赣中抚州—永丰断裂新构造活动踪迹及其找矿意义

抚州—永丰断裂作为江西省德兴—遂川断裂带的组成部分,通常认为是一条长期活动的控岩控盆控矿断裂。研究发现,该断裂在挽近时期具有明显新构造活动的踪迹,如清晰的线性影像、构造地貌单元分界线与断裂走向一致、具有地震活动纪录、温泉沿断裂分布等,表明该断裂是新构造。断层角砾岩特征及地层错移关系显示为右行正断层,南东盘向南东方向下滑,致使断裂两侧侵蚀深度或保矿条件明显不同:北西侧处上升盘,侵蚀深度较大,玉华山盆地体找铀潜力受限;南东侧处下降盘,侵蚀深度较小,上白垩统红层较厚,保矿条件良好,相山矿田北西部及红层深部具有较大的找铀远景。

The neotectonic activity trail of Fuzhou-Yongfeng fault and its significance to uranium ore cxploration in central Jiangxi province

Fuzhou-Yongfeng fault belonging to Dexing-Suichuan fault zone is generally considered a long-term active rock-controlling, basin-controlling and ore-controlling fault. Neotectonic trail is evident in the fault, such as its clear imagery lineament, coincidence of landform boundary with its strike, seismic activity and spring distribution along it. The fault breccia characteristics and displacement of the strata show that it is a dextral normal fault and its SE plate slips down to SE leading to different erosion and different protection of ore on either sides of the fault. The NW plate rises and is heavily eroded and limits the uranium prospecting potential. The SE plate falls down with less erosion and thick Cretaceous red cover is good ore protection condition. The NW Xiangshan ore field and deep part beneath the red bed are potential for further uranium prospecting.