Variability in Timing and Transport of Pleistocene Meltwater Recharge to Regional Aquifers

Aidan C. Mowat, Daniel J. Francis, Jennifer C. McIntosh, Matthew B.J. Lindsay, Grant A.G. Ferguson

Research output: Contribution to journalArticlepeer-review

Abstract

The impacts of Pleistocene glaciation on groundwater flow systems in sedimentary basins are widely recognized, but the timing and distribution of subglacial recharge events remain poorly constrained. We investigate the spatial and temporal variability of recharge events from glaciations over the last 2 million years in the Williston Basin, Canada. Integration of fluid chemistry, stable isotope data, and transport modeling indicate that meltwater arrived at depths of ∼600–1000 m in the northcentral region of the Williston Basin at two separate time periods, 75–150 and 300 ka, which we attribute to permeability differences between stacked aquifer systems. Our findings indicate that meltwater recharge extended along the northern margin of the Williston Basin as well as previously identified recharge areas to the east. Given the distance of measurements from recharge areas, evidence of recharge from the early to mid-Pleistocene appears to be preserved in the Williston Basin.

Original languageEnglish (US)
Article numbere2021GL094285
JournalGeophysical Research Letters
Volume48
Issue number20
DOIs
StatePublished - Oct 28 2021

Keywords

  • Pleistocene
  • groundwater
  • hydrogeology
  • sedimentary basin

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Fingerprint

Dive into the research topics of 'Variability in Timing and Transport of Pleistocene Meltwater Recharge to Regional Aquifers'. Together they form a unique fingerprint.

Cite this