Geochemical Characteristics And Ore-Forming Mechanism Of Ayacuo Brine Deposit Saline In Tibet

Qinghai-Tibet Plateau Salt Lake area is one of the four modern salt lake area,salt lake mineral resources are very rich.Eya Lake is located in the northwest of the plateau of northern Tibet(Qiangtang).It is a newly discovered salt lake with potential for finding rich potassium,lithium and boron brine.Due to the factors such as the natural environment,the research degree isinsufficient,especially for the combination of the brine composition of Eyacuo Lake,as well as the useful and harmful elements content and distribution of the lack of research,to a certain extent,restricted the salt lake Evaluation and Exploitation of Prospecting Potential.This article analyzes the mechanism of the salt lake brine by the hydrogeochemical method of Eyacuo Salt Lake in terms of the frontier research field and the national strategic demand in the aspect of salt lake,the research results provide a theoretical basis for the prospecting,development and utilization of potassium,lithium and boron brine in Eyacuo Lake area,and have important reference value.Based on the geological characteristics and metallogenic mechanism of the Salt Lake brine mining area,the metallogenic background and its hydrogeological characteristics of the Eyacuo salt lake area are mastered.By analyzing the chemical composition of the brine,the variation law of the horizontal and vertical components.Through the experimental analysis of brine isothermal evaporation,we can understand the crystallization route and the salt distribution rule of the brine in the lake.It is concluded that the Eyacuo salt lake brine is mainly composed of lake brine,and its salt lake mineralization is strictly controlled by terrain,topography,hydrological climate and paleogeographic environment.According to the classification of salt lake brine,Eyacuo salt lake belongs to the sulfate type sodium sulfate(magnesium)sub-type salt lake,Its formation requires three conditions:closed flow or half closed flow into salt basins;various chemical element,particularly the salifying element flowing supplies and enrichment;long-term continuous wet,drought alternate paleoclimate and drought modern climate environment.