**8. References**


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**7. Acknowledgment** 

discussions.

**8. References** 


**16** 

Tianlong Deng

*TEDA, Tianjin,* 

*Xining, Qinghai,* 

*Institute of Salt Lakes* 

*Chinese Academy of Sciences* 

*People Republic of China* 

**Stable and Metastable Phase Equilibria** 

**1. Introduction** 

**1.1 Salt lakes and the classification of hydrochemistry** 

lake resources in the world (Gao et al., 2007).

bischofite (MgCl2•6H2O).

Salt lakes are widely distributed in the world, and some famous salt lake resources are shown in Tables 1 and 2. In China, salt lakes are mainly located in the area of the Qinghai-Xizang (Tibet) Plateau, and the Autonomous Regions of Xinjiang and Inner Mongolia (M.P. Zheng et al., 1989). The composition of salt lake brines can be summarized to the complex salt-water multicomponent system (Li - Na – K – Ca - Mg - H - Cl – SO4 – B4O7 – OH- HCO3 – CO3 - H2O).

According to the chemical type of salt lake brines, it can be divided into five types, i.e. chloride type, sulphate type, carbonate type, nitrite type, and borate type among those salt

Chloride type: the component of brines in Death Sea, Mideast and Caerhan Salt Lake in China belongs to the system of chloride type (Na – K – Mg - Cl - H2O), and the main precipitation of salts are halite (NaCl), sylvite (KCl), carnallite (KCl•MgCl2•7H2O), and

Sulphate type: this kind of salt lake resources is similar with the sea water system (Na – K – Mg – Cl – SO4 – H2O), and it can be divided into two kinds of hypotypes i.e. sodium sulphate and magnesium sulphate. As to sodium sulphate hypotype, the Great Salt Lake in America, the gulf of Kara-Bogaz-Golin Urkmenistan, and Da-Xiao Qaidan in China belong to this hypotype with the main deposit of glauberite (Na2SO4•CaSO4), glauber salt (Na2SO4·10H2O), halite, galserite (Na2SO4•3K2SO4), schonenite (K2SO4•MgSO4•6H2O), and so on. As to magnesium sulphate hypotype, there are Yunchen Salt Lake in Shanxi Provine and Chaka Salt Lakes in Qinghai Province, China, especially Salt Lakes of the Qaidam Basin in Qinghai Province are a sub-type of magnesium sulphate brines famous for their

**in the Salt-Water Systems** 

*College of Marine Science and Engineering Tianjin University of Science and Technology* 

*Tianjin Key Laboratory of Marine Resources and Chemistry* 

*CAS Key Laboratory of Salt Lake Resources and Chemistry* 

*Proceedings of International Conference on Advances for Future Nuclear Fuel Cycles (ATALANTE 2004)*, pp. 1-4, P1-66, Nîmes, France, June 21-25, 2004

