The origin of hypersaline liquid in the quaternary kakkonda granite, sampled from well WD-1a, kakkonda geothermal system, Japan

Kasai, Kaichiro; Sakagawa, Yukihiro; Komatsu, Ryo; Sasaki, Mitsuru; Akaku, Kohei; Uchida, Toshihiro

doi:10.1016/s0375-6505(98)00037-6

Cited by 35 publications

(16 citation statements)

References 6 publications

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“…Saline liquids occur in many volcanic environments and associated magmatic systems (Roedder and Coombs 1967;Solovova et al 1991;Frezzotti 1992;Roedder 1992;Lowenstern 1994;Webster and Rebbert 1998;Kamenetsky et al 1999Kamenetsky et al , 2004Davidson et al 2005;Kamenetsky 2006;Davidson and Kamenetsky 2007). Chloride-and sulfate-enriched, saline liquids have been observed in the products of deep geothermal wells drilled into active volcanic terrains at Kakkonda, Japan (Kasai et al 1998); Mofete, Italy (Guglielminetti 1986); and Nisyros, Greece (Chiodini et al 1993). Evidence of saline liquids has also been observed in FI of some magmatic systems (Cloke and Kessler 1979;Lowenstern 1994).…”

Section: Intensive Properties Of Fl Uids In Volcanic Environmentsmentioning

confidence: 99%

Fluid Immiscibility in Volcanic Environments

Webster

Mandeville

2007

Reviews in Mineralogy and Geochemistry

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INTRODUCTIONVolatile components enter the atmosphere, oceans, and other surface waters through pre-, syn-, and post-eruptive volcanic processes that involve a variety of fl uids. Aluminosilicate-poor fl uids include aqueous or carbonic to sulfi de-, sulfate-, chloride-, fl uoride-, carbonate-, and phosphate-rich compositions in volcanic environments, but other more complex combinations of these constituents may be involved (Giggenbach 1977;Roedder 1984 Roedder , 1992Lowenstern 1995). Other, rare gases and dissolved constituents (e.g., H 2 , N 2 , He, Ar, H 3 BO 3 , Hg, CH 4 and other hydrocarbon compounds, metals, and metalloids) are also present, but in general they are not suffi ciently concentrated to form their own phases or control bulk-fl uid composition and volcanic processes. As a result of their diverse compositions, volcanic fl uids ranging from vapor to liquid exhibit widely different densities and show strong distinctions in heat capacity, dielectric behavior, viscosity, and other chemical and physical characteristics (Geiger et al. 2006a). The density of a saline liquid in the system NaCl-H 2 O at 50 MPa and 800 °C, for example, is more than 7 times that of the coexisting aqueous vapor (e.g., 0.2 gm/cm 3 ) (Henley and McNabb 1978).Multiple fl uids move, mix, and/or unmix in magma chambers and volcanic conduits, in the root zone of fumaroles, and in the convective hydrothermal systems that are ubiquitous to volcanic environments. Hydrothermal systems are typically centered on magmatic intrusions and may include crater lakes at the top of eruptive conduits. Hydrothermal processes involving two or more fl uid phases operate through a variety of geologically relevant, shallowcrustal pressure-temperature-composition conditions. Volcanic fl uids occur at supersolidus to subsolidus conditions, meaning that the dense aluminosilicate melt that is common to volcanism may or may not be present. This chapter addresses the evidence for and occurrence of two or more low-density, aluminosilicate-poor fl uids in volcanic and related environments. It also describes the role of multiple fl uids in the chemical and physical processes that occur in these environments-even though many aspects of volcanic processes are still poorly understood. BACKGROUND

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Section: Intensive Properties Of Fl Uids In Volcanic Environmentsmentioning

confidence: 99%

Fluid Immiscibility in Volcanic Environments

Webster

Mandeville

2007

Reviews in Mineralogy and Geochemistry

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“…Well WD-1 encountered the intrusion at 2.8 km depth and was drilled 0.87 km into the granite, where temperatures exceeded 500°C and hypersaline magmatic fl uids were sampled (Fig. 4;Ikeuchi et al 1998;Kasai et al 1998). The Kakkondo granitoid is considered to be the heat source for the extensive biotite-grade contact aureole and for the present-day hydrothermal activity (Doi et al 1991).…”

Section: Japanmentioning

confidence: 99%

Epidote in Geothermal Systems

Bird

Spieler

2004

Reviews in Mineralogy and Geochemistry

109

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“…Ground water sampled from a depth of ca. 3000 m in the Kakkonda pluton still maintains high salinity (around 390 000 ppm; Kasai et al 1998), suggesting little mixing with modern rain water. This is an analogue of the transition depth of Episodes II-III.…”

Section: Fracture Growth Model Of Orogenic Plutonsmentioning

confidence: 99%

Long‐term stability of fracture systems and their behaviour as flow paths in uplifting granitic rocks from the Japanese orogenic field

et al. 2012

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In granitic rocks, fracture networks typically provide pathways for groundwater flow and solute transport that need to be understood to assess the long‐term performance of deep underground storage or disposal facilities such as radioactive waste repositories. However, relatively little is known about the long‐term processes of fracturing and/or the longevity of flow paths (FP) in granitic rocks distributed within orogenic belts. To clarify these issues, Japanese plutons of different ages and in situ fractures in granite at the Mizunami Underground Research Laboratory (MIU) located in central Japan were studied. Detailed structural characterization and geochemical analysis of in situ fracture fillings sampled from a depth of 300 m were carried out to clarify the relationship between fracturing and mineral infilling processes. Different plutons show identical episodes of fracturing and fracture filling, consisting of: brittle tensile fracturing, due to decreasing temperature through the ductile–brittle transition after plutonic intrusion (Stage I); relatively rapid uplifting (ca. a few mm/year) accompanied by hydrothermal water circulation, which produced uncrushed layered mineral fillings (Stage II); and a period of low‐temperature meteoric water circulation following exposure after uplift (Stage III). The parageneses of carbonate mineral fracture fillings and their carbon isotopic compositions (14C, δ13C) show that there were distinct episodes of carbonate mineral precipitation during the rapid uplifting of a pluton. The carbonate minerals that formed during each episode incorporated carbon from a distinct source. The evolution of fillings identified here enables development of a specific model of fracturing and persistence of fluid‐conducting systems in the plutons of the orogenic field.

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The origin of hypersaline liquid in the quaternary kakkonda granite, sampled from well WD-1a, kakkonda geothermal system, Japan

Cited by 35 publications

References 6 publications

Fluid Immiscibility in Volcanic Environments

Fluid Immiscibility in Volcanic Environments

Epidote in Geothermal Systems

Long‐term stability of fracture systems and their behaviour as flow paths in uplifting granitic rocks from the Japanese orogenic field

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