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洛帆-大沟金矿(化)区位于扬子准地台西南缘与右江造山带的衔接部位,处于赖子山背斜南东翼及背斜南西倾伏端。研究区西部主要为开阔台地相的浅水碳酸盐岩;东部为台地边缘斜坡相的碳酸盐岩和砂泥岩组合,岩性或相变接触,或尖灭缺失,局部断层接触,厚度变化大,古地理环境较为复杂。区内主体构造线为北东向,表现为褶皱与断裂构造,主要为北东向展布的赖子山复式背斜和分布在背斜两翼与之平行
The Luofan-Dagou gold deposit is located at the junction of the southwestern margin of the Yangtze Platform and the Youjiang orogenic belt, and is located at the south-eastern wing of the anticline and the south-west dip of the anticline. The western part of the study area is mainly composed of shallow carbonate rocks with open platform facies. In the eastern part, there are carbonate and sandstone-mudstone assemblages with lithological or facies changes or extinction, partial fault contact and thick changes , Ancient geography environment is more complicated. The main tectonic line in the area is NE direction, showing folds and faults. The LaiZishan duplex anticline is mainly distributed in the northeast and is parallel to the two anticlinal wings