北方造山带东北段中生代构造─流体─成岩成矿体系及其演化  

THE INTERACTION SYSTEM BETWEEN MESOZOIC TECTONICS,FLUIDS,PETROGENESIS AND MINERALIZATION IN THE NORTHEAST OF THE NORTHERN OROGENIC BELT,CHINA

作　　者：吕志成[1] 段国正[2] 郝立波[2] 李殿超[2] 董广华[2] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学开放实验室,贵州贵阳550002 [2]吉林大学朝阳校区,吉林长春130026

出　　处：《大地构造与成矿学》2001年第2期161-170,共10页Geotectonica et Metallogenia

基　　金：教育部博士点基金 (No.97018701);国家杰出科学家基金(批准号: 49625304)

摘　　要：本文讨论了北方造山带东北段满洲里─额尔古纳地区及其毗邻区中生代构造─流体─成岩成矿系统及其演化的三个不同阶段： 1）早中侏罗世张性“似裂谷环境”下所形成的中基性碱性火山岩、同熔性花岗岩及深源流体活动形成的稀土矿床和斑岩性铜钼矿床； 2）晚侏罗世挤压─剪切环境下所形成的酸性火山岩、斑岩类及深源流体活动所形成的铅锌银矿床； 3）早白垩世张性环境下所形成的基性碱性火山岩及深源流体活动所形成的铀矿床、金银矿床及萤石矿床。在此基础上，建立了区域中生代构造─流体─成岩成矿地球化学一体化系统模型。There is a close relation between Mesozoic tectonic evolution,fluid evolution,petrogenesis and mineralization in the Manzhouli－E’ erguna region in the northeast of the Northern Orogenic Belt,China， and three evolution stages of the Mesozoic tectonic－fluid－petrogenetic and metallogenetic system are proposed out:1) Acompanied by REE and Cu mineralization,the calc－alkaline volcanic rocks and mantle－crust mixed type granite occurred under the regional tension tectonic background caused by the Mongolia－Okhotsk residual ocean that was closing in scissors form in the Early－Middle Jurassic.2)Acompanied by Pb,Zn and Ag mineralization,the calc－alkaline and alkaline volcanic rocks occurred under the regional shear－compression tectonic background in the Late Jurassic.3) Acompanied by U,F,Pb,Zn and Ag mineralization,the calc－alkaline and alkaline volcanic rocks occurred under the regional tension tectonic background in the Early Cretaceous.The Mesozoic magmatism and polymetallic mineralization was caused by interaction between deep－derived fluids and Mesozoic multistage tectonic activities.

关 键 词：中生构 构造-流体-成岩成矿体系 区域构造-流体-成岩成矿模型 控矿作用 造山带 成矿流体 地球化学 

分 类 号：P611[天文地球—矿床学] P59[天文地球—地质学]