The origin of Halite with Introduction of Glauberite and Sassolite Minerals in Larestan Salt Domes, (South of Iran)

Salt domes are one of the most notable features on the face of Zagros in the south of Iran. In this study the salt of Dehkoyeh, Paskhand and Karmostaj domes located in Larestan based on salt colors were analyzed. In mineralogical studies for the first time two minerals, Sassolite B(OH)3 and Glauberite Na2Ca(SO4)2 which are of today 's fumaroles indexes in different parts of the world, were identified in Dehkoyeh dome as well as Hormuz salt formation. Generally, compared to other existing elements iron has the greatest impact on the changes of salt color. In salts accompanying sassolite and Glauberite certain minerals with temperature range between 50°C to 60°C were identified. Sea floor fumaroles has probably played important roles in formation of Hormuz salt in infra-Cambrian era. In all probability this fumarole was the main supply of ions needed for salt formation and this fact justifies the emergence of large volumes of Hormuz salt in a relatively short time.