粤东北仁差盆地麻楼逆冲推覆构造特征与铀成矿作用

Features and uranium mineralization of Malou thrust nappe structure in Rencha basin of northeast Guangdong

仁差盆地为中新生代陆相火山岩断陷盆地（K2-E）。区内构造岩浆活动强烈且频繁,特别是晚期火山活动强烈,形成铀钼多金属矿的含矿主岩——酸性火山岩。麻楼构造带是一条东西向长期活动的构造岩浆活动带,也是一条线型火山喷发带。经过近期的勘查研究,笔者认为麻楼构造（F1）是一条逆冲推覆构造。该构造早期控盆、控岩,晚期控矿。目前在构造带的深部发现了较好的工业铀矿体,预测在500~1500 m的深部找矿空间存在大、富铀矿体。

Rencha basin was a Cenozoic volcanic fault basin（K2-E）.Due to strong and frequent tectonic-magmatic activities,especially the late volcanic activities in the region,the acidic volcanic rock was formed which is the host rocks of uranium-molybdenum polymetallic deposit.Malou structural belt is a east-west trending and a long-term tectonic-magmatic activities belt,and is also a linear structure of volcanic eruption.Through recent exploration and study,Malou structure（F1）was found to be a thrust nappe structure.In the early stage of evolution,the structure controled the formation of Rencha basin and rock distribution,in the later,it controled the formation of uranium mineralization.Because farely rich orebody has been discovered in some deep part of the structure,large and richer orebody can be predicted in the depth of 500～1500 m.