扎仓茶卡盐湖硼矿富^10B矿床特征及成因探讨

硼在自然界有两种稳定同位素^11B和^10B，天然丰度分别为80．22％和19．78％。10B对具有强辐射能力的伽马射线具有良好的阻挡作用，^10B的热中子的吸收截面大，在多种领域均有广泛应用。扎仓茶卡盐湖沉积硼矿床^10B含量均值高于天然丰度值，富硼镁石矿石硼含量高，杂质少，属优质硼矿资源，具有特殊的社会经济价值，具备核用硼源加工供应基地的基本条件。在总结扎仓茶卡盐湖硼矿富10B矿床特征的基础上，对硼的富集及其同位素分馏机理进行了必要探讨。

10B-rich Deposit Features and Causes of Zhacang Chaka Salt Lake,

Boron has two kinds of stable isotopes in nature, n B and 10B,of which the natural abundances being 80. 22% and 19. 78%. With significant blocking function to strongly radioactive gamma-ray and bigger absorption cross-section of 10B for thermal neutrons than other protective materials, boron has been widely used in industrial,equipment and medicine fields. The content of 10B of the salt lake sedimentary boron ore in Zhacang Chaka area is much higher than the natural abundance boron. Containing high boron content and less impurity, rich-szaibelyite ore in Zhacang Chaka with particular social and economic val- ue ,belongs to high-quality boron ore resources and can be the processing supply base of special boron source. Based on the analysis of the 10B-rich deposit features in Zhacang Chaka,this paper discusses the enrichment of boron and isotope fractionation mechanism.