Modern hot spring geochemistry at the Tanlu fault and Jiaoliao block in eastern China |
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Authors: | Zhiguan Shangguan Jikui Du Wei Zang Jihua Wang Lingchang Kong Songsheng Gao |
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Institution: | (1) State Seismological Bureau, Institute of Geology, 100029 Heijing, China;(2) Seismological Bureau of Shandong Province, 250014 Jinan, China;(3) Seismological Bureau of Liaoning Province, 110031 Shenyang, China |
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Abstract: | 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.
Project supported by the National Natural Science Foundation of China (Grant No. 49373165) |
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Keywords: | Tanlu fault and Jiaoliao block stable isotopic compositions of geothermal water isotopic ratios of escaped rare gases |
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