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Geothermal manifestations and structures in Innstidalur and Middalur, SW-Iceland

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dc.contributor Jarðhitaskóli Háskóla Sameinuðu þjóðanna is
dc.contributor.author Ibrahim, Mohamed Omer is
dc.date.accessioned 2014-10-29T18:35:21Z
dc.date.available 2014-10-29T18:35:21Z
dc.date.issued 2004
dc.identifier.issn 1670-7427
dc.identifier.uri http://hdl.handle.net/10802/7925
dc.description Myndefni: kort, línurit, töflur is
dc.description.abstract Geothermal activity is considerable in the Innstidalur and Middalur valleys of the Hengill central volcano. Detailed geological, structural and geothermal mapping was carried out, presented by maps in the scale of 1:15,000. This included mapping of 165 springs, by measuring their temperature, pH and conductivity, and estimating flow rate. A description is given of hydrothermal manifestations in the area. The main geothermal activity on the surface is in the southeast part, in Middalur valley, and in the northwestern part of the area. The geothermal activity relates to a volcanic fissure and faults trending close to NE-SW. By activity, the geothermal manifestations can be divided into three main areas. In the northwestern part, geothermal activity is characterized by boiling water, mud pools and steaming ground, with some sulphur fumaroles, altered grey to brownish rock. In the central part of the field, extinct alteration is evidenced by brownish grey altered hyaloclastites with smectitic clays and calcium carbonates as main alteration minerals. In the third area, in Middalur valley, it is characterized by hot ground, mud pools, steam vents and some travertine deposits. Cold water springs in the area are located at an altitude of 350-500 m a.s.l., above the geothermal alteration zone. In some cases, the cold water has passed through heated or steaming ground and has been heated up. The proposed geothermal model of the area shows the geothermal activity associated with active fissures and faults. is
dc.format.extent 18 s. is
dc.language.iso en
dc.publisher United Nations University is
dc.publisher Orkustofnun is
dc.relation.ispartofseries United Nations University., UNU Geothermal Training Programme, Iceland. Report ; 2004-14
dc.relation.uri http://www.os.is/gogn/unu-gtp-report/UNU-GTP-2004-14.pdf
dc.subject Jarðhiti is
dc.subject Jarðhitarannsóknir is
dc.subject Jarðfræði is
dc.subject Jarðboranir is
dc.subject Jarðhitasvæði is
dc.subject Hengill is
dc.subject Hengilssvæðið is
dc.title Geothermal manifestations and structures in Innstidalur and Middalur, SW-Iceland en
dc.title.alternative Geothermal training in Iceland en
dc.type Bók is
dc.identifier.gegnir 001034557


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