Paper Title
Chloride and Bromide in Waters from Caldas Novas Hydrothermal Complex, Goiás State, Brazil

Abstract
Chlorine and bromine are halogen elements belonging to Group 17 of the Periodic Table, consisting on the source of the ions chloride (Cl-) and bromide (Br-) that are very conservative when released into natural waters during water/rock-soil interactions, thus, becoming useful tracers of processes taking place in surface drainage and groundwater systems. Bromide data in hydrological resources are generally scarce in the literature, mainly in South America, due to analytical constraints for measurements specially in more dilute waters. This study reports a hydrogeochemical survey involving the presence of both Cl- and Br- in the Caldas Novas Hydrothermal Complex, Goiás State, Brazil, which is the world's greatest geothermal water system unrelated to magmatism.The dataset consisted of 26 samples of rainwater, surface waters and groundwaters providing from Caldas Novas and Rio Quente cities, yielding relevant information for further studies in that important hydrological resource extensively used for touristic purposes. Keywords - Chloride, Bromide, Caldas Novas Hydrothermal Complex, Goiás State, Brazil.