⁸⁷Sr/⁸⁶Sr Ratios in Shallow and Deep Aquifers from the Southern Upper Rhine Graben, Germany

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• 作者：Gerhard Schmidt^a ; ^{Gerhard.Schmidt@geow.uni-heidelberg.de} ; Sami Al Najem^a ; Margot Isenbeck-Schr&ouml ; ter^a ; Florian Freundt^b ; Michael Kraml^c ; Werner Aeschbach^b
• 关键词：Rhine Graben ; Potash deposits ; Mining dumps ; Groundwater salinisation ; Strontium isotopic ratios
• 刊名：Procedia Earth and Planetary Science
• 出版年：2017
• 出版时间：2017
• 年：2017
• 卷：17
• 期：Complete
• 页码：626-629
• 全文大小：393 K
• 卷排序：17

文摘

The present 87Sr/86Sr isotopic study of the alluvial aquifer in the southern part of the Upper Rhine valley was undertaken in the framework of a multidisciplinary hydrogeochemical research project searching for cost-effective geochemical methods in hydrogeothermal energy exploration. The aim is to identify possible imprints of deep fluids in shallow aquifers using 87Sr/86Sr ratios as tracer. Strontium ratios and Sr contents of Quaternary groundwater (N=17) range from 0.70852 to 0.71005 and 0.28 to 0.92 mg/l, respectively. Groundwater from a Tertiary deep aquifer has an unexpected low 87Sr/86Sr ratio of 0.70855 and a high Sr content of 5.14 mg/l. 87Sr/86Sr ratios of Quaternary groundwater samples are in the range of Oligocene potash deposits and salt-bearing mining dumps. Hints for ascending deep fluids in shallow aquifers are not found.