逆冲推覆构造在闽西北官岭下地段出露特征形成机制及其成矿作用

官岭下地属于福建省蒲城县山下镇官岭下村,地质上崇安－蒲城地区华竹坑火山盆地东南部边缘,区内火山岩热液活动频繁,尤其是侏罗系晚期火山的构造岩浆活动强烈,形成了较多铀、钼多金属成矿的含矿主岩—酸性火山岩。工作区内官岭下断裂是一条北东向长期活动的构造岩浆活动带,也是一条大型的逆冲推覆构造,该构造早期控岩、控盆、晚期控矿,目前在构造带下盘火山岩中发现了较好的工业铀矿体及一大批异常。通过进一步工作预测深部找矿空间存在,可能有富大矿体。

Outcrop characteristics, formation mechanism andmineralization of thrust nappe structure in northwest Fujian Guanling area

The lower part of Guanling belongs to guanling village, Shanxia Town, Pucheng County, Fujian Province. Geologically, the southeastern margin of huazhukeng volcanic basin in Chongan Pucheng area has strong tectonomagmatic activity, especially in the late Jurassic volcanic activity, forming the main ore bearing rock acid volcanic rock for uranium and molybdenum polymetallic mineralization. The lower Guanling fault is a NE trending tectonomagmatic active belt. It is also a large thrust nappe structure, which controls rock, basin and ore in the early stage. At present, good industrial uranium ore bodies and a large number of anomalies have been found in the volcanic rocks at the footwall of the structural belt. It is predicted that there is a deep prospecting space and there may be rich ore bodies.