甘肃省天祝县青分岭金矿床矿石特征与金的赋存状态研究

Ore characters and gold occurrences of Qingfenling gold deposit in Tianzhu county,Gansu province

青分岭金矿的矿石类型为石英脉型和蚀变岩型。矿石结构以自形—他形粒状结构为主,矿石构造以浸染状—团粒状、星散状构造为主。金的载体矿物主要为褐铁矿、黄铁矿,也是该矿床的重要找矿标志。金矿物的赋存状态有包裹金、粒间金和裂隙空洞金三种类型,以裂隙空洞金为主,包裹金和粒间金次之。金的形态主要呈角粒状、长角粒状、浑圆粒状,金的粒度较粗,以明金为主,显微金较少。

The ore types of the Qingfenling gold deposit in Tianzhu of Gansu province are quartz vein type and altered rock type. Ore textures are mainly idiomorphic - xenomorphic structure, and the primary ore structures are disseminated-pellets and rosette structure. Pyrite and limonite are Au-carrier minerals, which are important prospecting criteria. The occurrences of gold minerals are wrapped gold, intergranular gold and fissure gold. Most of the gold is fissuring type, and the secondary types are wrapped gold and intergranular. Main forms of gold are angular-granular, long angular-granular and rounded granular. The size of gold is coarse. The most gold is visible, and the micro gold is less.