The Xinqiao S-Fe-Cu-Au orefield is located in the Tongling ore cluster in the middle and lower reaches of the Yangtze River in East China. There have been many researches regarding the genesis of the Xinqiao orefield ...The Xinqiao S-Fe-Cu-Au orefield is located in the Tongling ore cluster in the middle and lower reaches of the Yangtze River in East China. There have been many researches regarding the genesis of the Xinqiao orefield in recent years, showing that it belongs to various types, such as sedimentary-reformed type, stratabound-skarn type, sedimentary submarine rocks-hosted exhalative type. We propose that it was formed in two periods of mineralization base on systematic field observation and Pb and S isotopic analyses in nearly ten years. The first period was formed during a syngenetic sedimentary process, whereas the massive sulphide orebodies are mainly related to the Yanshanian granitic magmatism. Sulfide metallic mineral associations show zoning around a granite intrusion, i.e. magnetite and pyrite→pyrite, chalcopyrite and native gold→pyrite, sphalerite and galena. Gold orebodies occur outside the contact zone of the granite intrusion.展开更多
Iron oxide copper-gold （IOCG） deposits are a research focus of the current ore deposit geology, and have attracted much attention among the worldwide geologists and exploration experts due to their shallow depth, a ...Iron oxide copper-gold （IOCG） deposits are a research focus of the current ore deposit geology, and have attracted much attention among the worldwide geologists and exploration experts due to their shallow depth, a wide variety of mineral species and large scale. This paper presents a review of the present IOCG deposits research, which includes the definition of IOCG deposits, temporal and spatial distribution, ore-forming environments, ore-forming magmatic rocks, their geological features, ore-controlling structures and ore-bearing rocks, mineralized alteration zoning, and their genesis and ore-forming process. This work also proposed the ore prospecting direction of IOCG deposits from a trinity model of metaUogenic geological bodies, metallogenic structure surface and metailogenic information signs, and discussed the existing problems of the IOCG deposits research.展开更多
基金the State Key Basic Research Program of China(No.G1999043206)the National Natural Science Foundation of China(No.40372050)+1 种基金the Project of Resources Assessment of the Geological Surveyof China(No.200310200064) the Key Laboratory of Lithospheric Tectonics and Lithoprobing Technology.
文摘The Xinqiao S-Fe-Cu-Au orefield is located in the Tongling ore cluster in the middle and lower reaches of the Yangtze River in East China. There have been many researches regarding the genesis of the Xinqiao orefield in recent years, showing that it belongs to various types, such as sedimentary-reformed type, stratabound-skarn type, sedimentary submarine rocks-hosted exhalative type. We propose that it was formed in two periods of mineralization base on systematic field observation and Pb and S isotopic analyses in nearly ten years. The first period was formed during a syngenetic sedimentary process, whereas the massive sulphide orebodies are mainly related to the Yanshanian granitic magmatism. Sulfide metallic mineral associations show zoning around a granite intrusion, i.e. magnetite and pyrite→pyrite, chalcopyrite and native gold→pyrite, sphalerite and galena. Gold orebodies occur outside the contact zone of the granite intrusion.
基金financially supported by the investment and financing strategy research of the international mining capital market
文摘Iron oxide copper-gold （IOCG） deposits are a research focus of the current ore deposit geology, and have attracted much attention among the worldwide geologists and exploration experts due to their shallow depth, a wide variety of mineral species and large scale. This paper presents a review of the present IOCG deposits research, which includes the definition of IOCG deposits, temporal and spatial distribution, ore-forming environments, ore-forming magmatic rocks, their geological features, ore-controlling structures and ore-bearing rocks, mineralized alteration zoning, and their genesis and ore-forming process. This work also proposed the ore prospecting direction of IOCG deposits from a trinity model of metaUogenic geological bodies, metallogenic structure surface and metailogenic information signs, and discussed the existing problems of the IOCG deposits research.
