Age and recharge area of thermal waters in La̧dek Spa (Sudeten, Poland) deduced from environmental isotope and noble gas data

The object of our investigation was to study a mechanism of water formation in the Surdulica geothermal system (recharge area, age and homogeneity of the waters). We collected 56 samples to determine the chemical, stable isotope, 14C and tritium content of the waters. We found large stable isotope variations in precipitation collected at different altitudes, whereas the geothermal waters are largely homogeneous and seasonally independent. Data on springs and rivers, the local meteoric water line and recharge area were obtained. Three groups of groundwater were identified by age – modern from natural springs, old from mines and very old from the Vranjska Banja. Because the initial 14C activity of infiltrated waters from the recharge area is unknown, the age of thermal waters can only be inferred, from HCO3 −, 14C and 3H content, to be 10,000 to 28,000 years old.

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Noble gas, CFC and other geochemical evidence for the age and origin of the Bath thermal waters, UK

Applied Geochemistry ◽

10.1016/j.apgeochem.2013.10.007 ◽

2014 ◽

Vol 40 ◽

pp. 155-163 ◽

Cited By ~ 8

Author(s):

W. Mike Edmunds ◽

W. George Darling ◽

Roland Purtschert ◽

José A. Corcho Alvarado

Keyword(s):

Noble Gas ◽

Thermal Waters ◽

Geochemical Evidence

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Radiocarbon Concentration and Origin of Thermal Karst Waters in the Region of the Bükk Mountains, Northeastern Hungary

Radiocarbon ◽

10.1017/s0033822200031039 ◽

1995 ◽

Vol 37 (2) ◽

pp. 543-550 ◽

Cited By ~ 1

Author(s):

Ede Hertelendi ◽

Mihály Veres ◽

István Futó ◽

Éva Svingor ◽

Lajos Mikó ◽

...

Keyword(s):

Thermal Water ◽

Inorganic Carbon ◽

Dissolved Inorganic Carbon ◽

Karst Aquifer ◽

Thermal Waters ◽

Karst Water ◽

Recharge Area ◽

Karst Springs ◽

Karst Waters ◽

Karst Systems

Karst springs are abundant in Hungary, and many are thermal (temperatures >30°). As thermal springs are a significant part of Hungary's water resources, it is important to quantify their travel times in the karst systems. Thus, we chose to measure T and δ18O in the water and δ13C and 14C in dissolved inorganic carbon (DIC) in water from 50 thermal and nonthermal springs and wells in the Bükk Mountains, northeastern Hungary. Environmental isotope data confirm the karst water-flow pattern implied by earlier studies. We found the water in warm springs and boreholes to be mixtures of cold young and old thermal water. We also determined short mean-residence times for some large cold springs. The 14C activities measured in these springs indicate that the recharge area of the karst aquifer is open to the atmosphere, and atmospheric CO2 contributes to the 14C activity of these groundwaters. We observed good correlation between 14C and 3H activities and we determined negative correlations between 14C concentration and δ13C values and temperature. From the δ18O values of the oldest thermal waters, we attribute their origin to precipitation during colder temperatures than at present.

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