High temperature alteration minerals and thermal brines,Reykjanes, Iceland |
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| Authors: | Jens Tómasson Hrefna Kristmannsdóttir |
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| Affiliation: | (1) Dept. of Natural Heat, National Energy Authority, Laugavegur 116, Reykjavík, Iceland |
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| Abstract: | The geothermal area on Reykjanes, Iceland has been investigated mineralogically. The temperature within the studied area is very variable from 30–300° C. Mineral zones corresponding to the temperature conditions in the area are found. Accidental changes in the geothermal system are also reflected in the mineralogy by formation of anhydrite. Changes in temperature conditions in the field are indicated by epidote occurrence at 40° C and retrograd formation of montmorillonite. |
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