Gases of Icelandic hydrothermae |
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| Authors: | S A Arnorsson V I Kononov B G Polak |
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| Institution: | 1. Department of Natural Heat of National Energy Authority, Reykjavik, Iceland
2. Geological Institute of the USSR Academy of Sciences, Moscow
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| Abstract: | The main hydrochemical types of Icelandic hydrothermae are recognized as well as the reguliarities in their distribution. Nitrogenous thermae are spread mainly in the areas of Pre-Quaternary flood-basalts; carbon-dioxide thermae are peculiar of the volcanic zone of Snaefellsnes peninsula, whereas nitrogenous-carbon-dioxide thermae are characteristic of the areas of Pre-Holocene volcanic activity in the Median neovolcanic zone and some adjacent areas. The special hydrochemical feature of the axial parts of Median neovolcanic zone is the presence of high-temperature hydrothermal systems with great amount of H2 in the gas composition. Hydrogenous thermae of Iceland are considered to be a specific genetic type of hydrothermae, being formed in the zones of mid-oceanic ridges. The origin of H2 is discussed. |
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