一、前言过去20多年间,主要从未来陆地资源枯竭这一预测出发,世界各国对海底矿物资源抱有很大期望。其中包括像石油、天然气那样具有重要地位而已正式进行工业开采的、像锰结核那样已被人们认识作为未来资源具有重要意义而在最近20年积极进行勘探的、以及预料到的未来潜在性资源等各种矿物资源。 I. Preface In the past two decades or so, mainly from the prediction of the depletion of land resources in the future, all countries in the world have great expectations for seabed mineral resources. These include the formally industrialized exploitation that is as important as oil and natural gas and are now known as manganese nodules that have been identified as significant for the future and actively explored in the last two decades, as well as the potential for the future. Various mineral resources.