Thermodynamic equilibrium calculations were performed to reveal effects of interactions among Cl, S, P and other minerals on Cu migration. Our results showed that HCl（g）, SO2（g） and （P2O5）2（g） were released fr...Thermodynamic equilibrium calculations were performed to reveal effects of interactions among Cl, S, P and other minerals on Cu migration. Our results showed that HCl（g）, SO2（g） and （P2O5）2（g） were released from the sewage sludge co-incineration. Cl was found to weaken adsorption of Cu by Al2O3, CaO and Fe2O3, while S de- layed reactions of Fe2O3 and Al2O3 with Cu, with P having no effect on reactions between the minerals and Cu. Among the coupled systems ofCl, S and P, the co-existences of Cl and S, and Cl, S and P were determined to inhibit Cu volatilization, and the co-existence of Cl and P had an enhancing effect Cu migration was affected only by S in the S and P system. With the SiO2, CaO and Al2O3 system, both Cl alone and Cl and P led to failed reactions be- tween the minerals and Cu. In the systems of S, S and Cl, S and P, and S, Cl and P, the migration behavior of Cu was mainly affected by S at low temperatures and by Cl at high temperatures, whereas P had no effect on Cu mi- gration during the entire nrocess.展开更多
Xintian polymetallie deposit is a hydrothermal vein type Cu-Mo deposit. Analysis on Re-Os isotopic dating for the molybdenite from this deposit is undertaken to determine metallogenic epoch and dynamics setting of the...Xintian polymetallie deposit is a hydrothermal vein type Cu-Mo deposit. Analysis on Re-Os isotopic dating for the molybdenite from this deposit is undertaken to determine metallogenic epoch and dynamics setting of the deposit. Re-Os isotopic dating for the molybdenite yields model ages ranging from 123.9 ± 1.9 Ma to 124.7 ± 1.8 Ma, with a weighted mean age of 123.4 ±0.81 Ma, and an isochron age of 127 ± 16 Ma, MSWD = 0.25, indicating that the metallization was at late Yanshanian. The content of Re in molybdenite is （330.1 ±4.0-367.9 ± 3.1 ） xl0^-6, which demonstrates mantle derived metallogenic sources. Integrating the region-al tectonic evolution and the metallogenic characteristics of other contemporaneous Cu-Mo deposits in the re-gion, it is suggested that the Cu-Mo mineralization of this deposit occurred in an active epieontinental environ-ment under lithospheric extension resulted from the subduction of the Izanagi plate to the Paleo-Asia continental margin at late Yanshanian. The Mantle wedge was partially melted with large amount of metallogenic elements dissolved in it. Under the favorable conditions of crust-mantle interaction, large-scale magmatic activity turns out to be the important mechanism of the mineralization of many Cu-Mo deposits in the Xiaoxingan Range-Zhangguangcai Mountain metallogenic belt, including the Xintian Cu-Mo polymetallic deposit.展开更多
基金Supported by the Science and Technology Planning Project of Guangdong Province,China(2017A0505010362015B020235013+4 种基金2015A0202150332017B090907012)the Scientific and Technological Planning Project of Guangzhou,China(2016201604030058201704030109)Guangdong Special Support Program for Training High Level Talents(2014TQ01Z248)
文摘Thermodynamic equilibrium calculations were performed to reveal effects of interactions among Cl, S, P and other minerals on Cu migration. Our results showed that HCl（g）, SO2（g） and （P2O5）2（g） were released from the sewage sludge co-incineration. Cl was found to weaken adsorption of Cu by Al2O3, CaO and Fe2O3, while S de- layed reactions of Fe2O3 and Al2O3 with Cu, with P having no effect on reactions between the minerals and Cu. Among the coupled systems ofCl, S and P, the co-existences of Cl and S, and Cl, S and P were determined to inhibit Cu volatilization, and the co-existence of Cl and P had an enhancing effect Cu migration was affected only by S in the S and P system. With the SiO2, CaO and Al2O3 system, both Cl alone and Cl and P led to failed reactions be- tween the minerals and Cu. In the systems of S, S and Cl, S and P, and S, Cl and P, the migration behavior of Cu was mainly affected by S at low temperatures and by Cl at high temperatures, whereas P had no effect on Cu mi- gration during the entire nrocess.
基金Supported by Project of China Geological Survey(No.12120113098300)
文摘Xintian polymetallie deposit is a hydrothermal vein type Cu-Mo deposit. Analysis on Re-Os isotopic dating for the molybdenite from this deposit is undertaken to determine metallogenic epoch and dynamics setting of the deposit. Re-Os isotopic dating for the molybdenite yields model ages ranging from 123.9 ± 1.9 Ma to 124.7 ± 1.8 Ma, with a weighted mean age of 123.4 ±0.81 Ma, and an isochron age of 127 ± 16 Ma, MSWD = 0.25, indicating that the metallization was at late Yanshanian. The content of Re in molybdenite is （330.1 ±4.0-367.9 ± 3.1 ） xl0^-6, which demonstrates mantle derived metallogenic sources. Integrating the region-al tectonic evolution and the metallogenic characteristics of other contemporaneous Cu-Mo deposits in the re-gion, it is suggested that the Cu-Mo mineralization of this deposit occurred in an active epieontinental environ-ment under lithospheric extension resulted from the subduction of the Izanagi plate to the Paleo-Asia continental margin at late Yanshanian. The Mantle wedge was partially melted with large amount of metallogenic elements dissolved in it. Under the favorable conditions of crust-mantle interaction, large-scale magmatic activity turns out to be the important mechanism of the mineralization of many Cu-Mo deposits in the Xiaoxingan Range-Zhangguangcai Mountain metallogenic belt, including the Xintian Cu-Mo polymetallic deposit.
