内蒙古常福龙金矿成矿构造动力学研究

逆冲推覆构造间接控制了矿床的空间展布,其下盘发育的底板韧性剪切带、脆性逆断层及其叠加的晚期正断层构成了一套成矿构造组合。逆断层和正断层之间所夹即为矿体。断层侧列扩展造成矿体侧列分布,断层作用往北西方向逐渐减弱,造成矿体向北西倾伏至尖灭。热液成矿期可分为四个阶段,第一阶段脉状硅化,成矿作用较弱；第二阶段面状硅化-黄铁矿化,矿化强度和矿化规模均较弱,成矿贡献较小；第三阶段弥散状或脉状硅化-黄铁矿化,矿化强度和矿化规模均较强,形成工业矿体；第四阶段团块状和细脉状碳酸盐化,金成矿作用较弱。

Metallogenic tectonic dynamics research of Changfulong gold deposits in Inner Mongolia

The thrust nappe structure indirectly controls the spatial distribution of the deposit. The ductile shear zone, brittle reverse faults and its superimposed late normal faults on the footwall constitute a set of metallogenic structure assemblage. The ore body is sandwiched between the reverse fault and the normal fault. The lateral expansion of the fault controls the lateral distribution of the ore body, and the fault gradually weakens in the northwest direction, causing the ore body dipping to the northwest. The mineralization period can be divided into four stages. The first stage is vein-like silicification with weak mineralization. In the second stage of planar silicification-pyrite mineralization, the intensity and scale of mineralization are both weak. In the third stage, dispersive or vein-like silicification-pyrite mineralization is developed, and the intensity and the scale of mineralization are both strong, forming industrial ore bodies. In the fourth stage, agglomerates and veinlets is carbonated and gold mineralization was weak.