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本文对1983年中太平洋锰结核调查中所取的10个站沉积物、间隙水以及表层上覆水体等样品,进行了沉积物固相Ca、Mg、碳酸盐含量以及间隙水和上覆水体中Ca~(2+)、M~(2+)等项的测定,并与东海陆架区某些有关资料进行对比,以探讨Ca、Mg的分离、聚集及过程的制约因子和机制等问题。结果表明,测区沉积物Ca、Mg的分离和聚集与水深制约有密切的关系。在固相与水相之间的关系上,从水相中Mg~(2+)优势转变为沉积物固相Ca优势的过程事实上就是Ca、Mg分离与聚集的质变过程,其原因与Ca、Mg碳酸盐的溶解度有关。文章着重探讨了间隙水与上覆水体之间的分离、聚集关系和环境pH对过程的重要影响。
In this paper, samples of sediment, interstitial water and overlying water from 10 stations in the mid-Pacific Mn-Mn survey were analyzed in 1983, and the contents of Ca, Mg and carbonate in the sediments were determined. The interstitial water and overlying water Ca 2+ and M 2+ in the East China Sea were compared with those of some related data in the East China Sea shelf area to discuss the factors and mechanism of Ca, Mg separation, aggregation and process. The results show that there is a close relationship between the separation and accumulation of Ca and Mg in the sediments and the water depth. In the relationship between the solid phase and the aqueous phase, the process of transition from the dominant Mg 2+ in the aqueous phase to the predominant phase Ca in the aqueous phase is in fact the qualitative and quantitative change of Ca and Mg separation and aggregation. The reason for this is that Ca , Mg carbonate solubility. The article focuses on the separation of interstitial water and the overlying water body, the aggregation relationship and the influence of pH on the process.