贵州桐梓大岗萤石矿床控矿因素及找矿标志初步探讨  

Premary Sudy of The Metallogenic Controlling Factors and Prospecting Criteria of Dagang Fluorite Deposit in Tongzi,Guizhou Province

作　　者：吴波 王波 强希润 朱华利 张朝修 陈启飞 WU Bo;WANG Bo;QIANG Xi-run;ZHU Hua-li;ZHANG Chao-xiu;CHEN Qi-fei(Guizhou Geological Survey,Guiyang 550081,Guizhou,China)

机构地区：[1]贵州省地质调查院,贵州贵阳550081

出　　处：《贵州地质》2024年第4期395-402,共8页Guizhou Geology

基　　金：省级地勘基金项目《贵州1∶5万兴隆场幅(H48E020020),松坎幅(H48E021020),新站幅(H48E022020)矿产地质调查》(黔自然资函[2023]119号);中国矿产地质志项目(DD20221695-27)联合资助。

摘　　要：大岗萤石矿床大地构造位置位于扬子陆块上扬子地块黔北隆起区毕节弧形褶皱带与凤冈南北向隔槽式褶皱变形区结合部位,属尧龙山-坡渡萤石矿成矿带北段。萤石矿主要受北西向和北东向构造控制,萤石矿体主要产于背斜核部虚脱空间部位,矿体走向330°~350°或35°~40°。萤石矿赋矿地层为娄山关组、桐梓组第一段及第三段,矿体呈似层状、脉状产于白云岩层间裂隙或陡倾裂隙中,萤石矿颜色为浅紫色、紫色、白色,矿石CaF2含量一般在30%~50%左右。围岩蚀变主要有萤石矿化、白云岩化、方解石化、硅化、褐铁矿化等。分析认为,本区萤石矿具有地层和构造双重控矿的特点,提出了地层、构造、地球物理、地球化学、围岩蚀变、采坑遗迹及转石等找矿标志。The Dagang fluorite deposit is located at the junction of the Bijie arc fold belt in northern Guizhou area of upper Yangtze block,Yangtze landmass and the north-south trough-type fold deformation area in Fenggang county,it belongs to the northern part of the yaolongshan-pudu fluorite metallogenic belt.The fluorite deposit is mainly controlled by NW and NE structures.The fluorite orebody occurs mainly in the depleted space of anticline core,and the strike of the orebody is 330°-350°or 35°-40°.The host strata of the fluorite deposit are the first and third members of loushanguan formation and Tongzi County Formation.The ore bodies are bedded and veined in interbedded fissures or steep dip fissures of dolomite.The color of the fluorite deposit is light purple,purple and white,the content of CaF 2 in ore is about 30%50%.Wall rock alteration mainly includes fluorite mineralization,dolomite mineralization,calcite mineralization,silicification,limonite mineralization and so on.The analysis shows that the fluorite deposit in this area is controlled by both strata and structures,and the prospecting criteria,such as strata,structure,geophysics,geochemistry,wall rock alteration,pit trace and turnover stone,are put forward.

关 键 词：大岗萤石矿床 控矿因素 找矿标志 桐梓 贵州省 

分 类 号：P619.215[天文地球—矿床学]