马桥磷矿区逆冲断层特征及找矿潜力

Characteristics of thrust faults and prospecting potential in phosphorus mining area of Maqiao

马桥磷矿区逆冲断层平面上近东西向平行排列,剖面上显示从北向南逆冲,呈叠瓦状排列,最大推移距离超过4km;因逆冲断层的影响,区内地层产状发生不同程度变化,从北到南断层破坏程度加剧;区内含磷岩系近东西向多次重复出现,工业磷矿体的厚度变化及局部不可采区的出现可能与逆冲断层有关。通过分析逆冲断层对磷矿体的影响,认为在马桥矿区以东、菜子岭矿段以东及以西、塞沟矿区与秦蔡垭矿区之间的范围,其深部可能存在工业磷矿体。

The thrust faults in phosphorus mining area of Maqiao show parallel features near the east-west direction on the plan.The section shows a fault thrusting from north to south in a imbrication,and the maximum travel distance is more than 4km.Due to the impact of the thrust fault,the occurrence of strata in the area varies in different degrees and increased damage to strata from north to south.The phosphate-bearing rock system in the area has repeatedly appeared in the near east-west direction.The thickness change of the industrial phosphate ore body and the appearance of local unworkable areas may be related to thrust faults.By analyzing the impact of thrust faults on the phosphate orebody,it is believed that east of Maqiao mine area,east and west of Caiziling ore section,between Saigou mine area and Qincaiya mine area,there may be industrial phosphate orebodies in the deep part.