黑龙江乌拉嘎金矿田不同地质体稀土元素特征及其地质意义  

Geochemical Characteristics and Significance of REE in Different Geological Bodies in Wulaga Gold Deposit,Heilongjiang Province,China

作　　者：胡云沪[1,2] 陈远荣[1,2] 孙芹[3] 

机构地区：[1]桂林理工大学广西地质工程中心区重点实验室,广西桂林541004 [2]桂林理工大学地球科学学院,广西桂林541004 [3]西北大学地质学系,陕西西安710069

出　　处：《矿物学报》2010年第3期373-378,共6页Acta Mineralogica Sinica

基　　金：广西重点实验室基金(桂科能07109011-Z011);中国黄金集团攻关项目(ZJ2008001);广西地质工程中心重点实验室资助项目

摘　　要：对比黑龙江乌拉嘎金矿不同地质体的稀土元素地球化学特征,发现稀土元素总量从普通围岩、蚀变围岩到花岗(闪长)斑岩再到矿体有逐渐降低的变化规律,英安岩和花岗(闪长)斑岩的稀土元素配分模式相似,而金矿石与矿区内其它地质体的稀土元素配分模式、矿区特征元素与稀土元素的蛛网图均不相同,表明英安岩与花岗(闪长)斑岩在成因上有着密切关系,它们可能为同源岩浆产物。而目前所探明的金矿体虽然在空间上与花岗(闪长)斑岩密切相关,但在成因上两者没有必然联系,花岗(闪长)斑岩体只相当于一个普通的容矿围岩。在该区今后的找矿工作中,不应仅限于在花岗(闪长)斑岩体内有利部位找矿。Base on analysis and comparison of the REE’s geochemistry characteristics of different geological bodies in Heilongjiang Wulaga gold deposit,it is found that the concentrations of ∑REE decrease gradually from common wall rocks,altered rocks,granite-porphyry （granodiorite-porphyry） to gold ore bodies.The REE distribution pattern of dacite is similar to that of granite-porphyry （granodiorite-porphyry） .But the REE distribution patterns and spider diagrams of gold ore bodies of other geologic bodies are different greatly..It means that dacite and granite-porphyry （granodiorite-porphyry） have closer relationship in origin and may be come from same igneous magma.However,even though all known gold ore bodies have closer relation with granite-porphyry in space,but not in origin.Porphyry granite is just a kind of normal wall rock for gold bodies.Attention should not just be limted on inner porphyry granite bodies for future exploration.

关 键 词：稀土元素 配分模式 蛛网图 乌拉嘎金矿 黑龙江 

分 类 号：P597[天文地球—地球化学] P612[天文地球—地质学]