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我们已积累了大量值得考虑的有关硼在各种岩石中(包括那些对硼的成矿作用有经济价值的岩石)的分布数据。石灰岩中硼的含量范围为0.5～300ppm,白云岩中硼的含量范围为5—700ppm,硼主要以泥质混合物或分散细晶硼矿物的形式存在。化学性质较纯的粗粒结晶方解石一般不含硼,硼若存在,其数量至少要超过十分之几ppm。变质岩中的硼含量要比同类岩石中受蚀变的硼含量少。对于具有和不具有硼矿化阼用的镁质和钙质的矽卡岩,矿物的空间分布和局部射线(x)分析的研究表明,在分析灵敏度的极限内(几个ppm)测得方解石结构中缺少硼。
We have accumulated a great deal of data that is worth considering about the distribution of boron in rocks of all kinds, including those that are economically valuable for the mineralization of boron. Boron content in limestone ranges from 0.5 to 300 ppm, boron content in dolomites ranges from 5 to 700 ppm, and boron is predominantly in the form of a muddy mixture or finely divided boron mineral. The more chemically pure, coarse-grained calcite is generally boron-free, with boron present in excess of at least a few tenths of a ppm. Boron content in metamorphic rocks is less affected by alteration than in similar rocks. Studies of the spatial distribution and local ray (x) analysis of minerals with and without magnesia and calcareous skarn for boron mineralization show that calcite is measured within the limits of analytical sensitivity (a few ppm) The lack of boron in the structure.