Econ. Environ. Geol. 2010; 43(3): 211-222
Published online June 30, 2010
© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY
Correspondence to : Seung-Gu Lee
A batch experiment was carried out to investigate a variation of Sr concentration and 87Sr/86Sr ratio in the solution by water-rock interaction. The experiments were conducted at room temperature using two kinds of granites(biotite granite and garnet-bearing granite), de-ionized water. surface water. Water/rock ratio was 1:1. For comparison, we also performed another experiment under water/rock condition of 10:1. Then, the concentration of the cations and anions in the solutions showed severe variation during water/rock interaction. However, after sometime, the 87Sr/86Sr ratio of the solution moved to the 87Sr/86Sr ratio of the rocks and showed relatively constant value. This suggests that the 87Sr/86Sr ratio between water and rock becomes to be stable faster than the elemental equilibration of the element in the solution, and is not affected by interaction condition. Therefore, 87Sr/86Sr ratio of the groundwater may be useful in calculating the mixing ratio between different aquifer.
Keywords
Sr isotope, water-rock interaction, batch experiment
Econ. Environ. Geol. 2010; 43(3): 211-222
Published online June 30, 2010
Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.
Seung-Gu Lee1* and Jeong Chan Kim2
1Geological Research Division, Korea Institute of Geoscience and Mineral Resources, Korea
2Earth and Environment Research Division, Korea Institute of Geoscience and Mineral Resources, Korea
Correspondence to:
Seung-Gu Lee
A batch experiment was carried out to investigate a variation of Sr concentration and 87Sr/86Sr ratio in the solution by water-rock interaction. The experiments were conducted at room temperature using two kinds of granites(biotite granite and garnet-bearing granite), de-ionized water. surface water. Water/rock ratio was 1:1. For comparison, we also performed another experiment under water/rock condition of 10:1. Then, the concentration of the cations and anions in the solutions showed severe variation during water/rock interaction. However, after sometime, the 87Sr/86Sr ratio of the solution moved to the 87Sr/86Sr ratio of the rocks and showed relatively constant value. This suggests that the 87Sr/86Sr ratio between water and rock becomes to be stable faster than the elemental equilibration of the element in the solution, and is not affected by interaction condition. Therefore, 87Sr/86Sr ratio of the groundwater may be useful in calculating the mixing ratio between different aquifer.
Keywords
Sr isotope, water-rock interaction, batch experiment
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