The influence of water-rock reactions and O isotope exchange with CO2 on water stable isotope composition of CO2 springs in SE Australia

Rūta Karolytė, Gareth Johnson, Sascha Serno, Stuart M. V. Gilfillan

Research output: Contribution to journalArticle

1 Citation (Scopus)
7 Downloads (Pure)

Abstract

Monitoring injected CO2 in CCS sites using oxygen isotopes of water has been demonstrated in field and laboratory experiments. Here, we examine natural CO2-rich springs in the Daylesford-Hepburn region, South East Australia, which show water 18O depletion compared to local precipitation. Geochemical modelling shows that water-rock reactions are unlikely to have a significant effect on the observed δ18O values, which can only be explained by isotopic exchange with CO2. The water δ18O shift can be used for monitoring CO2 impact on shallow groundwater aquifers, provided that there is sufficient CO2 and distinction between water and CO2 δ18O values exists.
Original languageEnglish
Pages (from-to)3832-3839
Number of pages8
JournalEnergy Procedia
Volume114
DOIs
Publication statusPublished - 18 Aug 2017
Event13th Conference on Greenhouse Gas Control Technologies (GHGT) - Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
Duration: 14 Nov 201618 Nov 2016
http://www.ghgt.info/ghgt-13

Fingerprint

Springs (water)
Isotopes
stable isotope
Rocks
isotope
Water
Chemical analysis
rock
Oxygen Isotopes
water
Monitoring
monitoring
Aquifers
oxygen isotope
Groundwater
aquifer
Oxygen
groundwater
modeling
Experiments

Keywords

  • water-rock reactions
  • CCS
  • natural tracers
  • monitoring
  • O isotopes
  • natural analogues

Cite this

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title = "The influence of water-rock reactions and O isotope exchange with CO2 on water stable isotope composition of CO2 springs in SE Australia",
abstract = "Monitoring injected CO2 in CCS sites using oxygen isotopes of water has been demonstrated in field and laboratory experiments. Here, we examine natural CO2-rich springs in the Daylesford-Hepburn region, South East Australia, which show water 18O depletion compared to local precipitation. Geochemical modelling shows that water-rock reactions are unlikely to have a significant effect on the observed δ18O values, which can only be explained by isotopic exchange with CO2. The water δ18O shift can be used for monitoring CO2 impact on shallow groundwater aquifers, provided that there is sufficient CO2 and distinction between water and CO2 δ18O values exists.",
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The influence of water-rock reactions and O isotope exchange with CO2 on water stable isotope composition of CO2 springs in SE Australia. / Karolytė, Rūta; Johnson, Gareth; Serno, Sascha; Gilfillan, Stuart M. V.

In: Energy Procedia, Vol. 114, 18.08.2017, p. 3832-3839.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The influence of water-rock reactions and O isotope exchange with CO2 on water stable isotope composition of CO2 springs in SE Australia

AU - Karolytė, Rūta

AU - Johnson, Gareth

AU - Serno, Sascha

AU - Gilfillan, Stuart M. V.

PY - 2017/8/18

Y1 - 2017/8/18

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AB - Monitoring injected CO2 in CCS sites using oxygen isotopes of water has been demonstrated in field and laboratory experiments. Here, we examine natural CO2-rich springs in the Daylesford-Hepburn region, South East Australia, which show water 18O depletion compared to local precipitation. Geochemical modelling shows that water-rock reactions are unlikely to have a significant effect on the observed δ18O values, which can only be explained by isotopic exchange with CO2. The water δ18O shift can be used for monitoring CO2 impact on shallow groundwater aquifers, provided that there is sufficient CO2 and distinction between water and CO2 δ18O values exists.

KW - water-rock reactions

KW - CCS

KW - natural tracers

KW - monitoring

KW - O isotopes

KW - natural analogues

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JF - Energy Procedia

SN - 1876-6102

ER -