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- W2389328383 abstract "Bainaimiao, located on the northern margin of North China Plate, is an important gold mineralization area. The gold deposits that occur in greenschist of the Bainaimiao Formation and the Hercynian igneous rocks, are classified two mineralization types: quartz vein and quartz vein +altered host rocks. The values of Co/Ni of pyrite in ores are from 125 to 204; the gold abundance of the Hercynian quartz diorite and plagiogranite varis from 906×10-9 to 150×10-9; the compositions of the lead isotopes from ores and the Hercynian plagiogranite share similar characteristics. Those data indicate that Hercynian magmatic rocks are probably the metallogenic host rocks of the deposits. The values of Δγ(1665 to 4251) and Δβ(1161 to 3027) of the lead isotope and δ34S(-426‰ to +28‰) of the sulfides in ores suggest that the oreforming substances are related to plutonic magma. According to the isotopes of hydrogen, oxygen and carbon(δDwater-17504‰ to -1089‰,δ18Owater-1098‰ to 002‰,δ13C-5695‰),the oreforming fluid was originally derived from the magma; and it mixed with meteoric water in its evolution. It is suggested that the regional tectonic regime changed from compression to extension in Hercynian period, and the gold mineralization occurred in the extensional dynamical environment in which the orecontrolling structures have undergone multiextended activities. It's considered that Au might move as AuCl-2, Au(HS)-2 or AuH3SiO4 in the oreforming fluid." @default.
- W2389328383 created "2016-06-24" @default.
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- W2389328383 date "2003-01-01" @default.
- W2389328383 modified "2023-09-28" @default.
- W2389328383 title "MINERALIZATION OF GOLD DEPOSITS IN THE BAINAIMIAO AREA,INNER MONGOLIA" @default.
- W2389328383 hasPublicationYear "2003" @default.
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