Econ. Environ. Geol. 2010; 43(3): 211-222

Published online June 30, 2010

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Preliminary Experimental Result for Clarifying Sr Isotope Behaviour of Water due to Water-Rock Interaction

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

sgl@kigam.re.kr

Received: February 9, 2010; Accepted: June 5, 2010

Abstract

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

Article

Econ. Environ. Geol. 2010; 43(3): 211-222

Published online June 30, 2010

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Preliminary Experimental Result for Clarifying Sr Isotope Behaviour of Water due to Water-Rock Interaction

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

sgl@kigam.re.kr

Received: February 9, 2010; Accepted: June 5, 2010

Abstract

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

    KSEEG
    Jun 30, 2024 Vol.57 No.3, pp. 281~352

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