Stable Isotopes of Deep Groundwater in the Xiongxian Geothermal Field

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• 作者：Yanlong Kong^a ; ^{ylkong@mail.iggcas.ac.cn} ; Zhonghe Pang^a ; Jumei Pang^a ; Yingchun Wang^a ; Fengtian Yang^b
• 关键词：stable isotopes ; deep groundwater cycle ; Xiongxian geothermal field ; China
• 刊名：Procedia Earth and Planetary Science
• 出版年：2017
• 出版时间：2017
• 年：2017
• 卷：17
• 期：Complete
• 页码：512-515
• 全文大小：233 K
• 卷排序：17

文摘

Karst groundwater samples were collected in the Xiongxian geothermal field for the δ18O and δ2H data analysis. Both the oxygen (-8.4‰ to -8.6‰) and hydrogen (-72.4‰ to -73.0‰) isotopes were found enriched than the precipitation (-9.4 to -11.7‰ for δ18O and -76‰ to -85‰ for δ2H, respectively) in the late Pleistocene, when the karst groundwater was recharged. The enriched oxygen isotope is attributed to water-dolomite interaction in low-middle temperature geothermal field. The water-dolomite ratio was calculated as 0.3, based on the oxygen isotope exchange. The enriched hydrogen isotope is deduced to be caused by bacterial SO42− reduction.