DISTRIBUTION CHARACTER AND SOURCE OF Sr, Ti IN FERROMANGANESE NODULES FROM THE PACIFIC
太平洋铁锰结核中Sr,Ti的分布特征及其来源

This paper deals with the distribution and source of Sr, Ti in ferromanganese nodules from the Pacific North region (7°-13°N, 178°-165°W) by analysing the Sr, Ti, Fe, Mn in the 80 ferromanganese nodules samples from 26 stations.The result shows that the average values of Sr, Ti in ferromanganese nodules are 0.040% and 0.64% respectively, increase with the decrease of the size of the ferromanganese nodules and the depth of sea water. There is a positive correlation between Sr and Ti. As the source of Sr, Ti mainly come from the deposition of Sr2+, Ti2+, the concentrations of Sr and Ti in the ferromanganese nodules in glossy surface exposed to sea water are higher than that in rough surface contacting the sediment.