Journal article

Controls on chemistry during fracture-hosted flow of cold CO2-bearing mineral waters, Daylesford, Victoria, Australia: Implications for resource protection

TR Weaver, I Cartwright, SO Tweed, D Ahearne, M Cooper, K Czapnik, J Tranter

APPLIED GEOCHEMISTRY | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2006

Abstract

Mineral springs from Daylesford, Australia discharge at ambient temperatures, have high CO2 contents, and effervesce naturally. Mineral waters have high HCO3 and Na concentrations (up to 4110 and 750 mg/L, respectively) and CO2 concentrations of 620-2520 mg/L. Calcium and Mg concentrations are 61-250 and 44-215 mg/L, respectively, and Si, Sr, Ba, and Li are the most abundant minor and trace elements. The high P CO2 of these waters promotes mineral dissolution, while maintaining low pH values, and geochemical modelling indicates that the CO2-rich mineral water must have interacted with both sediments and basalts. Amorphous silica concentrations and silica geothermometry indicate that these wa..

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