摘要
自1979年起,中国科学院南海海洋研究所沉积研究室在南海进行海洋沉积调查以来,多次在南海海盆及陆坡采到锰结核,虽曾作过报道,尚欠系统的分析研究.近几年来,我们对所采集的各种形态的锰结核,分别进行了较系统的显微镜下鉴定,配合扫描电镜观察、电子探针及能谱分析、矿物X射线衍射分析及生长速率的测定,进而对南海海盆及陆坡锰结核的特征、分布规律及形成机制进行分析研究,为进一步普查南海铁锰矿产资源提供资料。
According to the morphology, manganese nodules from the South China Sea may be classified into forms of nodules, micro nodules, organic-shaped nodules, granular nodules, and crustaceous nodules. They are discretely distributed within 18°-21° 30'N, 115°-118°E in a water depth of 1500-4000m on the continental slope and in the central sea basin. These nodule forms are distinct in regional distribution but are closely associated with loraminiferal silty clay, radiolarian silty clay, and radiolarian clay.Contents of useful metals, such as Mn, Fe, Cu, Co. Ni, etc., in the manganese nodules differ with different nodule forms. In the nodule form Fe and Co are higher than Mn and Ni,while in other nodule forms the Mn/ Fe ratios are generally between 3-14.The genesis of manganese nodules is complicated but mainly colloid-chemical. The growth rate of nodules is similar to that in the Pacific.
出处
《热带海洋学报》
CAS
1988年第3期10-18,103-104,共11页
Journal of Tropical Oceanography
