摘要
青藏高原是我国富 L i盐湖的主要分布区域 ,这些富 L i盐湖主要分布在柴达木盆地中部和西藏的中、西部地区。北部柴达木盆地盐湖 L i的储量大、Mg/ L i比值高、卤水 L i含量较高 ,南部西藏盐湖 L i的储量较大、Mg/L i比值低 ,L i含量很高。青藏高原富 L i盐湖主要分布在氯化物型—硫酸盐型过渡区内 ,其 L i含量在 12 0～ 2 6 0 m g/L之间 ;西藏富 L i盐湖主要分布在碳酸盐型—硫酸盐型过渡区内 ,其 L i含量在 2 5 0～ 6 6 0 m g/ L之间。在西藏各类盐湖中碳酸盐型盐湖含 L i较低 ,这很可能与其参加到早期沉淀的碳酸盐矿物晶格中有关。盐湖卤水中 L i的空间分布与其水源补给方向和蒸发环境紧密相关。Mg/ L i比值研究表明 ,盐湖中 Mg和 L i的含量成反比关系 ,即高 Mg环境不利于 L
The Tibetan Plateau is main distribution region of rich Li salt lakes in China, the content of lithium varies from 2.8 to 2926 the latter is the greatest value of the salt lakes all over the plateau. Li rich salt lakes on Tibetan Plateau are mainly situated in the hydrochemical transition zone: the north(Qaidam Basin) Li rich lakes are in the zone of chloride and sulfate type salt lakes, the south(Tibetan Autonomous Region)Li rich lakes are in the zone of carbonate and sulfate type salt lakes. Li reserves is much larger, Mg/Li ratio higher and Li content low in the north salt lakes (in Qaidam Basin) than in the south salt lakes(in Tibetan Autonomous Region). Our study shows that there are inverse ratio between Li and Mg contents in the brine, namely, Li content increases when Mg content decreases. Li content in the salt lake of carbonate type are relatively low in Tibet, this is results of Li taking part in carbonate mineral crystal lattice. Space distribution of Li in a salt lake is determined on water resource replenishment and evaporation condition.
出处
《盐湖研究》
CSCD
2001年第1期55-61,共7页
Journal of Salt Lake Research
基金
中国科学院"西部之光"资助项目
