E3S Web Conf.
Volume 98, 201916th International Symposium on Water-Rock Interaction (WRI-16) and 13th International Symposium on Applied Isotope Geochemistry (1st IAGC International Conference)
|Number of page(s)||5|
|Section||Geological Evolution of Water-Rock System: Mechanisms, Processes, Factors, Stages. The Session Dedicated to Stepan Shvartsev’s Memory|
|Published online||07 June 2019|
The geochemistry of water and gas phases from high pCO2 sparkling springs within the northern Sikhote-Alin ridge region (Russian Far East)
Lomonosov Moscow State University, Faculty of Geology, Moscow, Russia
2 Far East Geological Institute, FEB RAS, Vladivostok, Russia
3 Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology
4 Japan Agency for Marine-Earth Science and Technology
5 Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Japan
6 Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, Japan
7 Earthquake Research Institute, the University of Tokyo, Japan
8 Geological Institute, RAS, Moscow, Russia
* Corresponding author: email@example.com
Two types of cold CO2 rich groundwaters are located within the northern part of the Sikhote-Alin ridge: the first type is a Ca–Mg–HCO3 water with low TDS content (≤ 1.7 g/l) and high concentrations of Fe2+, Mn2+, Ba2+, and SiO2, whilst the second type is a Na–HCO3 water with a high TDS content (≈ 14 g/l) and elevated concentrations of Li+, Btot, Sr2+, Br–, and I–. A notable feature of these waters is a predominance of CO2 in the gas phase (up to 99 vol. %) and low contents of other gases (CH4, N2, O2, etc.). The origins of both water types can be identified on the basis of water (δD, δ18O) and gas (δ13C, 3He/4He, 4He/20Ne) isotopic compositions considered in the context of the geology and hydrology of the region.
© The Authors, published by EDP Sciences, 2019
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