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Geothermal resources in the border regions of Croatia and Slovenia : state of the art (CROSBI ID 519541)

Prilog sa skupa u časopisu | sažetak izlaganja sa skupa | međunarodna recenzija

Kovačić, Miron ; Rajver, Dušan Geothermal resources in the border regions of Croatia and Slovenia : state of the art // Geologija / Režun, Bojan ; Eržen, Uroš ; Petrič, Metka et al. (ur.). 2006. str. 110-111

Podaci o odgovornosti

Kovačić, Miron ; Rajver, Dušan

engleski

Geothermal resources in the border regions of Croatia and Slovenia : state of the art

Geothermal waters belong to the natural resources of Croatia and Slovenia. As all other natural resources these are also limited in quality, while their hydrogeothermal systems are sensitive to exploitation and activities that exert influence on environment. Considering that geothermal waters are optimally exploited, preserved and protected in the sense of sustainable development strategy it is necessary to know them well and to exploit them in a supervising manner. Hydrogeothermal systems in the border zone of Croatia and Slovenia are very probably connected in the underground. For this reason the harmful activity on the geothermal aquifers on the one side of the border can have negative effects on exploitation and protection of these waters on the other side. As regards their protection it is necessary to act in a coordinative way in both countries as to avoid detrimental unwanted consequences for geothermal waters in the neighbor country. Considering this it is foreseen in the European Directives that the border countries conduct a mutual care on water protection (incl. geothermal). Unfortunately, Croatia and Slovenia had no common projects and activities so far in this sense. The project “ Geothermal map of Republic of Croatia” is in the preliminary stage in Croatia. Within this project it is planned to investigate the bordering area to Slovenia in the following years, which is why the cooperation between Croatian and Slovenian geological surveys is reestablished. Within the sphere of this cooperation basic data on thermal water localities in the border area of both states are collected which is a good start of mutual care for the protection of these waters there. There are 16 known localities with thermal water on Croatian side. Natural springs of geothermal water from the NE to SW are: Harina Zlaka, Tuhelj Spa, Krapina Spa, St. Helena (at Samobor), Spa at St. Jana, Lešće Spa and Istrian Spa. Water temperatures on these localities are between 25 and 40.2 °C, and the aquifers are mostly in Triassic dolomites. Boreholes that have discovered thermal water, and are deeper than 500 m, are: Vučkovec-2, Mursko Središće-2, Međimurje-1, Kumrovec-1, Tuhelj Spa, Krapina Spa, Samobor-2, Nedjelja-1, PDT-1 and 2, Lučanka-1, Mladost – 1, 2 and 3, KBNZ-1, 2, and 3, St. Jana– 1 and Leščanka-1. The pertinent aquifers are predominantly Triassic dolomites, while the water temperature is between 25 and 82 °C. On the Slovenian side there are 13 known thermal water localities. Natural springs are: Bušeča vas, Topličnik at Kostanjevica, Klevevž and in former times also Dolenjske Spa (boreholes today). Water temperature on these localities ranges from 23 to 34 °C, the aquifers are Mesozoic carbonate rocks. Boreholes with depth of at least 500 m that have discovered thermal water are: Lendava (Pt-20, -74, Le-1g, -2g), Veržej-1, -2, -3, Rogaška Slatina RT-1, Terme Olimia V-4, Čatež V-10, L-1, Dobova AFP-1, Šmarjeta Spa V-11 (227 m depth), Metlika-1 and Portorož HV-1, LU-1. The aquifers found by these boreholes are Tertiary sandstones (Lendava, Veržej), tuffs with sandstone (RT-1), but mostly Triassic dolomites, Jurassic limestones in Metlika, and Cretaceous limestones in Portorož. Temperatures range from 22.5 to 68.4 °C. Based on the collected data on geothermal waters in the border region so far one can infer that there is not enough data to confirm or to reject a link-up and unity of geothermal aquifers on both border sides. Theoretically the possibility of such link-up is very great, therefore, it is necessary to continue to collect the data, and if there is a need, to perform new investigations to confirm or to reject such link-up.

geothermal resources; geothermal waters; Croatia; Slovenia

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Podaci o prilogu

110-111.

2006.

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objavljeno

Podaci o matičnoj publikaciji

Geologija

Režun, Bojan ; Eržen, Uroš ; Petrič, Metka ; Gantar, Ivan

Ljubljana: Geološki zavod Slovenije

0016-7789

Podaci o skupu

Slovenski Geološki Kongres (2 ; 2006)

poster

26.09.2006-28.09.2006

Idrija, Slovenija

Povezanost rada

Geologija, Rudarstvo, nafta i geološko inženjerstvo