Abstract
In southern British Columbia the terrestrial heat flow is low (44 mW m−2) to the west of the Coast Plutonic Complex (CPC), average in CPC (50–60 mW m−2),and high to the east(80–90 mW m−2). The average heat flow in CPC and the low heat generation (less than 1 μW m−3) indicate that a relatively large amount of heat flows upwards into the crust which is generally quite cool. Until two million years ago the Explorer plate underthrust this part of the American plate, carrying crustal material into the mantle. Melted crustal rocks have produced the inland Pemberton and Garibaldi volcanic belts in the CPC.
Meager Mountain, a volcanic complex in the CPC 150 km north of Vancouver, is a possible geothermal energy resource. It is the product of intermittent activity over a period of 4 My, the most recent eruption being the Bridge River Ash 2440 y B.P. The original explosive eruption produced extensive fracturing in the granitic basement, and a basal explosion breccia from the surface of a cold brittle crust. This breccia may be a geothermal reservoir. Other volcanic complexes in the CPC have a similar potential for geothermal energy.
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References
Anderson, R. G. (1975), The geology of the volcanics in the Meager Creek Map-area, southwestern British Columbia, U. of British Columbia B.Sc. Thesis.
Hammerstrom, L. T. andBrown, T. H. (1977),Geochemistry of thermal waters in the Mt. Meager Hot Springs Area, British Columbia inRept. of Activities, Geol. Surv. Can., Paper 77-1A, 283–285.
Hutchison, W. W. (1970),Metamorphic framework and plutonic styles in the Prince Rupert Region of the central Coast Mountains, British Columbia, Can. J. Earth Sci.7, 376–405.
Hyndman, R. D. (1976),Heat flow measurements in the inlets of southwestern British Columbia, J. Geophys, Res.81, 337–349.
Jessop, A. M.,Geothermal Energy from Sedimentary Basins, Geothermal Series No. 8,Energy, Mines and Resources (Ottawa, 1976).
Jessop, A. M. andJudge, A. S. (1971),Five measurements of heat flow in southern Canada. Can. J. Earth Sci.8, 711–716.
Judge, A. S. (1977),Terrestrial heat flow and the thermal structure of the Eastern Canadian Cordillera (abstr.). 1977 Annual Meetings of G.A.C., M.A.C., S.E.G. and C.G.U., Vancouver, Program with Abstracts, Vol. 2, 28.
Judge, A. S., Lewis, T. J. andJessop, A. M. (in prep.)The heat flow, heat production and geothermal energy potential of southeastern British Columbia.
Lewis, T. J. (1976),Heat generation in the Coast Range Complex and other areas of British Columbia, Can. J. Earth Sci.13, 1634–1642.
Lewis, T. J. (1977),Terrestrial heat flow in the Southern Coast Plutonic Complex (abstr.). 1977 Annual Meetings of G.A.C., M.A.C., S.E.G. and C.G.U., Vancouver, Program with Abstracts, Vol. 2, 32.
Lewis, T. J., Judge, A. S. andJessop, A. M. (in prep.)The geothermal structure of the Coast Plutonic Complex.
Lewis, T. J. andSouther, J. G. (1979),Meager Mountain, B.C. — A possible geothermal energy resource, Geothermal Series No. 9,Energy, Mines and Resources, Ottawa.
Monger, J. W. H., Souther, J. G. andGabrielse, H. (1972),Evolution of the Canadian Cordillera: A plate-tectonic model, Am. J. Sci.272, 577–602.
Nevin Sadlier-Brown Goodbrand Ltd., (1975),Detailed Geothermal Investigation at Meager Creek, Report to B.C. Hydro and Power Authority.
Palmason, G.,On heat flow in Iceland in relation to the mid-Atlantic ridge, inBjornsson,J. (ed.),Iceland and Mid-Ocean Ridge, pp. 111–127, Rept. of Symp. (Geoscience Soc., Reykjavik 1967).
Read, P. B. (1977),Meager Creek volcanic complex, southwestern British Columbia, inReport of Activities Pt. A., Geol. Surv. Can. Paper 77-1A.
Riddihough, R. P. andHyndman, R. D. (1976),Canada's active western margin — the case for subduction, Geoscience Canada3, 269–278.
Roddick, J. A. andHutchison, W. W. (1974),Setting of the Coast Plutonic Complex, British Columbia, Pacific Geology8, 91–108.
Roddick, J. A. andWoodsworth, G. J. (1975),Coast Mountains Project: Pemberton (92 J West Half) Map-area, B.C. Geol. Sury. Can. Paper 75-1, part A, 37–40.
Souther, J. G. (1976),Geothermal Potential of Western Canada, inProc. Second U.N. Symp. on the Development and Use of Geothermal Resources, San Francisco, Vol. 1, pp. 259–267.
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Earth Physics Contribution No. 704.
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Lewis, T.J., Judge, A.S. & Souther, J.G. Possible geothermal resources in the Coast Plutonic Complex of southern British Columbia, Canada. PAGEOPH 117, 172–179 (1978). https://doi.org/10.1007/BF00879744
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DOI: https://doi.org/10.1007/BF00879744