Hiroshi Satake

TL;DR: Gases occluded in fracture zones of active faults are characterized by a high concentration of CO 2 and/or CO 2 in the lithofacies which the fault cuts Carbon dioxide concentration in sediments fluctuates with temperature as discussed by the authors.

TL;DR: More than 140 thermal waters of Japan were studied isotopically and chemically as discussed by the authors, and the isotopic values of these brines vary proportionally with chloride concentration irrespective of temperature, carbonate concentration or locality.

TL;DR: Fluor-apatite and micas in the granites were identified as the main provenance of fluoride in the groundwater through water-rock interactions in an alkaline medium and the optimal fluoride dose in drinking water of the study area should be 0.7 mg/l, and could be adjusted downward due to the high consumption rate of groundwater, especially during drier periods.

TL;DR: In this paper, the evolution of CO2 in Lakes Monoun and Nyos (Cameroon) before and during controlled degassing is described using results of regular monitoring obtained during the last 21 years.

TL;DR: In this article, the authors evaluated the groundwater susceptibility to contamination and the basin's stage of salinization in MayoTsanaga River Basin using isotopically analyzed groundwater from crystalline and detrital sediment aquifers, together with rain, dams, springs, and rivers.