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- W2366322005 abstract "Located at the southern center of the Sichuan-Yunnan- Guizhou lead-zinc polymentallic mineralization domain on the southwestern margin of the Yangtze block, the Zhaotong lead- zinc deposit in Yunnan Province is a typical representative in northeastern Yunnan or even in Sichuan-Yunnan-Guizhou area. The deposit is characterized by vertical zoning from coarsegrained pyrite, dark-color sphalerite + ferro-dolomite + quartz, rosy sphalerite + galena + pyrite to fine-grained pyrite from bottom to top of the orebody. These typical features are different from known lead-zinc deposit types discovered both in China and abroad, suchas Mississipp Valley Type(MVT), Volcanic Hosted Massive Sulfide Type(VHMS), and Hydrothermal Sedimentation Type(SEDEX). The controlling of p H, logfo2, loga over the main metal sulfides and their assembly as well as mineral zoning will contribute to solving the formation mechanism of lead-zinc association and differentiation and the extreme enrichment of elements.Metallic minerals in the mineral zoning are the main study object, and p H-logfo2, p H-loga phase diagrams of the Zhaotong leadzinc deposit at ore- forming temperatures(373 K, 423 K, 473 K, 523 K) were drawn. On the basis of these phase diagrams, the characteristics of the mineral zoning in the Zhaotong lead-zinc deposit that are different from features of known lead-zinc deposit types discovered in the world could be explained successfully. It is believed that the association of temperature, oxygen fugacity,component concentration and p H caused the lead-zinc association and differentiation and controlled the precipitation of main metal mineral assemblages and the zonation of mineral assemblages. When the temperature drops, the logfo2 value rises, p H goes up, and the sulfide will precipitate more easily." @default.
- W2366322005 created "2016-06-24" @default.
- W2366322005 creator A5016572109 @default.
- W2366322005 date "2015-01-01" @default.
- W2366322005 modified "2023-09-24" @default.
- W2366322005 title "pH-logfo_2 and pH-loga for Pb-Zn paragenesis and separation in the Zhaotong lead-zinc deposit" @default.
- W2366322005 hasPublicationYear "2015" @default.
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