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Physicochemical evolution of the thermal springs over the Siwana Ring Complex, western Rajasthan.

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Title: Physicochemical evolution of the thermal springs over the Siwana Ring Complex, western Rajasthan.
Authors: Singh, Hemant1 hemantkrsingh25@gmail.com, Garg, G.1, Chandrasekharam, D.1, Trupti, G.1, Singh, B.
Source: Journal of the Geological Society of India. Dec2014, Vol. 84 Issue 6, p668-674. 7p.
Subject Terms: *Hot springs, *Ring complexes (Geology), *Surface temperature, *Granite, *Volcanic ash, tuff, etc., *Alkaline earth metals
Geographic Terms: Rajasthan (India)
Abstract: The chemical composition of thermal springs from Siwana Ring Complex (SRC) of Barmer district, Rajasthan, India has been investigated for the first time. These springs are near neutral to mildly alkaline (pH = 6.8 to 7.8) in nature with surface temperatures varying between 31 to 39 °C. Piper diagram suggests that these thermal springs are dominated by Ca-HCO type. Experimental results of water-rock interaction at 100 °C indicate that the thermal springs are circulating through tuff and a sedimentary formation extensively controlled by ring dykes of granites, felsic volcanics and mafic dyke and the fault systems associated with the host rock. Groundwater and thermal springs show similar characteristics. Estimated reservoir temperature suggests that Siwana area geothermal system is a low enthalpy system. Heat flow values of the area range from 83 to 205 mWm, promise a viable potential for Enhanced Geothermal System (EGS). [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
Description
Abstract:The chemical composition of thermal springs from Siwana Ring Complex (SRC) of Barmer district, Rajasthan, India has been investigated for the first time. These springs are near neutral to mildly alkaline (pH = 6.8 to 7.8) in nature with surface temperatures varying between 31 to 39 °C. Piper diagram suggests that these thermal springs are dominated by Ca-HCO type. Experimental results of water-rock interaction at 100 °C indicate that the thermal springs are circulating through tuff and a sedimentary formation extensively controlled by ring dykes of granites, felsic volcanics and mafic dyke and the fault systems associated with the host rock. Groundwater and thermal springs show similar characteristics. Estimated reservoir temperature suggests that Siwana area geothermal system is a low enthalpy system. Heat flow values of the area range from 83 to 205 mWm, promise a viable potential for Enhanced Geothermal System (EGS). [ABSTRACT FROM AUTHOR]
ISSN:00167622
DOI:10.1007/s12594-014-0177-0