Abstract
Located on the north-western border of the Inle lake basin, the Khaung Daing hot spring outflows at ca. 70°C. Temperature at depth, calculated with chemical geothermometers is probably less than 150°C, therefore classifying it as a medium-low enthalpy geothermal resource. Geochemical and isotopic results also demonstrate that the hot spring is fed by local groundwater, equilibrated with the carbonate rocks but without isotopic exchange with the matrix. Trace elements, particularly As (119 µg/L), display high concentrations, raising some concern about potential environmental and health effects.
Highlights
Introduction and study areaThe Inle Lake basin (Southern Shan State, Myanmar) is located in the Shan Plateau, belonging to the Sibumasu block [1], and mainly made of Permo-Triassic carbonates
Stable isotopes of the water molecule were determined by WavelengthScanned Cavity Ring-Down Spectroscopy (WS-CRDS) at ISO4 in Italy
Results suggest that the spring is fed by groundwater circulating in the watershed, equilibrated with the carbonate rocks but with no isotopic exchange with the matrix
Summary
Introduction and study areaThe Inle Lake basin (Southern Shan State, Myanmar) is located in the Shan Plateau, belonging to the Sibumasu block [1], and mainly made of Permo-Triassic carbonates. The water stable isotope composition ( D and 18O), close to the Yangon Meteoric Water Line, agrees with the mean composition of the lake water during the rainy season, suggesting that the hydrothermal circuit could be recharged by local precipitation [6]. These preliminary results indicated that this hydrothermal water is likely related to deep meteoric and ground water circulation within a fault zone, in a region characterized by an elevated geothermal gradient. The aim of this contribution is to provide this information to support a sustainable development of this resource
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