的初级生产力有关,研究区内间隙水中铜和镍含量的变化范围分别为0.16～20.8和0.80～3.12μg/dm~3,且这些元素在沉积物—水界面处均存在最大浓度梯度.利用“Fick扩散定律”计算表明,锰在研究区主要是从上覆海水向沉积物扩散,是沉积物中锰的主要来源之一;而铜和镍则是从沉积物向上覆海水扩散,是底层海水中铜和镍的主要来源。与表层海水中铜和镍向底层海水的输送通量计算结果相比,底层海水中铜和镍的含量主要受沉积物的控制.
A detailed study on the trace elements Cu, Mn, Ni and other trace elements in sediment interstitial water in the open sea polymetallic nodules in the northeastern Pacific Ocean shows that manganese is mainly affected by sedimentary environment, and its content varies from 0.16 to 8.61 μg / dm 3 Copper and nickel are mainly related to the primary productivity of surface seawater. The variation range of copper and nickel in the interstitial water in the study area is 0.16-20.8 and 0.80-3.12μg / dm 3, respectively, and the contents of these elements in the sediment- The maximum concentration gradient exists at the water interface. The calculation of Fick’s diffusion law shows that manganese diffuses into sediments mainly from overlying seawater, which is one of the main sources of manganese in the sediments; while copper and nickel are Diffusion from sediments to overlying seawater is the main source of copper and nickel in the bottom seawater. The copper and nickel contents in the bottom seawater are mainly controlled by sediments, as compared with the calculated results for the transport flux of copper and nickel in the surface seawater to the bottom seawater.