论川北砂岩型铀矿床方解石脉与铀矿成矿关系  

ON THE RELATIONSHIP BETWEEN CALCITE VEINS AND URANIUM MINERALLZATION IN THE SANDSTONE-TYPE URANIUM DEPOSIT IN NORTHERN SICHUAN

作　　者：朱酉养 

机构地区：[1]西南地勘局地质处,四川广汉618300

出　　处：《铀矿地质》1993年第1期35-42,共8页Uranium Geology

摘　　要：对以303和1210两矿床为代表的川北砂岩型铀矿床的野外调查、方解石脉的岩矿鉴定、包裹体测试、微量元素和铀含量分析、脉体与矿化围岩蚀变关系的研究得出:方解石脉由中低温热水充填裂隙形成,热水同时活化汲取围岩中的铀,搬迁到构造裂隙发育、富含有机质的地段再沉淀富集。迭加成矿。Field investigation, identification of rocks and minerals from calcite veins, inclusion determination, analysis of trace elements and uranium contents, and the study of relationship between veins and wall rock alteration in sandstone-type uranium deposits (No. 303,No. 4210) in northern Sichuan show that calcite veins were formed by filling in fissures with mesothermal and epithermal water which mobilized and extracted uranium from wall rocks in the mean time. and uranium was transported to the portion and precipitated where structural fissures were developed and host rocks were enriched in organic matter, and thus resulting in concentration and superimposition and ore formation. The sandstone-type uranium deposits in northern Sichuan are of thermal water reworking in origin.

关 键 词：川北 砂岩型铀矿床 方解石脉 热水改造成矿 

分 类 号：P5[天文地球—地质学]