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地质调查所正以伊豆—小笠原海域为对象进行“有关伴随于海底热液活动的重金属资源评价方法的研究”(工业技术院特别研究,1984—1988年五年计划)。进入八十年代以来,提出不是大洋中脊的某些岛弧(弧状列岛)具有热液矿床形成条件的可能,以及伊豆—小笠原弧也许相当于那种岛弧之一的观点。作为上述研究项目一环,“白岭号”地质调查船进行了GH85—1号航海(1985年
The Institute of Geological Survey is conducting “Research on Methods for Evaluating Heavy Metals Resources Associated with Seabed Hydrothermal Activity” (IED Special Research, 1984-1988 Five-Year Plan) for the Izu-Ogasawara Sea Area. Since the 1980s, it has been proposed that some island arcs (arc-shaped islands) that are not mid-ocean ridges have the potential to form hydrothermal deposits and that the Izu-Ogasawara Arc may correspond to one of those island arcs. As a part of the above research project, the “Bai Ling” geological survey vessel carried out No. GH85-1 Navigation (1985