The problem of reconstructing the history of hydrothermal ore formation in oceans is solved in the study of the rock columns and individual core samples of deep-sea drilling holes which exposed metalliferous and transitional sediments containing hydrothermal rock materials. The study of the columns of proximal metal-bearing sediments from hydrothermal fields allow one to reconstruct the history of hydrothermal ore formation in individual structural features. The study of the cores of distal metalliferous sediments, located at the distances of a few kilometers to a few dozens of kilometers from the axis of a spreading ridge, allows one to reconstruct the history of hydrothermal ore formation using individual hydrothermal fields or their groups. The studies of the distal metalliferous sediments, penetrated by deep-sea drilling holes allow one to reconstruct the history of hydrothermal ore deposition in the large segments of ocean-floor spreading ridges, to locate the old areas of hydrothermal ore formation, to characterize its intensity, and to locate the modern positions of buried hydrothermal ore deposits. The use of metalliferous sediments allowed the reconstruction of the hydrothermal ore formation in individual areas and hydrothermal fields of the Mid-Atlantic Ridge and also in some areas of the East-Pacific Rise.