The Jiuyishan complex located at Hunan Province, Jiuyishan district, South China, is composed of five granitic plutons (Xuehuading, Jinjiling, Pangxiemu, Shaziling and Xishan). The Zhengchong Li-Rb-Cs deposit is a greisen-type deposit hosted by the Jinjiling granite, adjacent to the Pangxiemu granitic pluton. Based on textures, three types of greisen may be distinguished at Zhengchong: medium-grained massive greisen, feldspar-phyric greisen and quartz-phyric greisen. Detailed studies on field occurrence, petrographic observations, whole-rock and mineral geochemistry reveals that the Jinjiling granites represent the protoliths of the greisen mineralization and not the Pangxiemu granites. Metasomatic alteration of different phases of the Jinjiling granites formed at least three greisen types mentioned above. The medium-grained greisen and quartz-phyric greisen are totally altered, but the feldspar-phyric greisen are relatively less altered with residual feldspar phenocrysts. We also propose three main indications for ore deposit exploration in this area: future mineral exploration in the district should focus on the periphery of the Pangxiemu pluton, particularly along structures, where greisen alteration has been developed in places.

九一山群位于湖南省华南九一山区，由雪花顶、金鸡岭、庞歇木、沙子岭和西山5个花岗岩岩体组成。正冲Li-Rb-Cs矿床是金鸡岭花岗岩赋存的灰森型矿床，毗邻庞歇木花岗岩体。根据质地，郑冲可区分出三种类型的灰岩：中粒块状灰岩、长石岩灰岩和石英岩灰岩。对野外产状、岩相观测、全岩和矿物地球化学的详细研究表明，金鸡岭花岗岩代表了灰岩矿化的原岩，而不是庞歇木花岗岩。金鸡岭花岗岩不同相的交代蚀变至少形成了上述三种灰岩类型。中粒灰岩和石英岩灰岩完全蚀变，长石岩岩蚀变相对较少，残留长石斑晶。我们还提出了该地区矿床勘探的三个主要迹象：该地区未来的矿产勘探应集中在庞斜木岩体的外围，特别是沿构造，在那里已经发育了greisen蚀变。