芨岭地区铀矿地质—地球物理特征研究  

A study of geological-geophysical characteristics of uranium deposits in Jiling pluton

作　　者：宋振涛[1,2] 祁程 韩栋昱[1,2] 刘波 张伟 何欣昕[1,2] 孙栋华 魏滨[1,2] 梁永顺 SONG Zhen-Tao;QI Cheng;HAN Dong-Yu;LIU Bo;ZHANG Wei;HE Xin-Xin;SUN Dong-Hua;WEI Bin;LIANG Yong-Shun(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,China;CNNC Key Laboratory for Geophysical Exploration Technology Center of Uranium Resource,Shijiazhuang 050002,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]中核集团铀资源地球物理勘查技术中心(重点实验室),河北石家庄050002

出　　处：《物探与化探》2018年第5期909-916,共8页Geophysical and Geochemical Exploration

基　　金：中国核工业地质局基础地质专项(201426;201544;201735)

摘　　要：通过对龙首山铀成矿带芨岭岩体铀矿床进行研究,认为该地区不同类型铀矿化,虽然含矿主岩不同,但是矿床形成过程具有类似性,即都属于断裂构造控矿,并经历了岩浆分异、岩体边缘富集、热液活动等地质过程,铀元素分异、迁移及富集机理也具有相似性。矿床所处的地球物理场亦可进行类比,通过深入研究对比3类典型铀矿床(硅质脉型、隐爆角砾岩型、碱性杂岩型)的地球物理特征,发现铀矿床一般位于强弱磁异常过渡地带偏弱磁异常一侧,电阻率断面图中多位于高低阻梯度变化带或中低阻区,电阻率平面图中多位于中低阻过渡带偏低阻一侧,认为电、磁强弱异常过渡地带偏弱场区可以作为地球物理找矿标志。Through the study of ore deposit geology of uranium deposits in Jiling pluton of Longshoushan metallogenic belt,the authors hold that,although the ore-bearing sandstones are different,different types of uranium mineralization have some similarity in that the ore deposits all underwent such evolution processes as magmatic differentiation,enrichment at the edge of rock mass,and hydrothermal activity and all exhibit the uranium element differentiation,migration and enrichment mechanism. Deposits of the geophysical field can be compared with each other. Through in depth study and a comparison of physical characteristics of three typical types of uranium deposits（ siliceous veins,cryptoexplosive breccia type,alkaline complex type）,the authors found that uranium deposits are generally located in the transition region between strong and weak magnetic anomalies with some favor to the weak magnetic anomaly side; in the resistivity profile,uranium deposits are mostly located in high and low resistance variation gradient belt or in the middle and lower resistance zone; in the resistivity plan,uranium deposits are located in the middle and lower resistance transition zone with some favor to the low resistivity side. The area of the electric and magnetic intensity anomaly transition zone with some favor to the weak anomaly side can be used as a new geophysical prospecting mark.

关 键 词：硅质脉型 隐爆角砾岩型 裂隙氧化带型 电性特征 磁性特征 芨岭岩体 

分 类 号：P631[天文地球—地质矿产勘探]