Formation of the micro-disseminated strata-bound gold deposits, with special reference to structural evolution, Miliang area, Zhen’an County, Shaanxi Province, China
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Based on detailed geologic study, the important role of structuring in the formation of gold deposits in the area is discussed with special reference to structural evolution. Syngenetic faulting contemporaneous with tectonic-volcanic events is thought to be responsible for providing the ore-forming material at depth. The lithofacies formed by highly alternating deposition of terrestrial and carbonate detritus is chemically characterized by the assemblage of Au−Sb−As, constituting a favorable source bed for the activation and enrichment of gold. This gold source bed has undergone four major stages of structural deformation, accompanied by multi-staged alteration and mineralization.
Key wordsmicro-disseminated strata-bound gold deposit syngenetic fault ductile-brittle shearing Miliang area of Shaanxi Province
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