The boron isotope systematics of Icelandic geothermal waters: 1. Meteoric water charged systems
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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 δ11B 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 δ11B 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.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The boron isotope systematics of Icelandic geothermal waters: 1. Meteoric water charged systems |
| Series title | Geochimica et Cosmochimica Acta |
| DOI | 10.1016/S0016-7037(99)00300-2 |
| Volume | 64 |
| Issue | 4 |
| Year Published | 2000 |
| Language | English |
| Publisher | Elsevier |
| Description | 7 p. |
| First page | 579 |
| Last page | 585 |
| Country | Iceland |