This paper describes in detail the method of separating Rb and Sr from black shale samples by using cation exchange resin 71-616×20, experimental conditions, and the procedure of preparing samples for Rb-Sr isoto...This paper describes in detail the method of separating Rb and Sr from black shale samples by using cation exchange resin 71-616×20, experimental conditions, and the procedure of preparing samples for Rb-Sr isotopic analysis by mass-spectrometry. Reported in this paper are also several groups of Rb-Sr isochron dates.展开更多
Chemical and isotopic compositions of He, Ar, CH4(δ13C) of hot spring gas in Lancang and Batang earthquake regions show that the concentrations of He , H2 , non-atmospheric sourced N2 and 3He/4He value are closely re...Chemical and isotopic compositions of He, Ar, CH4(δ13C) of hot spring gas in Lancang and Batang earthquake regions show that the concentrations of He , H2 , non-atmospheric sourced N2 and 3He/4He value are closely related to seismic activity. During earthquake activity, gas release is related to the dilation that rocks take on under stress action. Earthquake magnitude (energy) between the two seismic regions suggests that the amount of released gas from rocks increases significantly with the increase of magnitude and energy. As indicators of earthquake prediction, the following parameters of gases from hot spring are effective: He, 3He/4He, H2 and N2B/N2total.展开更多
文摘This paper describes in detail the method of separating Rb and Sr from black shale samples by using cation exchange resin 71-616×20, experimental conditions, and the procedure of preparing samples for Rb-Sr isotopic analysis by mass-spectrometry. Reported in this paper are also several groups of Rb-Sr isochron dates.
基金Project supported by the National Natural Science Foundation of China.
文摘Chemical and isotopic compositions of He, Ar, CH4(δ13C) of hot spring gas in Lancang and Batang earthquake regions show that the concentrations of He , H2 , non-atmospheric sourced N2 and 3He/4He value are closely related to seismic activity. During earthquake activity, gas release is related to the dilation that rocks take on under stress action. Earthquake magnitude (energy) between the two seismic regions suggests that the amount of released gas from rocks increases significantly with the increase of magnitude and energy. As indicators of earthquake prediction, the following parameters of gases from hot spring are effective: He, 3He/4He, H2 and N2B/N2total.