The Ice Keetey cave is the largest underground ice storage in Transbaykal. Data on rocks and ice chemical composition and cryogenic minerals are presented in the paper. The ice mineralization is from 29 to 160 mg/1. The ice of the Big hall perennial icing is weak-alkaline fresh hydrocarbonate-calcic. Ice samples trace element analysis showed that beryllium and thallium concentration exceeds MAC. Other elements (lithium, manganese, cobalt, nickel, copper, zink, gallium, germanium, rubidium, strontium, zirconium, molybdenum, bismuth, cadmium, indium, tin, antimony, cesium, barium, tungsten, lead and hafnium) concentration is normal. Cryogenic minerals are represented with calcite, ikaite, gypsum and barite. Quartz, albite and muscovite are found among xenogenic minerals. Isotopic composition of О and С in cryogenic powder (which mainly consists of calcite and ikaite) is presented in the paper. The received data was compared with the speleotheme calcite (stalagmite) and enclosing rocks isotopic composition.
