Long-term Investigation of Sr- Isotope and Rare Earth Element Fractionation Processes Within Three Major Aquifers in the Äspö Hard Rock Laboratory (Sweden)

Manussawee Hengsuwan, Christine Marcelle Heim, Klaus Simon, Bent T. Klaus

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The 450 m deep Äspö Hard Rock Laboratory (Äspö HRL) provides a unique opportunity to access different aquifer systems within the Precambrian granodioritic basement of the Baltic Shield. In this study, emphasis will be placed on systematic variations of the isotopic and chemical composition including fractionation patterns of rare earth elements (REE) of three different aquifers. The aim is to identify end-member groundwater compositions and increase the knowledge and understanding of the groundwater evolution, and water rock interaction, parameters which are important for the subsurface microbial activity in the Äspö HRL. Groundwaters at the shallow and intermediate aquifers were influenced most from Baltic Sea water and meteoric water. The analyses of Sr-data and REE show especially long-term groundwater-rock interaction and δ18O values indicate the presence of glacial meltwater in the deep aquifer. During the 5 years of investigation, significant chemical changes caused by internal mixing processes or present microbial activity were not observed.

Original languageEnglish (US)
Pages (from-to)243-254
Number of pages12
JournalGeomicrobiology Journal
Volume32
Issue number3-4
DOIs
StatePublished - Mar 16 2015

Fingerprint

Groundwater
hard rock
Fractionation
Rare earth elements
Aquifers
Sweden
Isotopes
rare earth element
fractionation
Rocks
aquifer
isotope
groundwater
microbial activity
Water
water-rock interaction
meteoric water
Chemical analysis
meltwater
shield

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Environmental Chemistry
  • Environmental Science(all)
  • Earth and Planetary Sciences (miscellaneous)

Cite this

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title = "Long-term Investigation of Sr- Isotope and Rare Earth Element Fractionation Processes Within Three Major Aquifers in the {\"A}sp{\"o} Hard Rock Laboratory (Sweden)",
abstract = "The 450 m deep {\"A}sp{\"o} Hard Rock Laboratory ({\"A}sp{\"o} HRL) provides a unique opportunity to access different aquifer systems within the Precambrian granodioritic basement of the Baltic Shield. In this study, emphasis will be placed on systematic variations of the isotopic and chemical composition including fractionation patterns of rare earth elements (REE) of three different aquifers. The aim is to identify end-member groundwater compositions and increase the knowledge and understanding of the groundwater evolution, and water rock interaction, parameters which are important for the subsurface microbial activity in the {\"A}sp{\"o} HRL. Groundwaters at the shallow and intermediate aquifers were influenced most from Baltic Sea water and meteoric water. The analyses of Sr-data and REE show especially long-term groundwater-rock interaction and δ18O values indicate the presence of glacial meltwater in the deep aquifer. During the 5 years of investigation, significant chemical changes caused by internal mixing processes or present microbial activity were not observed.",
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Long-term Investigation of Sr- Isotope and Rare Earth Element Fractionation Processes Within Three Major Aquifers in the Äspö Hard Rock Laboratory (Sweden). / Hengsuwan, Manussawee; Heim, Christine Marcelle; Simon, Klaus; Klaus, Bent T.

In: Geomicrobiology Journal, Vol. 32, No. 3-4, 16.03.2015, p. 243-254.

Research output: Contribution to journalArticle

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