试论大洋多金属结核的金属物质来源

SOURCES OF METALLIC MATERIALS IN DEEP-SEA POLYMETALLIC MODULES

研究多金属结核的金属物质来源对认识多金属结核的生成和分布具有重要意义.本文初步认为:大陆径流、洋底热液活动为深海多金属结核提供的金属物质可能是有限的,而玄武岩类火山物质的海解作用则可能是深海多金属结核的主要物质来源.

The knowledge of sources of metallic materials in deep-sea ploymetallic nodules will greatly help clarify the d'istributions and origins of polymetallic nodules in oceans. Through study and analysis, the author has preliminarily pointed out that Continental runoffs and sea-floor hydrothermal actiyities have provid'ed very limited metallic materials and sea-water dissociation of basaltic volcanic materials perhaps acts as the main sources. The deep-sea polymetallic nodules and crusts, massive sulfide deposits, and polymetallic mud found recently are all probably sea-floor mineral resources, formied in different environments, and the metallic elements of which mainly come from basaltic volcanic materials. Therefore, the study of types, characteristics, distribution and the relation with mineralization of sea-floor basaltic volcanic materials should be further done.