摘要
内蒙古孟恩陶勒盖矿床产于由黑云母斜长花岗岩和白云母斜长花岗岩组成的海西期孟恩花岗岩基的中心部位。矿体受东西向断裂控制,呈脉状。矿床主要有用组分为Pb、Zn、Cu、Ag,含Sn富In、Ga、Cd等分散元素,为一典型的多元素共生的多金属矿床。矿石铅同位素组成与赋矿的海西期花岗岩和矿区外围燕山期花岗岩的长石及全岩铅同位素组成明显不同,显示出矿石铅既不是由这两期岩浆活动提供的,也不是来自这两期花岗岩的改造。矿石铅与不同期次岩浆岩铅的对比显示,矿石铅来源于地幔岩浆分异,矿区深部可能存在地幔来源的岩浆岩。
Mengentaolegai deposit is occurred in the center of the Hercynian granite batholith which consists of biotite plagioclase granite and muscovite plagioclase granite. The vein type ore bodies are controlled by the east west trend faults. The main useful constituents of the deposit are Pb, Zn, Cu, Ag associated with Sn, In, Ga and Cd, etc. Lead isotopic composition of the ore is different from those of the ore hosted Hercynian granite and the Yanshaniangranite outside the ore region. Lead of the ore is neither derived from the magmatism nor from the reformation of these granite rocks. There are two probable sources of the ore lead. One is the mantle magmatism. It is possible that there is a mantle source magmatic rock in depth of the ore region. Another source is the Precambrian basement metamorphic rocks in the region.
出处
《地球化学》
CAS
CSCD
北大核心
2002年第3期253-258,共6页
Geochimica
基金
国家自然科学基金(40172037)
国家攀登计划预选项目(95-预-25)
关键词
银铅锌铟矿床
多金属矿床
地质特征
铅同位素
内蒙古自治区
岩浆岩
polymetallic deposit
geological characteristics
lead isotopic composition
lead source
Inner Mongolia Autonomous Region
