δD values of escaped H2 from hot springs at the Tengchong Rehai geothermal area and its origin
Here we give the · values of escaped H2 from hot springs at the Tengchong Rehai and adjacent regions, and deal with a genetic correlation between the increment H2 in escaped gases from middle-shallow reservoirs and the H2S, CH4 derived from deep sources. Isotopic compositions of H2 indicate that the generation of increment H2 may be related to recent strong activity of N-W trending fault at the Rehai area. Trace monitoring the H2 release could be significant in order to keep watch on present activity ofthat fault.
KeywordsRehai geothermal area hydrogen stable isotopic composition
- 1.Kita, I., Matsuo, S., Wakita, H. et al., D÷H ratios of H2 in soil gases as an indicator of fault movements, Geochem. Jour., 1980, 14: 317.Google Scholar
- 4.Shangguan, Z. G., Structure of geothermal reservoirs and the temperature of mantle-derived magma hot source in the Rehai area, Tengchong, Acta Petrologica Sinica (in Chinese), 2000, 16: 83.Google Scholar
- 5.Dai, J. X., Pei, X. G., Qi, H. F., Natural Gas Geology in China (in Chinese), Beijing: Petroleum Industry Press, 1992, 56–59.Google Scholar
- 9.Liu, B., The evolution of deep-seated methane and origin of the carbon dioxide, Petroleum Experiment and Geology (in Chinese), 1982, 11: 167.Google Scholar
- 10.Yang, Z. E., Ying, S. H., Lin, C. Y. et al., Characteristics of fault rock and their potential evidences for seismic events, Seismology and Geology (in Chinese), 1981, 3(4): 1.Google Scholar