Variability in Timing and Transport of Pleistocene Meltwater Recharge to Regional Aquifers
AffiliationUniversity of Arizona
Department of Hydrology and Atmospheric Sciences, University of Arizona
MetadataShow full item record
PublisherJohn Wiley and Sons Inc
CitationMowat, A. C., Francis, D. J., McIntosh, J. C., Lindsay, M. B. J., & Ferguson, G. A. G. (2021). Variability in Timing and Transport of Pleistocene Meltwater Recharge to Regional Aquifers. Geophysical Research Letters.
JournalGeophysical Research Letters
RightsCopyright © 2021 American Geophysical Union. All Rights Reserved.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractThe 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. © 2021. American Geophysical Union. All Rights Reserved.
Note6 month embargo; first published: 07 October 2021
VersionFinal published version