大容山花岗岩体位于桂东南地区,呈北东向巨大长条状岩基产于云开大山后加里东隆起的西北侧晚古生代以来长期活动的北东向断裂带内,为一复式岩体,主体由堇青石黑云母花岗岩组成,可分内部相、过渡相、边缘相,最边缘还有紫苏辉石花岗斑岩出露。岩体以普遍含包体,暗色团块,堇青石、硅线石、石榴石等矿物为特征。岩体不同部位主要矿物成分变化不大(表1),多属花岗岩,局部相变为二长花 The Taiyanshan granite body is located in the southeastern Guangxi area and is a long-active north-east fault zone in the north-east of the Caledonian uplift, , The main body is composed of cordierite biotite granite, which can be divided into internal facies, transitional facies, marginal facies, and the peri-pyroxene granite porphyry. Rock mass is generally characterized by inclusions, dark clumps, cordierite, sillimanite and garnet. The main mineral components in different parts of the rock mass have little change (Table 1), mostly belong to granite, the local phase change into two long flowers