At present,there are two types of understanding about the formation of natural hydromagnesite: evaporative deposition and biogenic.Previously,the hydromagnesite was successfully prepared in the laboratory,which confirmed the theory of inorganic genesis of hydromagnesite.However,the experimental crystallization conditions of hydromagnesite are significantly higher than the cold climate and hydrochemical conditions in Bangor Lake (Bangor Co),Xizang(Tibet).In addition,it is difficult for the brine in Bangor salt lake to form hydromagnesite minerals through natural evaporation and crystallization.This understanding is in contradiction with the phenomenon of hydromagnesite forming on the surrounding terraces in Bangor salt lake.Therefore,natural evaporation deposition may not be the main formation process of hydromagnesite in Bangor salt lake at this stage,there are studies have shown that algae have the ability to induce the formation of carbonate minerals.In this paper,the genesis of hydromagnesite in Bangor Lake is discussed from the perspective of algae biogenesis.Methods: In this paper,a laboratory simulation experiment was carried out by using high concentration brine and its algae of III lake in Bangor salt lake,and compared with the natural crystallization results of the lake water without algae in Bangor salt lake,to discuss the genetic relationship between the life activities of algae and the hydromagnesite in Bangor salt lake, Xizang(Tibet).Results: The algae can not only adapt to high salinity environment (117.3 g/L),but also significantly improve the pH value of the surrounding water body (up to 10.564) in the process of photosynthesis,inducing and facilitating the crystallisation and precipitation of dypingite at the algae reticulation nodes, which can be further dehydrated to form hydromagnesite mineral.In addition,when the concentration of Mg2+in Bangor salt lake was increased artificially,only the nesquehonite minerals could be crystallized,and the dypingite or hydromagnesite minerals can not be crystallized.Conclusions: In this study,it was found that the biological mineralization dominated by algae was closely related to the crystallization and precipitation process of hydromagnesite in Bangor salt lake, Xizang(Tibet).However,the specific conditions concerning the transformation of dypingite to hydromagnesite and the specific molecular mechanism of algae mineralization are still unclear and need to be further investigated.