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对东南太平洋(纳斯卡板块北部)深海铁锰结核的金属含量、形状及沉积环境进行了研究。该区结核聚积生长的过程有两种:(1)早期成岩生长过程,由孔隙水补给;(2)水成成岩生长过程,由近底海水补给。由此,形成不同成因类型的结核。根据Mn/Fe比,可将该盆地清楚地分出三种铁锰相。自南向北Mn/Fe比普遍增大。而Ni和Cu的浓度,在Mn/Fe比约为5的中相呈明显的最大值。计算Mn/Fe比与(Ni+Cu)的相关性时,回归双曲线显示出最佳相关系数,并把结核量分为两组。双曲线的上升和下降部分代表由不同聚积机制控制的两种地球化学区。
The metal content, shape and depositional environment of the deep sea Fe-Mn nodules in the southeast Pacific (northern part of NASCAR plate) were studied. There are two types of tuberculosis accumulation and growth in this area: (1) early diagenesis growth, which is recharged by pore water; and (2) water is converted into diagenesis by near-bottom seawater recharge. As a result, tuberculosis of different genetic types is formed. According to the Mn / Fe ratio, three iron-manganese phases can be clearly separated from this basin. From north to south Mn / Fe ratio generally increased. However, the concentrations of Ni and Cu show a significant maximum in the middle phase with an Mn / Fe ratio of about 5. When calculating the correlation between Mn / Fe ratio and (Ni + Cu), the regression hyperbola showed the best correlation coefficient and the tuberculosis volume was divided into two groups. The ascending and descending parts of the hyperbola represent two geochemical zones controlled by different accumulation mechanisms.