Conditions for the formation of the chemical composition of the water of the Firuza MGU carbonated spring (Northern Pamirs)

Abstract

We considered the geological conditions and chemical composition of the water of the Firuza MGU carbonated spring, which was discovered in 2015 in Northern Pamir. This paper reports on the detailed composition of the miсrocomponents of the water as determined by an Inductively Coupled Plasma Mass Spectrometry analysis (ICP-MS). A comparative review of the water composition and content of similar microcomponents in waters of carbonated springs in Kamchatka and the Russian Far East is given. On the basis of the B: Cl and K: Li: Rb: Cs ratios, which are close to the same ratios for chloride sodium hot springs in areas of active volcanism, it is concluded that the water of the spring has a deep origin. The temperature of the formation of water calculated by a Na–K geothermometer method is 147.3°C, suggesting the formation of the spring at a depth of approximately 5 km.