Izvle~ekPojavi naravnih izvirov CO 2 in vode z veliko prostega plina v Sloveniji so poznani predvsem v Slovenskih goricah. S terenskim delom v letih 2014-2015 smo hidrogeološko opisali enajst izvirov vode in/ali plina: Ihovska slatina, Ivanjševska slatina, Lokavska slatina, Polička slatina, Radvenska slatina, mofeta Rihtarovci, Stavešinske Slepice, Stavešinske mofete Strmec, Ujterska slatina, Verjanska slatina in Žekš. Za pet nezajetih izvirov smo ugotovili, da lahko premer presega 4 m, globina dna pa 2 m, čeprav je njihov obseg večinoma skromnejši. Izdelali smo batimetrične 3D modele izvirnega območja ter na tlorisu označili mesta izhajanja plina in ocenili intenzivnost dotoka po subjektivni, vizualni petstopenjski lestvici. Izmerili smo tudi fizikalno-kemijske parametre vode. Opazovane pojave smo razvrstili med mofete in mineralne vode. Dve sta mokri mofeti (Polička slatina in Slepice), tri pa suhe (mofeta Rihtarovci, mofeta Strmec, mofeta pri Lokavski slatini). Iz njih stalno izhaja hladen CO 2 , površinska ali padavinska voda je kisla, v okolici pa je opazno spremenjeno rastje in/ali gola tla. Mineralna voda z nad 1 g/l skupnih raztopljenih snovi izvira v Ihovski, Ivanjševski in Radvenski slatini ter Žekšu in je bogata s prostim CO 2 z intenzivnostjo izhajanja plina 2-4. Verjanska in Ujterska slatina nista niti mofeti niti mineralni vodi. Prva je mogoče, tako kot večina, slatina, z nad 250 mg/l prostega CO 2 (CO 2 ) g . Povezave med globino dna izvira in intenzivnostjo izhajanja plina na vodni površini nismo našli. AbstractNatural CO 2 springs and groundwater rich in free gas in Slovenia occur mainly in the Slovenske gorice hills. Within the frame of fieldwork performed in 2014-2015 we investigated 11 springs: Ihovska slatina, Ivanjševska slatina, Lokavska slatina, Polička slatina, Radvenska slatina, Mofette Rihtarovci, mofettes Stavešinske Slepice, and Strmec, Ujterska slatina, Verjanska slatina and Žekš. The diameter of five uncaptured springs can exceed 4 m, with depression depths of 2 m, but most are smaller. We elaborated bathymetric 3D models of these spring areas, marked degassing locations in a plan view, and evaluated the gas flux according to a subjective, visual five-level scale. We also measured physicochemical parameters of the water. The observed phenomena were classified among mofettes and mineral waters. Two are wet mofettes (Polička slatina and Slepice) and three dry mofettes (Rihtarovci, Strmec, mofette at Lokavska slatina). These constantly emit cold CO 2 , hold acid surface or meteoric water, and bare soil or changed vegetation may also be present. Mineral water consisting of more than 1 g/l of total dissolved solids surfaces at Ihovska, Ivanjševska and Radvenska slatina, and Žekš. It is rich in free CO 2 , having a flux intensity of 2-4. Verjanska slatina and Ujterska slatina are neither mofettes nor mineral waters. The first, like most others, may be a slatina, having more than 250 mg/l of free CO 2 (CO 2 ) g . We found no connection between the depth of the springs and the intensity of...
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