Previous studies have shown that the ascending, oxidizing brines play a very important role in Kupferschiefer mineralization. Fractures could be the pathway of the brines. In order to clarify the influences of the bri...Previous studies have shown that the ascending, oxidizing brines play a very important role in Kupferschiefer mineralization. Fractures could be the pathway of the brines. In order to clarify the influences of the brines on bulk organic matter, aromatic hydrocarbons and Kupferschiefer mineralization, one veinlet Kupferschiefer profile from the Lubin mine, southwestern Poland was studied with the microscopic, geochemical and Rock-Eval methods. The microscopic results indicate that organic matter of the veinlet sample consists dominantly of bitumen. Its extract content is higher than in other samples. The dominant aromatic compounds are naphthalene and alkylated naphthalenes (Na-PAH), which have migrated into the veinlet sample from other sediments. The content of phenanthrene and its methylated derivatives (Ph-PAH) is much lower than in other samples. The reason may be due to their heavier mass than Na-PAH. It is more difficult for Ph-PAH to migrate. The Na-PAH was probably removed from the shale by distillation and enriched in fractures because of their relatively low boiling point. The content of biphenyl and alkylated biphenyls (Bi-PAH) indicates the influence degree of oxidizing fluids. Their content in the veinlet sample is higher than in other sample. The high Tmax value of the veinlet sample also reveals a more intense influence of the oxidizing fluids than in other samples. Besides the higher Tmax value, its HI value is higher than in other samples. One can presume that its original hydrocarbon content should be higher than this value because they could be partly depleted by the brines.展开更多
Ali Javad porphyry copper-gold deposit is located in Arasbaran porphyry copper belt at northwestern Iran, some 20 km east of Sungun Mine. Porphyry mineralization at the Ali Javad deposit occurred in post-Oligocene qua...Ali Javad porphyry copper-gold deposit is located in Arasbaran porphyry copper belt at northwestern Iran, some 20 km east of Sungun Mine. Porphyry mineralization at the Ali Javad deposit occurred in post-Oligocene quartz monzonite bodies which intruded in the Eocene volcanic rocks. Mineralization occurred as veins, veinlets and dissemination both as hypogene and supergene type. Several types of veinlets were distinguished during the study of the deposit. Fluid inclusion studies on fluids trapped in quartz which were taken from drill core samples indicated a wide range of homogenization temperature in the veinlets from 138°C to 565°C which their salinity demonstrated 33 - 61 wt% NaCl equivalent. Mineralizing fluids density at the deposit was 0.8 - 1.2 g/cm<sup>3</sup>. Fluid inclusion studies suggested that Ali Javad deposit is an Au-rich porphyry copper deposit;its fluid inclusion features were comparable with other porphyry deposits.展开更多
基金This study was financially supported by Deutsche Forschungsgemeinschaft Pu 7312-5the National Major Fundamental Research and Development Project(No.G19990433).
文摘Previous studies have shown that the ascending, oxidizing brines play a very important role in Kupferschiefer mineralization. Fractures could be the pathway of the brines. In order to clarify the influences of the brines on bulk organic matter, aromatic hydrocarbons and Kupferschiefer mineralization, one veinlet Kupferschiefer profile from the Lubin mine, southwestern Poland was studied with the microscopic, geochemical and Rock-Eval methods. The microscopic results indicate that organic matter of the veinlet sample consists dominantly of bitumen. Its extract content is higher than in other samples. The dominant aromatic compounds are naphthalene and alkylated naphthalenes (Na-PAH), which have migrated into the veinlet sample from other sediments. The content of phenanthrene and its methylated derivatives (Ph-PAH) is much lower than in other samples. The reason may be due to their heavier mass than Na-PAH. It is more difficult for Ph-PAH to migrate. The Na-PAH was probably removed from the shale by distillation and enriched in fractures because of their relatively low boiling point. The content of biphenyl and alkylated biphenyls (Bi-PAH) indicates the influence degree of oxidizing fluids. Their content in the veinlet sample is higher than in other sample. The high Tmax value of the veinlet sample also reveals a more intense influence of the oxidizing fluids than in other samples. Besides the higher Tmax value, its HI value is higher than in other samples. One can presume that its original hydrocarbon content should be higher than this value because they could be partly depleted by the brines.
文摘Ali Javad porphyry copper-gold deposit is located in Arasbaran porphyry copper belt at northwestern Iran, some 20 km east of Sungun Mine. Porphyry mineralization at the Ali Javad deposit occurred in post-Oligocene quartz monzonite bodies which intruded in the Eocene volcanic rocks. Mineralization occurred as veins, veinlets and dissemination both as hypogene and supergene type. Several types of veinlets were distinguished during the study of the deposit. Fluid inclusion studies on fluids trapped in quartz which were taken from drill core samples indicated a wide range of homogenization temperature in the veinlets from 138°C to 565°C which their salinity demonstrated 33 - 61 wt% NaCl equivalent. Mineralizing fluids density at the deposit was 0.8 - 1.2 g/cm<sup>3</sup>. Fluid inclusion studies suggested that Ali Javad deposit is an Au-rich porphyry copper deposit;its fluid inclusion features were comparable with other porphyry deposits.
基金the National Natural Science Foundation of China, Grant No. 30270100special fund of Biology Sciences and Technique of the Chinese Academy of Sciences,Grant No.STZ-01-35
