新邵高家坳微细浸染型金矿床构造控矿特征

高家坳金矿床位于白马山－龙山EW向构造带中部、桃江－城步NE向基底断裂与邵阳－郴州NW向基底断裂挟持的大乘山穹隆SW倾伏端。含金蚀变带赋存于中泥盆统半山组碎屑岩中，金矿体呈似层状顺层产出或呈透镜状、脉 状产于断裂破碎带中。基底断裂沟通矿源层，形成矿液运移通道；穹隆倾伏端和基底断裂提供了储矿空间；次级NW、NE向断裂是矿区主要容矿构造；基底断裂挟持的上升地块中不同级别、不同方向断裂的交汇处，是该类金矿床成生的有利部位。

THE DEPOSIT-CONTROLLED CHARACTERISTICS OF Au-DEPOSIT IN GAOJIA AO MECRO-IMPREGNATION, XINSHAO

The Au-deposit in GaoJiaao located in middle of structure zone east-west oriented of Baima Mountain-Long Mountain, in SW incline-down end in the arched roof of Dacheng Mountain between the basement fault in Taojiang-Chengpu NE direction and the basement fault in Shaoyang-Chenzhou NW direction, with Au-bearing alternation zone exists in dross rock of Banshan formation, Middle Devonian system, and the shapes of Au-ore body as layer, lens and veins. The goes through layers of mine-bring, forming channels for liquid ore-bearing to move, with incline-down end in the arched roof and basement fault offering room to store up ore, and second grade fault of NW and NE the main structure of ore-bearing. The join-spot of fault with different class and direction in rising andsupporting basement-crack is favorable place to form the sort of gold-deposit.