ANOXIC ENVIRONMENT AND FORMATION OF SUPERLARGE ORE-DEPOSITS

The formation of many metallic and non-metallic ore deposits is a resu lt of coupling of mineralization, related to anoxic environment and re gional, or global background. Interaction, concordance and continual d evelopment of the mineralization and environmental background control the large to superlarge scale of ore deposits. Three kinds of ore-form ing models related to anoxic environment and three important backgroun d patterns are suggested. The turning period of geological history is favorable to the formation of large to superlarge ore deposits.