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花岗伟晶岩型稀有元素矿床在空间分布上具明显的分带现象.在一个伟晶岩田内,不同类型的伟晶岩围绕花岗岩体呈环带状分布,甚至在同一条伟晶岩脉中也具有明显的水平或垂直分带性.现将几个典型花岗伟晶岩田的伟晶岩带状分布特点总结于下,希望能对寻找稀有元素矿床有所裨益. 花岗伟晶岩田带状分布的实例Ⅰ区锂铍伟晶岩田矿田为一轴向北北西的短轴背斜构造,出露中、上三迭纪的粉砂质粘土岩、石英质粉砂细砂岩,夹少量中基性凝灰岩.
In the pegmatite field, different types of pegmatites distribute around the granite bodies in a ring-like pattern, even in the same pegmatite vein Also have obvious horizontal or vertical zoning.We will now summarize the pegmatitic banded distribution characteristics of several typical granite pegmatite fields, hoping to find the rare element deposits beneficial. Example of zonal distribution The lithic beryllium pegmatite field is an axially north-northwest short-axis anticline structure, exposing the middle and upper Triassic silty clay rocks, quartz silt sand and fine sandstone, A small amount of basic tuff.