Along both sides of the Tancheng-Lujiang Fracture Zone in eastern China, a series of mantle source gas pools constitute a massive-scale tectonic accumulation zone in NNE direction, with the mantle geochemical characte...Along both sides of the Tancheng-Lujiang Fracture Zone in eastern China, a series of mantle source gas pools constitute a massive-scale tectonic accumulation zone in NNE direction, with the mantle geochemical characteristics of high concentrations of CO2 and He, high 3He/4He-40Ar/36Ar ratio system and high δ13Coo2 ratios (the mainfrequency, -3.4‰-4.6‰), showing no difference from the tectonic framework of the area. In the area, thetectonic environment is a rift formed as a result of diapiric mantle injection and crust thinning to form graben-type basins and lithospheric fractures. The mantle-derived volcanic rocks and inclusions are well-developed and a high geothermal zone (mantlesource) exists in the area. The characteristics of the three components (solid, liquid and gas) of mantle, concentrated all over the same tectonic space zone, show that the rift system is of a good tectonic environment or passage for mantle degassing and gas migration. The main types of the gas pools are volcano,展开更多
TIANCHI volcano,Changbaishan Mountains isthe largest modern active volcano in East Chi-na.Many times strong volcanic erupting activ-ities occurred in the Cenozoic Era.The vol-canic activities have revived again in the...TIANCHI volcano,Changbaishan Mountains isthe largest modern active volcano in East Chi-na.Many times strong volcanic erupting activ-ities occurred in the Cenozoic Era.The vol-canic activities have revived again in the Re-cent.Field investigation results show thatthere are a lot of hydrothermal anomaly out-展开更多
文摘Along both sides of the Tancheng-Lujiang Fracture Zone in eastern China, a series of mantle source gas pools constitute a massive-scale tectonic accumulation zone in NNE direction, with the mantle geochemical characteristics of high concentrations of CO2 and He, high 3He/4He-40Ar/36Ar ratio system and high δ13Coo2 ratios (the mainfrequency, -3.4‰-4.6‰), showing no difference from the tectonic framework of the area. In the area, thetectonic environment is a rift formed as a result of diapiric mantle injection and crust thinning to form graben-type basins and lithospheric fractures. The mantle-derived volcanic rocks and inclusions are well-developed and a high geothermal zone (mantlesource) exists in the area. The characteristics of the three components (solid, liquid and gas) of mantle, concentrated all over the same tectonic space zone, show that the rift system is of a good tectonic environment or passage for mantle degassing and gas migration. The main types of the gas pools are volcano,
文摘TIANCHI volcano,Changbaishan Mountains isthe largest modern active volcano in East Chi-na.Many times strong volcanic erupting activ-ities occurred in the Cenozoic Era.The vol-canic activities have revived again in the Re-cent.Field investigation results show thatthere are a lot of hydrothermal anomaly out-
