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

• We have analysed the chemical and stable isotope compositions of four springwaters 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.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences (hsv//eng)

Keyword

Hekla volcano

Iceland

groundwater

magmatic inputs

carbon-13

isotope ecology

hydrogen-2

oxygen-18

sulphur-34

Earth sciences

Geovetenskap

Publication and Content Type

ref (subject category)

art (subject category)