بررسي منشا چشمه آب گرم زيارت گرگان از طريق مطالعات هيدروشيمي و ايزوتوپي

The origin of the thermal water of Ziarat, Gorgan by hydrochemistry and isotopic studies

Nowadays, thermal springs are very important from economic, geology medicine and tourism. Thermal spring of Ziarat is the unique thermal water of Golestan Province, which are undergone chemical and isotopic studies for determination of its properties and origin as well as its potential for other applications. This water springs with annual flow of about 52 lit/sec and means temperature of 30 C has hydrochemistry facies in limit of Na+Cl- and Na+HCO3-. Dominated cation is sodium while dominatedanion is chloride. Hydrochemistry properties and geothermometery of this spring indicate that the feed system and input to reservoir are scatter and dispersive while output system is conduit and under pressure. So that, it is not considered as a hydrothermal spring. The high temperature of this spring is due to thermal gradient. Isotopic studies reveals that the origin of water is not old and traces of new precipitation are very low. The feeding of this spring is from precipitation of highest part of watershed. The flowage occurs at depth and is not related to surrounding springs.