Deep circulation of groundwater in overpressured subglacial aquifers and its geological consequences
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Cited by (83)
Physical characteristics of hydrofracture systems and their fills in glacial sediments
2024, Sedimentary GeologyDeep groundwater circulation in a syncline in Rucheng County, China
2022, Journal of HydrologyCitation Excerpt :A deep groundwater circulation can occur at local scales in headwater drainages less than 9.0 km2 (Frisbee et al., 2017). High rates of meltwater discharge into overpressured subglacial aquifers could produce deep groundwater circulation controlled by the continental-scale form of the ice sheet surface rather than the small-scale topographic basins (Boulton et al., 1993). In addition to geologic and geographic factors, deep groundwater circulation is generally related to geothermal systems.
Modelling permafrost thickness in Great Britain over glacial cycles
2019, Science of the Total EnvironmentCitation Excerpt :If perennially frozen ground underlies the glacial forefield, glacially recharged groundwater is forced under the permafrost (Person et al., 2012b). Groundwater then discharges either near the ice sheet margin by hydrofracturing the sediments (Boulton et al., 1993), into taliks under surface water bodies (Scheidegger and Bense, 2014) or at the sea (Boulton et al., 1993). These zones might be of special importance for a GDF safety assessment.
Glaciohydrogeology
2018, Past Glacial Environments: Second EditionClastic injection dynamics during ice front oscillations: A case example from Sólheimajökull (Iceland)
2015, Sedimentary GeologyCitation Excerpt :2) In submarginal environments, the decrease of ice overburden pressure (i.e., ice thickness decrease) tends to promote the formation of sills because the propagation of hydrofractures is mainly controlled by bedding anisotropy (Kumpalainen, 1994; Phillips et al., 2013). ( 3) In proglacial marginal settings, the absence of ice overburden pressure promotes the upwards release of overpressurized meltwater and thus the formation of per ascensum dykes (Boulton et al., 1993; Boulton and Caban, 1995). In this study, we described at macroscopic and microscopic scales a clastic injection network located in the forefield of Sólheimajökull (South Iceland).