庐枞火山盆地铀矿地质特征及成矿控制因素

Geological characteristics and metallogenetic factors of uranium deposits in Luzong volcanic basin

安徽庐枞火山盆地位于长江中下游成矿带中段,燕山期强烈的构造-岩浆活动孕育了盆地内铀成矿作用。在整理前人勘查及研究成果基础上,对铀矿地质特征进行了分析,总结了成矿控制因素。庐枞火山盆地铀矿与潜火山岩具密切时空和成因关联,铀成矿受潜火山岩、构造及地层岩性综合控制,但潜火山岩浆侵入作用是成矿关键因素。后续铀矿找矿工作,在对潜火山岩体外围有利空间勘查的同时,尤其要加强寻找与隐伏岩体有关的隐伏矿体,以实现铀资源扩大的预期。

Luzong volcanic basin in Anhui is located in the middle of Middle-Lower Yangtze River metallogenic belt. Strong Yanshanian tectonic-magmatic activity breeded the uranium mineralization in the basin. Based on reorganizing the previous exploration and research results, this paper analyzed the geological characteristics of the uranium deposits and summarized the metallogenetie factors. Uranium deposits in Luzong volcanic basin are associated with subvolcanic rock in time, space and genesis. Although the uranium mineralization is controlled by the subvolcanic rocks, tectonics and formation lithology, the intrusion of subvolcanic magma is the key factor of mineralization. In order to realize the expectation of enlarging the uranium resources, the subsequent uranium prospecting work should explore the advantageous outside space of the subvolcanic rock mass, especially find the concealed uranium ore body which is connected with the concealed rock mass.