Hekla cold springs (Iceland): Groundwater mixing with magmatic gases

Nils G. Holm, Sigurdur R. Gislason, Erik Sturkell, Peter Torssander*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We have analysed the chemical and stable isotope compositions of four spring waters situated just northwest of the Hekla volcano, where cold water emerges from the base of the lava flows. The stable isotope ratios of water (H, O), dissolved inorganic carbon (C) and sulphate (S) were used to determine whether magmatic gases are mixing with the groundwater. The waters can be characterised as Na-HCO3 type. The results show that deep-seated gases mix with groundwater, substantially affecting the concentration of solutes and the isotopic composition of dissolved carbon and sulphate.

Original languageEnglish
Pages (from-to)180-189
Number of pages10
JournalIsotopes in Environmental and Health Studies
Volume46
Issue number2
DOIs
Publication statusPublished - Jun 2010

Bibliographical note

Funding Information:
Help with chemical and isotope analyses by K. Hajnal and H. Siegmund is gratefully acknowledged. Therese Flaathen did PHREEQC modelling of the waters. We are grateful for help from Rósa Ólafsdóttir with geographic data. Two anonymous reviewers greatly improved the manuscript. This study was funded by the Swedish Research Council, the Swedish National Space Board, the Stockholm University and the Institute of Earth Sciences, and University of Iceland.

Other keywords

  • Carbon-13
  • Groundwater
  • Hekla volcano
  • Hydrogen-2
  • Iceland
  • Isotope ecology
  • Magmatic inputs
  • Oxygen-18
  • Sulphur-34

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