The results of recent mineral exploration in the Yuele lead-zinc mining area of Daguan County, northeastern Yunnan province, showed that there are much early Paleozoic strata under thick late Paleozoic strata in north...The results of recent mineral exploration in the Yuele lead-zinc mining area of Daguan County, northeastern Yunnan province, showed that there are much early Paleozoic strata under thick late Paleozoic strata in northeastern Yunnan province, where developed some hidden salt structures (SSs), often with lead-zinc polymetallic mineralization varying degrees along the tension torsional fault (belts) or fracture (joint). The ore-bodies belong to the epigenetic hydrothermal filling vein-type deposit, and the prospecting potential is great. In this area, the superficial mineralization information displayed clear, but the deep mineralization is unknown, so the exploration work is restricted. The audio-megnetotelluric (AMT) surveying is an advantageous method to characterize the size, resistivity and skin depth of the polarizable mineral deposit concealed beneath thick overburden. This paper presents the surveying results using AMT method to evaluate the concealed lead-zinc mineralization in Yuele lead-zinc ore field, Daguancounty, NE Yunnan province, China. After comparing the interpretation result of AMT surveying data with the geological data and the drilling data, it is found that there is some distinct difference in resistivity and polarizable between ore-bodies hosted strata, upper strata and gypsum strata. The results show that AMT method is helpful to identify lead-zinc mineralization under this geological condition.展开更多
Sudden cardiac death(SCD)is the leading cause of death from out-of-hospital cardiovascular disease worldwide,with an annual incidence of 1.4 per 100,000 in females and 6.8 per 100,000 in males.1 Most cases of SCD in o...Sudden cardiac death(SCD)is the leading cause of death from out-of-hospital cardiovascular disease worldwide,with an annual incidence of 1.4 per 100,000 in females and 6.8 per 100,000 in males.1 Most cases of SCD in older patients(>45 years)are caused by atherosclerotic coronary artery disease.SCD in younger patients(<45 years)is caused by inherited cardiovascular diseases.展开更多
文摘The results of recent mineral exploration in the Yuele lead-zinc mining area of Daguan County, northeastern Yunnan province, showed that there are much early Paleozoic strata under thick late Paleozoic strata in northeastern Yunnan province, where developed some hidden salt structures (SSs), often with lead-zinc polymetallic mineralization varying degrees along the tension torsional fault (belts) or fracture (joint). The ore-bodies belong to the epigenetic hydrothermal filling vein-type deposit, and the prospecting potential is great. In this area, the superficial mineralization information displayed clear, but the deep mineralization is unknown, so the exploration work is restricted. The audio-megnetotelluric (AMT) surveying is an advantageous method to characterize the size, resistivity and skin depth of the polarizable mineral deposit concealed beneath thick overburden. This paper presents the surveying results using AMT method to evaluate the concealed lead-zinc mineralization in Yuele lead-zinc ore field, Daguancounty, NE Yunnan province, China. After comparing the interpretation result of AMT surveying data with the geological data and the drilling data, it is found that there is some distinct difference in resistivity and polarizable between ore-bodies hosted strata, upper strata and gypsum strata. The results show that AMT method is helpful to identify lead-zinc mineralization under this geological condition.
基金supported by the National Natural Science Foundation of China(No.81800220 and 82000079)Hunan Province Natural Science Foundation(China)(No.2019JJ50890).
文摘Sudden cardiac death(SCD)is the leading cause of death from out-of-hospital cardiovascular disease worldwide,with an annual incidence of 1.4 per 100,000 in females and 6.8 per 100,000 in males.1 Most cases of SCD in older patients(>45 years)are caused by atherosclerotic coronary artery disease.SCD in younger patients(<45 years)is caused by inherited cardiovascular diseases.
