摘要
巴音杭盖金矿区分布华力西期斜长花岗岩和下元古界宝音图群地层。辉绿岩、煌斑岩、花岗斑岩及石英脉形成于华力西期以后。其中辉绿岩和煌斑岩是典型的幔源岩 ,花岗伟晶岩则是典型的壳源岩。H、O、S、Pb同位素研究表明 ,来源于地幔的流体有以下两方面的作用 :1 )促使下部古老岩石中金的活化及壳、幔源岩浆的形成 ;2 )形成迁移金的介质。
The Variscan plagiogranite and Lower Proterozoic Baoyintu group are distributed in Bayinhanggai area. The diabase, lamprophyre, granite porphyry and quartz veins are formed after Variscan period. The diabase and lamprophyre are typical mantle source rock while the granite pegmatite is typical crustal source rock. The study of H, O, S, Pb isotopes indicates that the fluid from the mantle has two functions: 1) impelling the gold active in the deep paleostrata and forming the crustal and mantle magma; 2) carrier of wandering gold.
出处
《黄金地质》
2000年第1期38-43,共6页
Gold Geology
关键词
金矿床
稀土元素
同位素
内蒙古
gold deposit
REE
H,O,S,Pb isotopes
Inner Mongolia
