Geothermal fields of Hengill Volcano,Iceland |
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| Authors: | O K Zakharova V V Spichak |
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| Institution: | 1.Center of Geoelectromagnetic Research, Institute of Physics of the Earth,Russian Academy of Sciences,Troitsk, Moscow Oblast,Russia |
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| Abstract: | This paper provides a review of geological, geophysical, and geochemical studies for three geothermal zones of Hengill Volcano,
Iceland: Nesjavellir, Hellisheidi, and Hveragerdi. We discuss the relationships between global tectonics and high-temperature
geothermal systems in Iceland. The bulk of this review is devoted to studies of the physical, geochemical, and mineralogic
parameters for the three areas. A separate discussion concerns surface phenomena, as well as the origin of thermal water.
This review covers studies of the main aquifer complexes: Miocene/Lower Pliocene plateau basalts, Upper Pliocene/Pleistocene
lavas and volcanoclastics involving tillite horizons, an aquifer complex of Holocene lava sheets as thick as 1 km, and an
aquifer complex of Upper Pleistocene/Holocene alluvial eolian deposits and formations of bottom moraines. We consider a conceptual
model of geothermal reservoirs characteristic for the Hengill geothermal fields. |
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