Abstract
The baseline methane for shallow groundwater can provide an important evidence to interpret possible methane stray associated with shale gas exploration. This study investigated and traced methane content and its origin of shallow groundwater in a karst aquifer in the Fuling shale gas block, SW China. The results show that methane contents of shallow groundwater are all less than 0.01 mg L−1 and volumetric content in dissolved gas ranges from not detected to 0.0064%. The δ13C-CH4 ranges from −74.4 to −49.1‰, suggesting biogenic origin. For the first time, the δ13C-CH4 and 3He/4He end-numbers were determined.
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Acknowledgements
This work is supported by the “Strategic Priority Research Program (B)” of the Chinese Academy of Sciences (Grant XDB10030603) and National Natural Science Foundation of China (Grant 41672254).
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Huang, T., Pang, Z., Tian, J. et al. Methane content and isotopic composition of shallow groundwater: implications for environmental monitoring related to shale gas exploitation. J Radioanal Nucl Chem 312, 577–585 (2017). https://doi.org/10.1007/s10967-017-5243-9
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DOI: https://doi.org/10.1007/s10967-017-5243-9