甘肃党河南山贾公台金矿成矿模式探讨

党河南山贾公台金矿位于祁连山加里东褶皱带,中祁连隆起和南祁连弧后盆地接触部位的南祁连区。金矿体赋存于中下奥陶统上岩组碎屑岩中,含矿岩性为构造角砾岩及碎裂黑云母斜长花岗岩。本文对成矿条件、控矿因素进行了归纳总结,并对中、低温热液蚀变碎裂岩型金矿床成矿模式进行了初步探讨。

Geological Characteristics of Jiagongtai Gold Deposit in Subei County of Gansu Province

Jiagongtai gold mine is located at the Caledonian fold belt in Qilian Mountain, the contact part between rise in the middle Qilian and back-arc basin in the south Qilian. Gold bodies are hosted in the Lower Ordovician upper rock group, lithologically, gold-bearing rock are tectonic breccias and biotite plagiogranite. By analyzing the metallogenic condition and ore-controlling factors, it is believed that it is a lower-moderate thermal alteration cataclasite gold deposit, the source of gold formation mineral is the porphyritic granite intruded during Variscan Period.