青海可可西里地区勒斜武担湖水化学特征研究

Hydrochemical Characteristics of Lexiewudan Lake in Hoh Xil,Qinghai

中文关键词:  勒斜武担湖  水化学  锂  硼  钾

英文关键词:Lexiewudan lake  Water chemistry  Lithium  Boron  Potassium

中文摘要:

      2010年4月对可可西里地区勒斜武担湖进行了考察、采样和分析。研究发现,勒斜武担湖是迄今发现的第一个氯化物型盐湖锂矿床,除CO2-₃外盐湖卤水离子的测定值均比1990年测定值小,这与两次采样的时间、地点不同及湖水变化有关。主要离子含量顺序为Cl->Na⁺>Ca²⁺>K⁺>SO2-₄>Mg²⁺,次要离子为HCO-₃>CO2-₃。湖水中的离子具有水平和垂直分异现象,元素含量从岸边向湖心方向递减(CO2-₃、HCO-₃除外),从湖面向湖底随着深度的增加元素含量先增大而后趋于稳定,前者与湖北岸边高矿化度的泉水补给岸边水体有关,后者与湖泊表面覆盖的冰层稀释表层水体有关。勒斜武担湖Li⁺、B³⁺、K⁺含量均较高,具有较好的资源开采利用价值。

英文摘要:

      :Field investigation,sample collection and analysis have been accomplished by our research team in Lexiewudan Lake at Hoh Xil district in April 2010.Our research shows that the lake is the first chloride-type lithium deposit of salt lake in nature.The content of the brine ions except CO2-₃ in 2010 were smaller than in 1990,this may be related to lake water variation,the different sampling time and locations.The major ion content was in the order of Cl->Na⁺>Ca²⁺>K⁺>SO2-₄>Mg²⁺,the secondary ions is:HCO-₃>CO2-₃.In addition to CO2-₃ and HCO-₃,the ions in the lake water have horizontal and vertical differentiation phenomena of,the ion content decrease from the shore to the lake centre ,increases from surface to 3 m depth,then keeps steady as the water goes deeper.The former phenomenon is related and to the supply from spring with high salinity,and the later phenomenon is caused by the dilution effect of the lake ice.The lake has better resource exploitation value with high Li⁺,K⁺ and B³⁺.