Abstract:Ore deposits and wall rocks in this porphyry copper ore belt have distinct alteration zoning, composed mainly of K-alteration, silicification, sericitization, kaolinization, hornstonization and propylitization. Superposed alterations are closely related to the ore mineralization, and propylitization serves as a good indicator for ore prospecting. Mineralization and alteration seem to depend on the lithology of country rocks: carbonate rocks have been altered into marble and skarn; from the contact zone outward, elastic rocks have been changed into K-silicification zone→hornstone→propylite→decolorization zone successively. Ore-bearing porphyry bodies have all been subjected to Superimposed alteration. The horizontal zoning and vertical zoning of mineralization are characterized by Mo in the inner part while Cu in the outer part, and Cu in the upper part while Mo in the lower part respectively. The stratoid rich ore-bodies distributed around the contact zone in Yulong have oxidized zone and secondary enrichment zone of sulfide ores. Three metallogenic epochs can be roughly recognized on the basis of fluid inclusion studies.
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周宜吉.1985.试论玉龙斑岩铜矿带内矿床的蚀变和矿化分带[J].矿床地质,4(2):23~30.1985.Alteration and mineralization zoning of ore deposlts in the Yulong porphyry copper belt[J].Mineral Deposits4(2):23~30
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