Comment [on “Rates and patterns of groundwater flow in the Cascade Range volcanic arc and the effect on subsurface temperatures” by S. E. Ingebritsen, D. R. Sherrod, and R. H. Mariner]

Blackwell, David; Priest, George R.

doi:10.1029/96jb01507

Cited by 13 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The low Peclet number in the Beaverhill Lake aquifer (Table 3), which is located in this basin, also suggests a system dominated by conduction. In another controversy over the importance of convection (Forster and Smith 1989; Ingebritsen et al 1992; Blackwell and Priest 1996), Ingebritsen et al (1996) made convincing arguments in support of convection in the Cascade Range, Oregon, United States.…”

Section: Basin‐scale Studiesmentioning

confidence: 99%

Heat as a Ground Water Tracer

2005

View full text Add to dashboard Cite

Heat carried by ground water serves as a tracer to identify surface water infiltration, flow through fractures, and flow patterns in ground water basins. Temperature measurements can be analyzed for recharge and discharge rates, the effects of surface warming, interchange with surface water, hydraulic conductivity of streambed sediments, and basin-scale permeability. Temperature data are also used in formal solutions of the inverse problem to estimate ground water flow and hydraulic conductivity. The fundamentals of using heat as a ground water tracer were published in the 1960s, but recent work has significantly expanded the application to a variety of hydrogeological settings. In recent work, temperature is used to delineate flows in the hyporheic zone, estimate submarine ground water discharge and depth to the salt-water interface, and in parameter estimation with coupled ground water and heat-flow models. While short reviews of selected work on heat as a ground water tracer can be found in a number of research papers, there is no critical synthesis of the larger body of work found in the hydrogeological literature. The purpose of this review paper is to fill that void and to show that ground water temperature data and associated analytical tools are currently underused and have not yet realized their full potential.

show abstract

Section: Basin‐scale Studiesmentioning

confidence: 99%

Heat as a Ground Water Tracer

2005

View full text Add to dashboard Cite

show abstract

“…Scatter arises from two main sources: first, local variability associated with hydrothermal and shallow magmatic systems which enhance surface heat flow; second, topographically driven flow at a regional scale which acts to suppress surface heat flow [ Ingebritsen et al , 1989]. In fact, for both reasons it can be difficult to reliably identify temperature gradients that reflect magma and heat delivery from the mantle and mid to lower crust, leading to significant uncertainty even when deep holes are used [ Ingebritsen et al , 1996; Blackwell and Priest , 1996; Manga , 1998]. Instead the boxes we plot in Figure 4b capture the representative ranges for the forearc, arc, and backarc.…”

Section: Comparison With Previous Measurements and Other Arcsmentioning

confidence: 99%

Heat flow in the Lesser Antilles island arc and adjacent back arc Grenada basin

Manga

Hornbach

Friant

et al. 2012

Geochem Geophys Geosyst

View full text Add to dashboard Cite

[1] Using temperature gradients measured in 10 holes at 6 sites, we generate the first high fidelity heat flow measurements from Integrated Ocean Drilling Program drill holes across the northern and central Lesser Antilles arc and back arc Grenada basin. The implied heat flow, after correcting for bathymetry and sedimentation effects, ranges from about 0.1 W/m 2 on the crest of the arc, midway between the volcanic islands of Montserrat and Guadeloupe, to <0.07 W/m 2 at distances >15 km from the crest in the back arc direction. Combined with previous measurements, we find that the magnitude and spatial pattern of heat flow are similar to those at continental arcs. The heat flow in the Grenada basin to the west of the active arc is 0.06 W/m 2 , a factor of 2 lower than that found in the previous and most recent study. There is no thermal evidence for significant shallow fluid advection at any of these sites. Present-day volcanism is confined to the region with the highest heat flow.

show abstract

“…The transition from permeable to impermeable rock is indicated in temperature profiles of deep wells, and is identified by a change from isothermal conditions (where convective movement of heat by groundwater flow dominates) to regions that exhibit a linear temperature increase with depth (where conduction dominates). Blackwell (1992) notes that isothermal sections in deep boreholes extend as deep as 1,600 ft at sites in the High Cascades (the Quaternary part of the volcanic arc), but typically extend to depths of less than 1,300 ft. Blackwell and Priest (1996) suggest that groundwater flow at velocities sufficient to affect heat flow is restricted to local regions, except in the 0-1,600 ft depth range in the high Cascade Range. The volume of water moving through low-permeability strata at depths greater than 1,600 ft in the Cascade Range is sufficiently small to be considered negligible compared to the overall groundwater budget, and these low-permeability strata are considered in this study to be the base of the regional groundwater flow system.…”

Section: Hydrogeology Geologic Framework and Hydrogeologic Unitsmentioning

confidence: 97%