黑龙江翠宏山铅锌多金属矿床岩浆岩特征及成矿年龄  

Characteristics of the Magmatic Rocks and Mineralization Age in the Cuihongshan Pb-Zn Polymetallic Deposit,Heilongjiang Province

作　　者：李秀荣[1] 杨宏智[1] 邵军[1] 

机构地区：[1]中国地质调查局沈阳地质调查中心,沈阳110034

出　　处：《地质调查与研究》2011年第2期114-118,138,共6页Geological Survey and Research

基　　金：国土资源大调查项目:黑龙江小兴安岭-张广才岭成矿带铅锌多金属成矿规律研究(200310200052)

摘　　要：翠宏山铅锌多金属矿床产在花岗岩体与下寒武统西林群铅山组变质岩系的接触带内,是一矽卡岩型铅锌多金属矿床。岩浆活动强烈,具有脉动活动特点,形成的岩石类型主要有二长花岗岩、正长花岗岩、碱长花岗岩。总结该区花岗岩岩石地球化学特征后,认为该花岗岩具有由"I"型向"A"型过渡特点,并采用锆石U-Pb方法确定了地表和深部二长花岗岩的形成年龄分别为192.8±2.5 Ma和194.1±1.6 Ma。研究认为,铅锌多金属成矿与此岩浆活动关系密切,成矿作用发生在印支晚期-燕山早期(190-199 Ma)。The Cuihongshan Pb-Zn polymetallic deposit,a skarn type,occurred in the contact metamorphic zone between the granitics and Lower Cambrian Qianshan metamorphic rocks of the Xilin Group.With pulsation character,the magmatic activity is strong,and the rock types are monzogranite,syenite granite,alkali-feldspar granite.Summarized the geochemical features of the granitics in this area,the authors proposed that the granit have the transition charater from I-type to A-type,and the Zrion SHRIMP U-Pb dating method yielt two ages of 192.8±2.5Ma and 199.0±3.1Ma for the biotite monzogranite and monzogranite respectivily.The result reveals that Pb-Zn polymetallic deposit have a very closely relation with magmatic activity,and the ore-forming age is corresponding to Late Indosinian-Early Yanshanian.

关 键 词：岩浆演化 成矿年龄 印支晚期-燕山早期 翠宏山铅锌多金属矿床 

分 类 号：P618.4[天文地球—矿床学]