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claudia-bouman
Team TFS
Team TFS
1) Department of Earth Science, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands, 2) Faculty of Earth and Life Sciences, VU University, 1081 HV Amsterdam, Netherlands, 3) Institute of Earth Sciences, University of Iceland, Sturlugata 7, 101 Reykjavík, Iceland
Geochimica et Cosmochimica Acta (2015), V164, pp403–427, doi: 10.1016/j.gca.2015.05.043
Silicon isotope fractionation during silica precipitation from hot-spring waters: Evidence from the Geysir geothermal field, Iceland
Sonja Geilert (1), Pieter Z. Vroon (2), Nicole S. Keller (3), Snorri Gudbrandsson (3), Andri Stefánsson (3), Manfred J. van Bergen (1)
This study aims to explore the extent and controls of silicon isotope fractionation in hot spring systems of the Geysir geothermal area (Iceland), a setting where sinter deposits are actively formed. The δ30Si values of dissolved silica measured in the spring water and sampling sites along outflowing streams, covering a temperature range between 20 and 100 °C, were relatively constant around +0.2‰, whereas the δ30Si signatures of associated opaline sinters from the streambeds were between −0.1‰ and −4.0‰, becoming progressively more negative in the downstream parts of the aprons.
  • MC-ICPMS
  • Neptune
  • Si isotopes
  • Hot spring
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