并对青海大柴旦地区和湖北潜 江地区的石盐中的硼进行了提取和同位素组成的测定；
The isotopic compositions of boron in halites from Qaidam Basin, Qinghai Province and Qianjiang, Hubei Province were measured.
在青海大柴旦地区有大量的柱硼镁石矿由于品位低下（低于10%），不能直接用作生产硼化学品的原料。
There is a large number of pinnoite ore in Dachaidan area of Qinghai province, these boron resources can not be directly used as raw materials for boron chemicals because of low grade (less than 10%).
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