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- W2185977168 abstract "The active volcanic zones in Iceland are characterized by high heat flow and extensive geothermal activity. Iceland is unique in its location astride the diverging Mid-Atlantic Ridge and, furthermore, on top of a mantle plume. These two dynamic systems combine fundamental factors that promote magmatism, tectonics and geothermal activity. The high-temperature geothermal areas are mainly confined to volcanic systems, in particular central volcanoes, and are subject to strong tectonic control. The Hengill central volcano hosts one of the most powerful geothermal fields in Iceland, dominated by NE-SW striking faults. It is located at the western flank of the West Iceland Volcanic Zone (WVZ), which represents the Mid-Atlantic Ridge on land forming a graben-like structure approximately 10-15 km wide and 100 km long. The Hengill low resistivity structure covers about 112 km 2 and presently Reykjavik Energy operates two power plants in the area with installed capacity of about 420 MWe and 430 MWt. The main geological features include a fissure zone and a graben into which most of the volcanic products (lavas and hyaloclastites) accumulate forming highlands in its central part. Three basaltic fissure eruptions of 9, 5 and 2 thousand years before present are found within the fissure swarm. Reykjavik Energy has explored and exploited the huge geothermal resource developed in this volcanic system, first in Nesjavellir in the northern sector and then Hellisheidi in the south. Extensive geophysical surveys including resistivity (TEM) and MT have been executed to delineate the geothermal anomaly. A total of about 90 deep exploration, production and re-injection wells have been drilled into the geothermal resources at Hengill, and a few exploration wells have also been drilled in the Bitra and Hverahlid fields to the east and south of Hengill central volcano respectively. Temperatures within the Hengill geothermal resource varies from about 200°C to about 320°C." @default.
- W2185977168 created "2016-06-24" @default.
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- W2185977168 date "2014-01-01" @default.
- W2185977168 modified "2023-09-23" @default.
- W2185977168 title "GEOTHERMAL EXPLORATION OF THE HENGILL HIGH-TEMPERATURE FIELD" @default.
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