Redox zonation and organic matter oxidation in palaeogroundwater of glacial origin from the Baltic Artesian Basin

Ordovician-Cambrian aquifer system (O-Cm) in the northern part of the Baltic Artesian Basin (BAB), Estonia, is part of a unique groundwater reservoir where groundwater originating from glacial meltwater recharge from the Scandinavian Ice Sheet is preserved. The distribution of redox zones in the ano...

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Bibliographic Details
Published in:Chemical geology 2018-06, Vol.488, p.149-161
Main Authors: Pärn, Joonas, Affolter, Stéphane, Ivask, Jüri, Johnson, Sean, Kirsimäe, Kalle, Leuenberger, Markus, Martma, Tõnu, Raidla, Valle, Schloemer, Stefan, Sepp, Holar, Vaikmäe, Rein, Walraevens, Kristine
Format: Article
Language:English
Subjects:
Bacterial sulphate reduction
Isotopic composition of sulphate
Palaeohydrogeology
Redox zonation
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Summary:Ordovician-Cambrian aquifer system (O-Cm) in the northern part of the Baltic Artesian Basin (BAB), Estonia, is part of a unique groundwater reservoir where groundwater originating from glacial meltwater recharge from the Scandinavian Ice Sheet is preserved. The distribution of redox zones in the anoxic O-Cm aquifer system is unusual. Strongly reducing conditions are found near the modern recharge area characterized by low concentrations of sulphate (
ISSN:0009-2541
1872-6836
DOI:10.1016/j.chemgeo.2018.04.027