黑龙江西林铅锌铁矿田二长花岗岩成矿岩体年龄的确定及其意义  

Determination of ages of metallogenic monzonitic intrusion and geological implication in the Xilin Pb-Zn-Fe ore depsoit,Yichun,Heilongjiang Province granite

作　　者：李树才[1] 韩振哲[2,3] 牛延宏 张跃龙 王兴 程招勋 郑涛 

机构地区：[1]国土资源实物地质资料中心,三河065201 [2]中国地质调查局发展研究中心,北京100037 [3]国土资源部矿产勘查技术指导中心,北京100120 [4]黑龙江省地质调查研究总院齐齐哈尔分院,齐齐哈尔161005

出　　处：《矿产勘查》2015年第4期356-363,共8页Mineral Exploration

基　　金：中国地质调查局地质矿产评价专项项目全国整装勘查规划部署研究(编号:1212011220854)资助

摘　　要：黑龙江省伊春地区西林铅锌铁矿田的小西林铅锌矿床、大西林夕卡岩型铁矿床中,与成矿有关的细中粒似斑状二长花岗岩岩体U-Pb锆石LA-ICPMS年龄分别为(197±1)Ma、(200±1)Ma,表明成岩成矿时代为早侏罗世,且具有与区域上的翠宏山夕卡岩型铁多金属矿床、鹿鸣斑岩型钼矿床的成矿岩体特征相似、成岩成矿时代相近的特征,暗示该地区的钼铅锌铁多金属矿成矿作用的重要性,也说明该地区具良好的铅锌铁钼多金属矿找矿前景。The ages of U - Pb isotope of zircon mineral in the medium to finegrained porphyritic monzonite granites measured by LA - ICPMS in the Xiaoxilin lead - zinc deposit and Daxilin skarn type deposit occurred in the Xilin Pb - Zn ore field of Yichun district located in the southeast of Xiaoxinganling, are （200 ±1 ） Ma and（ 197 ± 1 ） Ma respectively, it indicated that the era of diagenesis and mineralization belongs to early Jurassic period. It also showed that characteristics of metallogenie granites, ages of diagenesis and min- eralization of the two ore deposits are similar with those of Cuihongshan skarn iron poly - metallic deposit and Muming porphyry type molybdenum depositin the region. It implicated the Mo - Pb - Zn - Fe poly - metallic mineralization process played the key role in the study area, and there is great potential for finding Mo - Pb - Zn - Fe deposits.

关 键 词：黑龙江西林铅锌铁矿田 似斑状二长花岗岩锆石LA-ICPMS U-Pb定年成岩成矿时代 

分 类 号：P618.42[天文地球—矿床学] P618.43[天文地球—地质学]