赣粤界山发现花岗伟晶岩型铍多金属矿

花岗伟晶岩型稀有金属矿床主要产出于后碰撞到非造山构造背景，同期多阶段复式岩体中，侧向侵位的晚阶段高分异花岗岩是有利的成矿母岩。南岭成矿带发育稀有金属矿化的花岗岩很多，花岗伟晶岩型稀有金属矿床却较罕见。贵东岩体具备花岗伟晶岩型稀有金属的成矿条件，“界山”有利于矿体保存。笔者通过野外查证，在贵东岩体赣粤界山附近的龟尾山和牛牯石地段均发现含绿柱石花岗伟晶岩，该花岗伟晶岩脉铍矿化强烈，脉体规模和矿物分带性特征表明其找矿潜力大，综合利用价值高。此发现不仅补充了南岭成矿带的稀有金属成矿类型，还表明二（白）云母花岗岩的小岩体周边也有可能发现花岗伟晶岩型铍多金属矿床。

Discovery of granitic pegmatite type beryllium polymetallic deposit in border mountains between Jiangxi and Guangdong Provinces

There are many rare metal mineralization bearing granitic rock masses in the Nanling metallogenic belt, but granitic pegmatite type rare metal deposits are rare. The comprehensive research regards that post collision to anorogenic tectonic background is the main producing environment of granitic pegmatite, and highly differentiated granite of the same period, multi-stage, and lateral emplacing batholith is a favorable metallogenic parent rock of granitic pegmatite type rare metal deposit. The Guidong batholith in boundary mountains between Jiangxi and Guangdong Provinces has the ore forming conditions of granitic pegmatite type rare metals, and the boundary mountains is conducive to the preservation of ore bodies. The authors found beryl bearing granitic pegmatite in Niugushi area and Guiweishan area of the Guidong batholith by field investigating. The beryllium mineralization of granitic pegmatite vein is intense, and the scale and the minerals zoning characteristics indicate that these veins have great prospecting potential and high comprehensive utilization value. This discovery not only supplements the rare metal metallogenic type of the Nanling metallogenic belt, but also indicates that it is possible to find granitic pegmatite type lithium polymetallic deposits around the small rock mass of two mica (or muscovite) granite.