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远洋沉积物是多金属结核赖以生长的场所，本文系统地研究了沉积物中主要成矿元素水成组分在不同地球化学场和不同沉积阶段的地球化学特征，以及水成组分的含量比与成矿作用的相互关系。研究表明，Ｍｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ都是一些比较活泼的元素，它们共处于多金属结核、沉积物和大洋水的统一体系中，当结核形成时，Ｍｎ、Ｆｅ、Ｎｉ、Ｃｕ在结核与沉积物中的含量呈负相关，而Ｃｏ含量呈正相关。研究区东部结核以富含Ｍｎ、Ｎｉ、Ｃｕ贫Ｆｅ、Ｃｏ为特征，其伴生沉积物相对贫Ｍｎ、Ｎｉ、Ｃｕ、Ｃｏ，而富Ｆｅ，可称之为贫化的地球化学场。研究区西部结核富含Ｆｅ、Ｃｏ而贫Ｍｎ、Ｎｉ、Ｃｕ，其伴生沉积物则相应贫Ｆｅ，而富Ｍｎ、Ｎｉ、Ｃｕ、和Ｃｏ，可称之为富化的地球化学场。可以看出，贫化的沉积物地球化学场，恰恰是寻找富矿结核的最佳场所。早中新世以来的沉积物，根据水成组分的含量或含量比，也可相应于结核的形成分为三大沉积阶段，其中的第Ⅱ阶段具有贫化的地球化学特征，是多金属结核形成的最有利时期
The oceanic sediments are the places where the polymetallic nodules are growing. This paper systematically studies the geochemical characteristics of the major metallogenic elements in the sediments at different geochemical fields and in different depositional stages, as well as the contents of water components Correlation with mineralization. The results show that Mn, Fe, Co, Ni, Cu are some of the more active elements, which are in a unified system of polymetallic nodules, sediments and ocean water. When tuberculosis is formed, Mn, Fe, Ni, Tuberculosis and sediment content was negatively correlated, while Co content was positively correlated. The eastern part of the study area is characterized by rich Mn, Ni and Cu lean Fe and Co, and its associated sediments are relatively poor in Mn, Ni, Cu, Co and rich in Fe, which can be called depleted geochemical field. In the study area, the western tuberculosis is rich in Fe and Co, but poor in Mn, Ni and Cu. The associated sediments are correspondingly depleted in Fe, and rich in Mn, Ni, Cu and Co are rich geochemical fields. It can be seen that the depleted sedimentary geochemical field is precisely the best place to find the rich ore nodules. According to the content or content ratio of water components, the sediments from the Early Miocene can also be divided into three sedimentary stages corresponding to the formation of nodules, of which Stage II has depleted geochemical characteristics and is a metal Tuberculosis formed the most favorable period