Balikon lake is a high—altitude and enclosed inland lake. The information and evolution of it is mainty controlled by melting of ice and evaporation of water. Based on oxygen and carbon isotope analysis of ostracoda obtained from samples in the drilling core ZKOOA

which is located at northern Balikun Lake. Total five isotopic stages are divided since the Late Pleistocene. Odd—numbered stages reprsent freshening period

yet are related to damp

cold climate. While even-numbered stages are corre spondence with saline water period as well as with warm

dry climate. Meanwhile

the former deals with high lake level

the later with low lake level.