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Open AccessArticle

Estimates for the Effective Permeability of Intact Granite Obtained from the Eastern and Western Flanks of the Canadian Shield

1
Department of Civil Engineering and Applied Mechanics, McGill University, 817 Sherbrooke Street West, Montréal, QC H3A OC3, Canada
2
Swiss Seismological Service, ETH Zurich, CH-8092 Zurich, Switzerland
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(8), 667; https://doi.org/10.3390/min10080667
Received: 17 June 2020 / Revised: 12 July 2020 / Accepted: 24 July 2020 / Published: 27 July 2020
(This article belongs to the Special Issue The Hydro-Mechanics of Crystalline Rocks)
Granitic rock from the western part of the Canadian Shield is considered as a potential host rock for the siting of a deep geological repository for the storage of heat-emitting high-level nuclear fuel waste. The research program focused on the use of surface permeability measurements conducted at 54 locations on a 300 mm cuboid of granite, obtained from the Lac du Bonnet region in Manitoba, to obtain an estimate for the effective permeability of the cuboid. Companion experiments are conducted on a 280 mm cuboid of granite obtained from Stanstead, Quebec, located in the eastern part of the Canadian Shield. The surface permeabilities for the cuboids of granite are developed from theoretical relationships applicable to experimental situations where steady flow is initiated at a sealed annular surface region with a pressurized central domain. The experimental values for the surface permeability are used with a kriging procedure to estimate the permeability variations within the cuboidal region. The spatial variations of permeability are implemented in computational models of the cuboidal regions to determine the one-dimensional permeabilities in three orthogonal directions. The effective permeability of the granite cuboids is estimated by appeal to the geometric mean. The research provides a non-destructive methodology for estimating the effective permeability of large specimens of rock and the experiments performed give estimates for the effective permeability of the two types of granitic rock obtained from the western and eastern flanks of the Canadian Shield. View Full-Text
Keywords: the Canadian Shield; permeability of granite; innovative experiments; large sample testing; effective permeability; geometric mean the Canadian Shield; permeability of granite; innovative experiments; large sample testing; effective permeability; geometric mean
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MDPI and ACS Style

Selvadurai, A.P.S.; Blain-Coallier, A.; Selvadurai, P.A. Estimates for the Effective Permeability of Intact Granite Obtained from the Eastern and Western Flanks of the Canadian Shield. Minerals 2020, 10, 667. https://doi.org/10.3390/min10080667

AMA Style

Selvadurai APS, Blain-Coallier A, Selvadurai PA. Estimates for the Effective Permeability of Intact Granite Obtained from the Eastern and Western Flanks of the Canadian Shield. Minerals. 2020; 10(8):667. https://doi.org/10.3390/min10080667

Chicago/Turabian Style

Selvadurai, A. P.S.; Blain-Coallier, A.; Selvadurai, P. A. 2020. "Estimates for the Effective Permeability of Intact Granite Obtained from the Eastern and Western Flanks of the Canadian Shield" Minerals 10, no. 8: 667. https://doi.org/10.3390/min10080667

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