Abstract
Depth profiles of solute chemistry and sulfate isotopic compositions are presented for groundwater and pore water in a sequence of Quaternary glacial outwash sediments. Sand units show evidence for hydraulic connection to the surface and thus modern sources of solutes. Finer-grained sediments show a general pattern of increasing solute concentrations with depth, with sulfate derived from ancient rainwater and pyrite oxidation in the soil/drift. In these sediments sulfate has undergone bacterial sulfate reduction (BSR) to produce biogenic sulfide. In clay sediments, with d(10)
Original language | English |
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Pages (from-to) | 726-735 |
Number of pages | 10 |
Journal | Hydrological Processes |
Volume | 24 |
DOIs | |
Publication status | Published - 1 Jan 2010 |