Strontium isotope systematics used to decipher the origin of groundwaters sampled from granitoids: the Vienne Case (France)

Négrel, Philippe; Casanova, Joël; Aranyossy, Jean-François

doi:10.1016/s0009-2541(00)00414-9

Cited by 108 publications

(63 citation statements)

References 52 publications

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“…Here, the mean chemical composition of the rainfall at Tours over 1.5 years (Grosbois et al, 2000) was used, weighted by the quantity of each rain event. The rain collector was located about 100 km from the study site, at the same distance from the ocean and under the same climatic influence (Grosbois et al, 2000;Négrel et al, 2001).…”

Section: Correction For Atmospheric Inputmentioning

confidence: 99%

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Variability of⁸⁷Sr/⁸⁶Sr in water draining granite revealed after a double correction for atmospheric and anthropogenic inputs

Petelet‐Giraud

Négrel

Casanova

2003

Hydrological Sciences Journal

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In a geochemical characterization of surface waters draining granites of the Vienne district, France, isotopic signatures strictly linked to water-rock interactions were determined by applying a double correction for atmospheric and anthropogenic inputs; the former based on the conservative behaviour of Cl and the latter based on the Sr concentrations and isotopic signatures, which are the only variables with clearly identifiable characteristics. The double-correction concept was validated by comparing the results with the theoretical Sr isotopic signature of water in equilibrium with the parent rock. The weathering model is based on the preferential dissolution of the three main Sr-bearing mineral phases: plagioclase, potassium feldspar and biotite. The Sr isotopic signatures of the waters are in good agreement with the calculated ones. The relative scattering observed for waters draining the same plutonic intrusion can be explained by water-rock interactions within different layers of the weathering profile. Résumé Cette étude présente la caractérisation géochimique d'eaux de surface drainant des granitoïdes, dans la région de Vienne, en France. L'identification de la signature isotopique des eaux uniquement liée à l'interaction eau roche a été appréhendée par une double correction des apports atmosphériques et anthropiques. La correction atmosphérique est basée sur le comportement conservatif du Cl. La correction anthropique n'a été réalisée que sur les signatures isotopiques et les teneurs en Sr, qui sont les seules variables dont les caractéristiques sont clairement identifiables. Ce concept de double correction a été validé par comparaison avec la signature isotopique en Sr théorique d'une eau en équilibre avec une roche mère. Le modèle d'altération utilisé s'appuie sur la dissolution des trois principaux minéraux contenant du Sr (plagioclase, feldspath-K et biotite). Les signatures isotopiques en Sr des eaux sont similaires à celles issues du calcul. La relative dispersion des signatures au sein d'un même batholite peut s'expliquer par des interactions eau-roche dans différents niveaux du profil d'altération. Key words

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Section: Correction For Atmospheric Inputmentioning

confidence: 99%

“…Previous studies in the Vienne district (western France) focused mainly on deep-fluid geochemistry in order to identify water origin and understand groundwater circulations in the granite batholith (Michelot, 1997;Casanova et al, 2001;Négrel et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Variability of⁸⁷Sr/⁸⁶Sr in water draining granite revealed after a double correction for atmospheric and anthropogenic inputs

Petelet‐Giraud

Négrel

Casanova

2003

Hydrological Sciences Journal

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“…For example, Negrel et al (2001) found that rainwater varied between 0.70901 and 0.71060 in the Massif Central region of SE France but had a mean value of 0.70943 weighted by % of rainfall.…”

Section: Introductionmentioning

confidence: 99%

Resolving archaeological populations with Sr-isotope mixing models

Montgomery

Evans

Cooper

2007

Applied Geochemistry

153

147

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) 'Resolving archaeological populations with Sr-isotope mixing models.', Applied geochemistry., 22 (7). pp. 1502-1514. Further information on publisher's website:http://dx.doi.org/10.1016/j.apgeochem. 2007.02.009 Publisher's copyright statement: NOTICE: this is the author's version of a work that was accepted for publication in Applied geochemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Applied geochemistry, 22 (7), 2007, 10.1016/j.apgeochem.2007.02.009 Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Sr ranges, it is possible to separate two populations based on the structure within the data set.

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“…Tracers such as major ions, stable isotopes, radioactive isotopes, and chlorofluorocarbons have been used to quantify groundwater inflows to rivers (e.g. Ellins et al, 1990;Genereux and Hemond, 1992;Négrel et al, 2001;Stellato et al, 2008;Cartwright et al, 2011Cartwright et al, , 2014Cook, 2013;Bourke et al, 2014a, b). Geochemical tracers only quantify groundwater inflows, and while they are commonly used to determine the distribution of gaining and losing reaches, they do not quantify the magnitude of any groundwater outflows.…”

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Using radon to understand parafluvial flows and the changing locations of groundwater inflows in the Avon River, southeast Australia

Cartwright

Hofmann

2016

Hydrol. Earth Syst. Sci.

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Abstract. Understanding the location and magnitude of groundwater inflows to rivers is important for the protection of riverine ecosystems and the management of connected groundwater and surface water systems. This study utilizes 222 Rn activities and Cl concentrations in the Avon River, southeast Australia, to determine the distribution of groundwater inflows and to understand the importance of parafluvial flow on the 222 Rn budget. The distribution of 222 Rn activities and Cl concentrations implies that the Avon River contains alternating gaining and losing reaches. The location of groundwater inflows changed as a result of major floods in 2011-2013 that caused significant movement of the floodplain sediments. The floodplain of the Avon River comprises unconsolidated coarse-grained sediments with numerous point bars and sediment banks through which significant parafluvial flow is likely. The 222 Rn activities in the Avon River, which are locally up to 3690 Bq m −3 , result from a combination of groundwater inflows and the input of water from the parafluvial zone that has high 222 Rn activities due to 222 Rn emanation from the alluvial sediments. If the high 222 Rn activities were ascribed solely to groundwater inflows, the calculated net groundwater inflows would exceed the measured increase in streamflow along the river by up to 490 % at low streamflows. Uncertainties in the 222 Rn activities of groundwater, the gas transfer coefficient, and the degree of hyporheic exchange cannot explain a discrepancy of this magnitude. The proposed model of parafluvial flow envisages that water enters the alluvial sediments in reaches where the river is losing and subsequently re-enters the river in the gaining reaches with flow paths of tens to hundreds of metres. Parafluvial flow is likely to be important in rivers with coarse-grained alluvial sediments on their floodplains and failure to quantify the input of 222 Rn from parafluvial flow will result in overestimating groundwater inflows to rivers.

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Strontium isotope systematics used to decipher the origin of groundwaters sampled from granitoids: the Vienne Case (France)

Cited by 108 publications

References 52 publications

Variability of⁸⁷Sr/⁸⁶Sr in water draining granite revealed after a double correction for atmospheric and anthropogenic inputs

Variability of⁸⁷Sr/⁸⁶Sr in water draining granite revealed after a double correction for atmospheric and anthropogenic inputs

Resolving archaeological populations with Sr-isotope mixing models

Using radon to understand parafluvial flows and the changing locations of groundwater inflows in the Avon River, southeast Australia

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Strontium isotope systematics used to decipher the origin of groundwaters sampled from granitoids: the Vienne Case (France)

Cited by 108 publications

References 52 publications

Variability of87Sr/86Sr in water draining granite revealed after a double correction for atmospheric and anthropogenic inputs

Variability of87Sr/86Sr in water draining granite revealed after a double correction for atmospheric and anthropogenic inputs

Resolving archaeological populations with Sr-isotope mixing models

Using radon to understand parafluvial flows and the changing locations of groundwater inflows in the Avon River, southeast Australia

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Variability of⁸⁷Sr/⁸⁶Sr in water draining granite revealed after a double correction for atmospheric and anthropogenic inputs

Variability of⁸⁷Sr/⁸⁶Sr in water draining granite revealed after a double correction for atmospheric and anthropogenic inputs