概述60年代前后，人们开始对深海海底矿物资源感兴趣，这个时期以美国为中心开始有关的勘探、开发活动。70年代开始对锰结核矿等进行勘探；80年代，作为新的海底矿物资源，勘探的重点放在海底热液矿床、富钻地壳等方面。日本也着手这个领域的勘探活动。然而，探查海底矿物资源 Overview Before and after the 1960s, people began to be interested in deep-sea seabed mineral resources. During this period, the United States started its exploration and development activities. In the 1970s, the exploration of manganese nodules and other minerals began. In the 1980s, as the new seabed mineral resources, the exploration focused on the seabed hydrothermal deposits and the rich drilling crust. Japan is also engaged in exploration activities in this area. However, exploration of seabed mineral resources