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The boron isotope systematics of Icelandic geothermal waters: 1. Meteoric water charged systems

The boron isotope systematics of Icelandic geothermal waters: 1. Meteoric water charged systems
The boron isotope systematics of Icelandic geothermal waters: 1. Meteoric water charged systems
We have measured the boron isotope composition and boron and chloride concentrations of 27 Icelandic geothermal fluids from both high- and low-temperature systems. The ?11B values range from -6.7‰ in the Krafla system, to +25.0‰ in a warm spring from the Southern Lowlands. In addition, we have also determined the ?11B values of basaltic glass from Nesjavellir (-5.3 ± 1.4‰) and travertine from Snaefellsnes (-22 ± 0.5‰). The B isotope and Cl/B systematics of the high-temperature systems are dominated by the composition of the local basalts. The lower temperature systems show evidence for mixing with B and Cl of a marine origin, together with some uptake of B into secondary mineral phases. The data from the Snaefellsnes geothermal system indicate that the fluids have undergone interaction with basalts that have undergone significant low-temperature alteration by seawater.
0016-7037
579-585
Aggarwal, J.K.
a11b1929-2e9b-4d7c-9278-0666e407e1ee
Palmer, M.R.
d2e60e81-5d6e-4ddb-a243-602537286080
Bullen, T.D.
b0c08d55-e8ea-4b3c-be42-9a358e3108e7
Arnórsson, S.
2d2ea7f5-1be0-4a93-a7b8-1db58736ff36
Ragnarsdóttir, K.V.
be2ba518-4773-4fd9-83c5-40a19efd0885
Aggarwal, J.K.
a11b1929-2e9b-4d7c-9278-0666e407e1ee
Palmer, M.R.
d2e60e81-5d6e-4ddb-a243-602537286080
Bullen, T.D.
b0c08d55-e8ea-4b3c-be42-9a358e3108e7
Arnórsson, S.
2d2ea7f5-1be0-4a93-a7b8-1db58736ff36
Ragnarsdóttir, K.V.
be2ba518-4773-4fd9-83c5-40a19efd0885

Aggarwal, J.K., Palmer, M.R., Bullen, T.D., Arnórsson, S. and Ragnarsdóttir, K.V. (2000) The boron isotope systematics of Icelandic geothermal waters: 1. Meteoric water charged systems. Geochimica et Cosmochimica Acta, 64 (4), 579-585. (doi:10.1016/S0016-7037(99)00300-2).

Record type: Article

Abstract

We have measured the boron isotope composition and boron and chloride concentrations of 27 Icelandic geothermal fluids from both high- and low-temperature systems. The ?11B values range from -6.7‰ in the Krafla system, to +25.0‰ in a warm spring from the Southern Lowlands. In addition, we have also determined the ?11B values of basaltic glass from Nesjavellir (-5.3 ± 1.4‰) and travertine from Snaefellsnes (-22 ± 0.5‰). The B isotope and Cl/B systematics of the high-temperature systems are dominated by the composition of the local basalts. The lower temperature systems show evidence for mixing with B and Cl of a marine origin, together with some uptake of B into secondary mineral phases. The data from the Snaefellsnes geothermal system indicate that the fluids have undergone interaction with basalts that have undergone significant low-temperature alteration by seawater.

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Published date: 2000

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Local EPrints ID: 1250
URI: https://eprints.soton.ac.uk/id/eprint/1250
ISSN: 0016-7037
PURE UUID: 8bd7e215-f7ba-4655-8a99-563bccc320ac

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Date deposited: 07 Apr 2004
Last modified: 17 Jul 2017 17:17

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Author: J.K. Aggarwal
Author: M.R. Palmer
Author: T.D. Bullen
Author: S. Arnórsson
Author: K.V. Ragnarsdóttir

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