The 'age' of very old groundwater: Insights from reactive transport models

C. M. Bethke, T. Torgersen, J. Park

Research output: Contribution to journalConference articlepeer-review

Abstract

The distribution of radioactive and radiogenic isotopes such as 36Cl and 4He provides important information about the residence time (or 'age') and flow velocity of groundwater in sedimentary basins, but the relationship between the distribution of an isotope and the basin hydrology is not always clear. We use reactive transport modeling to investigate the controls on isotope distribution and groundwater residence time in hypothetical and real flow regimes. Our results show that by moving beyond the simple 'piston flow' concept, we can use isotope distributions to constrain internally consistent descriptions of deep groundwater flow regimes within sedimentary basins. (C) 2000 Elsevier Science B.V. All rights reserved.

Original languageEnglish (US)
Pages (from-to)1-4
Number of pages4
JournalJournal of Geochemical Exploration
Volume69-70
DOIs
StatePublished - Jun 2000
EventGeofluids III - 3rd International Conference on Fluid Evolution, Migration and Interaction in Sedimentary Basins and Orogenic Belts - Barcelona, Spain
Duration: Jul 12 2000Jul 14 2000

Keywords

  • Basin hydrology
  • Groundwater age
  • Radioisotopes
  • Reactive transport

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Economic Geology

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