新疆可可托海矿区水胆海蓝宝石和紫晶产出的地质特征及研究意义

Geologic Features and Research Signication of Water-Bubble Aguamarine and Amethyst Have Occurred in Xinjiang Keketuohai Ore Area

花岗伟晶岩脉沿黑云母片麻岩中的缓倾节理充填，可划分出3～5个结构带．海蓝宝石产于块体微斜长石的晶洞中.紫晶多赋存于烟色石英块体的晶洞中，以平行连生体出现.这与Holden和Sinkankas关于紫晶产出的三种形式（结核状、晶球和杭状）均不相同．强油脂光泽的烟色石英、绿色楔形云母巨晶与绿柱石三者共生，是海蓝宝石和紫晶存在的矿物学标志．这不仅提高了矿脉的综合利用价值，而且也拓宽了阿勤泰花岗伟晶岩型宝石资源的潜在远景．

Granitic pegmatite vein intruded into biotite-gneisis along gentle inclined joint. Divided 3-5 texturezones in the vein. Water-bubble aquamarine occurs in geodes of massive microcline and amethyst in geodes ofmassive smoky guartz or massive microcline. The geodes has a diameter from least 1cm to 80cm. All amethystcrystals are parall intergrowth. The parall intergrowth is diffrent with 3 types (coneretion shape, crystal balland comb shape )that Holden has pointed. This paper points out that 3 types of mineral coexisting in a vein aremineralogy mark of aguamarine and amethyst. They are strong greasy luster smoky guartz,green wedge muscovite great crystaline and beryl minerals. These not only raise using Value of ore diposit oneself,but also unfold a huge prospect that is rich in natural gem resources in Altai.