Hydrochemistry and isotopic characteristics of non-volcanic hot springs around the Miocene Kofu granitic complex surrounding the Kofu Basin in the South Fossa Magna region, central Honshu, Japan

Yaguchi, Muga; Muramatsu, Yukiko; Chiba, Hitoshi; Okumura, Fumiaki; Ohba, Takayoshi; Yamamuro, Masumi

doi:10.2343/geochemj.2.0310

Cited by 13 publications

(7 citation statements)

References 21 publications

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“…Snow depth was found to increase with altitude and decrease from north-west to south-east. Therefore, oxygen and hydrogen isotopic ratios for snow increased with precipitation owing to precipitation effect for isotope [6]. In winter, precipitation depended on cloud from the Japan Sea so isotopic ratios were thought to increase from north-west to south-east.…”

Section: Study Area and Methodsmentioning

confidence: 99%

“…It is necessary to evaluate the influence of pumping up geothermal water on hot spring temperature and quantity around geothermal boreholes [4]. In particular, hydrogen and oxygen isotopic ratios were very useful in determining recharge or water sources of hot spring and geothermal water [4], [5], [6]. As a result, a hydrological investigation was performed to clarify the influence of geothermal development on Jyozankei hot spring.…”

Section: Introductionmentioning

confidence: 99%

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Geothermal and Hot Spring Water Origin Determination Using Oxygen and Hydrogen Stable Isotope in the Toyohirakawa Catchment, Hokkaido, Japan

Hiroyuki¹,

Kanbara²,

Kawabata³

2017

GEOMATE

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Jyozankei hot spring located near Sapporo City in Hokkaido is famous for many visitors and hot spring quality in Japan. Ground temperatures of 220 °C were reached in the Toyoha Mine10 km west of Jyozankei hot spring where several boreholes less than 2000 m in depth for investigating geothermal water were drilled. Subsequently, a hydrological investigation to clarify the influence of geothermal development on Jyozankei hot Spring was performed. Snow, river, well, spring, hot spring and the geothermal borehole waters in the Toyohirakawa catchment including Jyozankei hot spring were sampled and oxygen and hydrogen stable isotopes of water were analyzed to determine water origin for hot spring and geothermal water. As a result, Jyozankei hot spring and the borehole waters were thought to arise from mixed waters of magmatic and surface waters. Borehole water, from less than 2000 m in depth, was 10 to 30 % of the magmatic water and Jyozankei hot spring water was less than 10 % of the magmatic water. Surface water was recharged at the upstream of the Toyohirakawa catchment, with snow from the upper stream of the northwest catchment being an important resource of surface water for both Jyozankei hot spring water and geothermal water from the boreholes.

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Section: Study Area and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geothermal and Hot Spring Water Origin Determination Using Oxygen and Hydrogen Stable Isotope in the Toyohirakawa Catchment, Hokkaido, Japan

Hiroyuki¹,

Kanbara²,

Kawabata³

2017

GEOMATE

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“…Moreover, the data point S1 plots close to the 1 : 1 line in Figure 6(a), indicating that the quality of the water sample of S1 is influenced by the weathering of albite. The precipitation rich in CO 2 infiltrates into the deep metamorphic rocks and reacts with the albite as follows [5]:…”

Section: Ions In Springmentioning

confidence: 99%

“…where X is the proportion of the cold water in mixing, H c is the enthalpy of cold water, H h is the enthalpy of deep hot water, H s is the enthalpy of mixed hot water, SiO 2c is the silica content of cold water, SiO 2h is the silica content of deep hot water, and SiO 2s is the silica content of mixed hot water. Solve equations (5) and (6) for X at different temperatures and different silica contents of deep hot waters, respectively, and plot the relationship between X and temperature to obtain two curves. The intersection point gives the estimated initial temperature of thermal groundwater component and the proportion of cold water (Figure 13).…”

Section: Mixing Modelsmentioning

confidence: 99%

“…Hershey et al [4] examined the relationships of cations and anions in different combinations to gain information on water quantity and quality of 16 regional springs in the Great Basin in western United States and identified regionally sourced springs that had not been previously recognized. Yaguchi et al [5] analyzed the chemical and isotopic compositions of the hot spring waters around the Miocene Kofu granitic complex surrounding the Kofu Basin in Japan, suggesting that the major ions are controlled by the montmorillonization of plagioclase, cation exchange reaction of Na-montmorillonite and precipitation of calcite, and the SO 4 of springs in granite areas is derived from the oxidation of sulfides while that of springs in volcanic areas is derived from the dissolution of anhydrite. Different types of geothermometers are used to evaluate temperatures for the hydrothermal potentialities of deep reservoirs.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogeochemistry, Geothermometry, and Genesis of the Hot Springs in the Simao Basin in Southwestern China

et al. 2019

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In the Simao Basin in southwest China widely occur red beds of poor permeability. Nevertheless, more than 100 springs exist in the basin, some of which are hot springs with varying temperature. Hot springs contain abundant information on hydrogeochemical processes and groundwater circulation. In this study, hydrochemical and isotopic analyses and mixed models are used to examine the sources of recharge, heat, and solutes of the hot springs to better understand the subsurface processes and formation mechanisms of different hot springs in the basin. Three types of springs are found in the Simao Basin: springs of HCO3-Na type occur in the metamorphic rocks, springs of HCO3-Ca(Mg) and Cl-HCO3-Na-Ca types in the carbonate rocks, and springs of Cl(SO4)-SO4(Cl)-HCO3-Na(Ca) type in the red beds. Data of δ2H and δ18O indicate that the hot springs in the Simao Basin are meteoric in origin. Incongruent dissolution is the dominant process affecting the chemical compositions of the spring waters. The hydrochemical constituents of the hot springs in the metamorphic rocks, carbonate rocks, and red beds are influenced by the weathering of albite and the dissolution of carbonate, gypsum, anhydrite, and halite. The geothermal waters are mixed with shallow cold waters in their ascending processes, and the mixing ratios of cold water range from 58% to 94%. Due to the effect of mixing, the reservoir temperatures (51°C-127°C) calculated with the quartz geothermometer are regarded as the minimum reservoir temperatures. More reliable reservoir temperatures (91°C-132°C) are estimated with the fixed-Al method. The following mechanisms contribute to the formation of hot springs in the Simao Basin: the groundwater receives recharge from infiltration of precipitation and undergoes deep circulation, during which groundwater is heated by heat flow and incongruently dissolves the subsurface minerals and emerges in the form of hot springs along the permeable fracture or fault zones.

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Assessment of Microbial Diversity in Hot Springs for Sustainable Industrial Applications

Sadeepa,

Sirisena,

Manage

2024

Microbial Diversity in the Genomic Era

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Hydrochemistry and isotopic characteristics of non-volcanic hot springs around the Miocene Kofu granitic complex surrounding the Kofu Basin in the South Fossa Magna region, central Honshu, Japan

Cited by 13 publications

References 21 publications

Geothermal and Hot Spring Water Origin Determination Using Oxygen and Hydrogen Stable Isotope in the Toyohirakawa Catchment, Hokkaido, Japan

Geothermal and Hot Spring Water Origin Determination Using Oxygen and Hydrogen Stable Isotope in the Toyohirakawa Catchment, Hokkaido, Japan

Hydrogeochemistry, Geothermometry, and Genesis of the Hot Springs in the Simao Basin in Southwestern China

Assessment of Microbial Diversity in Hot Springs for Sustainable Industrial Applications

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