Abstract
In an active spreading area like Iceland, where the regional geothermal gradient is in the range 50–150°C/km, it is normally not a problem to find high enough temperature with deep drilling, but the difficulties arise with finding permeable layers at depth within the strata. Various volcanological methods can be applied in the search for aquifers and geothermal reservoir rocks. The flow pattern (as deduced from deuterium studies) indicates that the thermal water flows preferentially along high porosity stratiform horizons and dyke swarms from the recharge areas in the highlands to the hot spring areas in the lowlands. The primary porosity of the volcanic strata is dependent on the chemical composition and the mode of eruption of the volcanic units. Both the reservoir rocks and the flow channels forming the geothermal plumbing system are thought to vary from the Tertiary to the Quaternary provinces due to environmental conditions at the eruptive sites.
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References
Árnason, B. (1976),Groundwater systems in Iceland traced by deuterium, Societas Scientarium Islandica42, 236 pp.
Arnórsson, S., Björnsson, A., Gíslason, G. andGudmundsson, G.,Systematic exploration of the Krísuvík high-temperature area, Reykjanes Peninsula, Iceland, inSecond UN Geothermal Symposium Proceedings (Lawrence Berkeley Laboratory, Univ. of California, 1975), pp. 853–864.
Bödvarsson, G. (1961),Physical characteristics of natural heat resources in Iceland, UN Conference on New Sources of Energy, Rome, Proceedings, Geothermal Energy2, 82.
Carmichael, I. S. E. (1964),The petrology of Thingmuli, a tertiary volcano in eastern Iceland, Jour. Petrology5, 435–460.
Einarsson, T. (1942),Über das Wesen der heissen Quellen Islands, Societas Scientarium Islandica26, 91 pp.
Fridleifsson, I. B.,Lithology and structure of geothermal reservoir rocks in Iceland, inSecond UN Geothermal Symposium Proceedings (Lawrence Berkeley Laboratory, Univ. of California, 1975), pp. 371–376.
Fridleifsson, I. B. (1977),Distribution of large basaltic instrusions in the Icelandic crust and the nature of the layer 2-layer 3 boundary, Geol. Soc. Am. Bull.88, 1689–1693.
Fridleifsson, I. B., Furnes, H., Atkins, F. B., Saemundsson, K., andGrönvold, K. (in preparation),Subglacial volcanics, Part I. On the control of magma chemistry on pillow dimensions.
Jónsson, J.,Map of the Distribution of Hot Spring in Iceland (National Energy Authority, Reykjavík, 1967).
Moore, J. G. (1965),Petrology of deep-sea basalt near Hawaii, Am. Jour. Sci.263, 40–53.
Pálmason, G. (1973),Kinematics and heat flow in a volcanic rift zone, with application to Iceland, Geophys. J. Roy. Astron. Soc.33, 451–481.
Pálmason, G. andSaemundsson, K. (1974),Iceland in relation to the Mid Atlantic Ridge, Ann. Rev. Earth Plan. Sci.2, 25–50.
Pálmason, G., Ragnars, K. andZoega, J. Geothermal energy developments in Iceland 1970–1974, inSecond UN Geothermal Symposium Proceedings (Lawrence Berkeley Laboratory, Univ. of California, 1975), 213–217.
Saemundsson, K.,Geological map of Iceland (National Energy Authority, Reykjavík, 1973).
Saemundsson, K. (1974),Evolution of the axial rifting zone in northern Iceland and the Tjörnes fracture zone, Geol. Soc. Am. Bull.85, 495–504.
Stefánsson, V. andArnórsson, S.,A comparative study of hot-water chemistry and bedrock resistivity in the southern lowlands of Iceland, inSecond UN Geothermal Symposium Proceedings (Lawrence Berkeley Laboratory, Univ. of California, 1975), pp. 1207–1216.
Tómasson, J., Fridleifsson, I. B. andStefánsson, V.,A hydrological model for the flow of thermal water in southwestern Iceland with special reference to the Reykir and Reykjavík thermal areas, inSecond UN Geothermal Symposium Proceedings (Lawrence Berkeley Laboratory, Univ. of California, 1975), pp. 643–648.
Thorsteinsson, T.,Redevelopment of the Reykir hydrothermal system in southwestern Iceland, inSecond UN Geothermal Symposium Proceedings (Lawrence Berkeley Laboratory, Univ. of California, 1975), pp. 2173–2180.
Walker, G. P. L. (1963),The Breiddalur central volcano, eastern Iceland, Quart. J. Geol. Soc. Lond.119, 29–63.
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Fridleifsson, I.B. Applied volcanology in geothermal exploration in Iceland. PAGEOPH 117, 242–252 (1978). https://doi.org/10.1007/BF00879750
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DOI: https://doi.org/10.1007/BF00879750