The δD, δ18O values of the hot springs are always more negative than those of the local cold springs. The main cause for the ocrurrence is physically isotope fractionation during the deep circulating process of the ...The δD, δ18O values of the hot springs are always more negative than those of the local cold springs. The main cause for the ocrurrence is physically isotope fractionation during the deep circulating process of the groundwater. The relational expression between the δD, δ18O values and the maximum circulating depths of the groundwaters is given. The gases escaped from the geothermal fluid are mostly crust-derived gases in the studied area. The compressive structure of the Tanlu fault could extend to the deep crust, and basically stop the ascent of deep-seated gases towards the surface.展开更多
文摘The δD, δ18O values of the hot springs are always more negative than those of the local cold springs. The main cause for the ocrurrence is physically isotope fractionation during the deep circulating process of the groundwater. The relational expression between the δD, δ18O values and the maximum circulating depths of the groundwaters is given. The gases escaped from the geothermal fluid are mostly crust-derived gases in the studied area. The compressive structure of the Tanlu fault could extend to the deep crust, and basically stop the ascent of deep-seated gases towards the surface.
