Salt mine introduction:The salt sedimentary minerals of the salt lake are composed of halite, gypsum, mirabilite, anhydrous mirabilite, epsom salt, white sodium magnesium vitriol and water rock salt. The salt grains are large and pure. It has a mellow taste and is an ideal place to mine edible salt. Because the salt crystals contain minerals, which make the salt crystals appear bluish-black, it is called "green salt".