Radioelements, radiogenic helium and age relationships for groundwaters from the granites at Stripa, Sweden

Andrews, John N.; Giles, I.S; Kay, Robert L.; Lee, D.J; Osmond, J.K.; Cowart, James B.; Fritz, P.; Barker, James; Gale, J.E.

doi:10.1016/0016-7037(82)90312-x

Cited by 122 publications

(36 citation statements)

References 12 publications

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“…Fracture surface areas where estimated from data in Lore et al (2001). An independent estimate of plagioclase surface areas was made using the evolution of the U-series isotope ratio of the fluid following Andrews et al (1982), assuming that plagioclase is the primary U hosting mineral. 5.4.2.1.…”

Section: Mineral Surface Areamentioning

confidence: 99%

Kinetics of CO2–fluid–rock reactions in a basalt aquifer, Soda Springs, Idaho

Maskell

Kampman

Chapman

et al. 2015

Applied Geochemistry

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a b s t r a c tThe dissolution of silicate minerals by CO 2 -rich fluids and the subsequent precipitation of CO 2 as carbonate minerals represent a means of permanently storing anthropogenic CO 2 waste products in a solid and secure form. Modelling the progression of these reactions is hindered by our poor understanding of the rates of mineral dissolution-precipitation reactions and mineral surface properties in natural systems. This study evaluates the chemical evolution of groundwater flowing through a basalt aquifer, which forms part of the leaking CO 2 -charged system of the Blackfoot Volcanic Field in south-eastern Idaho, USA. Reaction progress is modelled using changes in groundwater chemistry by inverse mass balance techniques. The CO 2 -promoted fluid-mineral reactions include the dissolution of primary plagioclase, orthoclase, pyroxene and gypsum which is balanced by the precipitation of secondary albite, calcite, zeolite, kaolinite and silica. Mineral mole transfers and groundwater flow rates estimated from hydraulic head data are used to determine the kinetics of plagioclase and orthoclase feldspar dissolution. Plagioclase surface area measurements were determined using the evolution of the U-series isotope ratios in the groundwater and are compared to published surface area measurements. Calculated rates of dissolution for plagioclase range from 2.4 Â 10 À12 to 4.6 Â 10 À16 mol/m 2 /s and orthoclase from 2.0 Â 10 À13 to 6.8 Â 10 À16 mol/m 2 /s respectively. These feldspar reaction rates, correlate with the degree of mineral-fluid disequilibrium and are similar to the dissolution rates for these mineral measured in other natural CO 2 -charged groundwater systems.

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Section: Mineral Surface Areamentioning

confidence: 99%

Kinetics of CO2–fluid–rock reactions in a basalt aquifer, Soda Springs, Idaho

Maskell

Kampman

Chapman

et al. 2015

Applied Geochemistry

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“…If the release occurs at the rate of U and Th series decay, then measurable amounts of 4 He will accumulate after about 1000 years, and theoretically continue for millions of years. He-4 has thus traditionally been used as a groundwater tracer over a long timescale [Andrews and Lee, 1979;Marine, 1979;Torgersen, 1980;Andrews et al, 1982;Torgersen and Ivey, 1985;Balderer and Lehmann, 1989;Bottomley et al, 1990;Ballentine et al, 1991;Mazor and Bosch, 1991;Stute et al, 1992;Marty et al, 1993]. However, concentrations of 4 He in groundwater that are larger than can be explained by U and Th decay and the water age have been well documented [e.g., Torgersen and Ivey, 1985;Solomon et al, 1996] and previously interpreted as the result of 4 He diffusion from older underlying units (external source).…”

Section: Introductionmentioning

confidence: 99%

Radiogenic helium in shallow groundwater within a clay till, southwestern Ontario

Sheldon

Solomon

Poreda

et al. 2003

Water Resources Research

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[1] Profiles of 4 He in pore water were measured in clay aquitards in SW Ontario. The 4 He distributions are consistent with groundwater velocities that are <6 mm yr À1 , and thus diffusion is the dominant transport mechanism for 4 He. Modeling indicates that the effective diffusion coefficient for 4 He is 6.3 ± 1.6 Â 10 À6 cm 2 s À1 . Furthermore, the profiles are consistent with the internal release of 4 He from aquitard sediments at a rate of 0.03-0.13 mcc(STP) kg À1 yr À1 . These rates are also consistent with laboratory release experiments and, on average, are 600 times greater than the production of 4 He from U/Th decay. Modeling and the ratio of 21 Ne to 4 He within the sediments indicate that although the aquitards were deposited about 13 kA BP, the sediments released >70% of initial 4 He for 50 to 60 kA prior to incorporation into the till.

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“…Conviene destacar los trabajos realizados en Suecia, en lugares como la mina de Stripa (Fritz et al, 1979;Andrews et al, 1982;Gidlund, 1978y Laurent, 1983, Áspo (Almen et al, 1986y Almen et al, 1991 o Klipperas (Laurent, 1986); en Ontario (Canadá) (Bottomley et al, 1984); en Grimsel (Suiza) (Gautschi et al, 1989) y en varios puntos en Finlandia (Ohberg, 1991). Todos ellos han desarrollado sofisticadas técnicas de instrumentación y de muestreo en sondeos profundos, así como laboratorios móviles dotados con equipos capaces de hacer análisis químicos completos de un agua in situ.…”

Section: Introductionunclassified

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Turrero¹,

Gómez²,

García³

1993

Estud. geol.

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RESUMENEl estudio de los posibles emplazamientos de residuos radiactivos en un medio geoló-gico cualquiera en profundidad, requiere la caracterización de los parámetros hidrogeoló-gicos e hidrogeoquímicos que controlan la migración de los radionucleidos hacia la biosfera. Para llevar a cabo esa caracterización se ha desarrollado una metodología que incluye: (1) estudio sistemático y minucioso de sondeos profundos con el fin de seleccionar zonas favorables para el muestreo del agua y su caracterización; (2) sellado de las zonas seleccionadas mediante obturadores; (3) bombeo de agua de la zona aislada, mediante bombas o sistemas de elevación con gas, con el fin de eliminar la contaminación producida por el agua de perforación. El control de la limpieza se realiza mediante el seguimiento de trazadores y la estabilización de los parámetros físico-químicos del agua; (4) muestreo y análisis in situ de agua, gases, partículas, coloides y microorganismos, para 10 cual se ha diseñado una unidad móvil de caracterización hidrogeoquímica (UMCH) que permite determinar in situ los parámetros más sensibles, evitando así los problemas de alteración debidos al transporte de las muestras.Palabras clave: Almacenamiento de residuos, sondeos profundos, hidrogeoquímica, técnicas instrumentales, muestreo in situ, laboratorio móvil. ABSTRACTThe characterisation of the hydrogeochemical parameters controlling the radionuclide migration towards the biosphere implicates the deve10pment of a methodology including instrumentation and equipment for working in deep boreholes, according with the data in which we are more interested. This methodology consists of a systematic and detailled study of the boreholes (studies on the cores, geophysical parameters, hydraulic tests ...) that allows to select zones for water sampling and characterisation. The selected areas are adequately isolated with a double packer system and coupled instrumentation for pumping water (pumps or gas lift systems). The isolated zone is cleaned by pumping, and the tracer concentration, tritium measures or the control of the stabilization of physico-chemical parameters, are good indicators of the representativity of the sample. Water, gases, particles, colloids and microorganisms sampling is made in glove boxes and the analysis are made in a movillaboratory in situ for determining the more sensible parameters, avoiding the sample alterations with the transporto Key words: Radiactive waste repository, deep boreholes, hydrogeochemistry, instrumental techniques, sampling in situ, mobillaboratory. IntroducciónLa caracterización de las condiciones hidrogeoló-gicas e hidrogeoquímicas de las zonas más profundas en un medio geológico dado, forma parte de los estudios sobre la seguridad de los posibles almacenamientos de residuos radiactivos, ya que el agua es el medio más común por el que un elemento radiactivo puede alcanzar la biosfera.Para llevar a cabo estas investigaciones es necesario desarrollar y validar una serie de técnicas que permitan trabajar a grandes profundidades re...

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Radioelements, radiogenic helium and age relationships for groundwaters from the granites at Stripa, Sweden

Cited by 122 publications

References 12 publications

Kinetics of CO2–fluid–rock reactions in a basalt aquifer, Soda Springs, Idaho

Kinetics of CO2–fluid–rock reactions in a basalt aquifer, Soda Springs, Idaho

Radiogenic helium in shallow groundwater within a clay till, southwestern Ontario

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