我国寻找超大型陆相火山岩型铀矿床的潜力评估

国外早己发现了超大型陆相火山岩型铀矿床 ,但我国迄今尚末找到。我国有广泛分布的陆相火山岩 ,能否找到此类超大型铀矿床 ,这是当前火山岩铀矿地质工作者急待解决的重要课题。本文在剖析了世界上已发现的超大型陆相火山岩型铀矿床的成矿环境和成矿条件及我国大型陆相火山岩型铀矿床成矿特点的基础上 ,对我国陆相火山岩的时空分布规律及我国主要构造火山岩带成矿潜力作了评述 ,综合得出在我国找到超大型陆相火山岩型铀矿床是有可能的 ,并确认赣杭、南岭、燕辽、大兴安岭等构造火山岩带具备形成超大型陆相火山岩型铀矿床的地质条件。上述主要构造火山岩带与其它构造火山 ( -侵入 )岩带交汇重叠部位 ,是最有希望的突破区。

ASSESSMENT OF PROSPECTING POTENTIALITY FOR SUPERLARGE CONTINENTAL VOLCANIC ROCK-TYPE URANIUM DEPOSITS IN CHINA

The superlarge continental volcanic rock type uranium deposits,which were discovered abroad long ago,have not yet been reported up to now in China.This is an important problem that needs to be urgently solved by uranium geologists at present.In this paper,on the basis of metallogenic settings and geological conditions of the superlarge continental volcanic rock type uranium deposits discovered in the world along with the metallogenic characteristics of those of the same type in China,the space time distribuion patterns of continental volcanics and the metallogenic potential of main tectono volcanic belts in China are discussed,and a synthetic conclusion has been drawn that there is a possibility to discover the superlarge continental volcanic rock type uranium deposits in China. Moreover,it is evi denced that the Ganhang,Nanling,Yanliao,Da Hinggan Ling and other tectono volcanic belts possess favorable geological conduitions for the formation of superlarge ore deposits of the continental volcanic rock type.The intersecting and overlapping locations of the aforementioned main belts with other tectono volcanic (intrusive )belts are the most potenital areas where the superlarge continental vol canic rock type uranium depositss would be found.