粤西坡仔营钼矿花岗质岩石成因对比  

Genesis Contrast of Granite from Pozaiying Molybdenum Ore in the West of Guangdong Province

作　　者：安燕飞[1,2] 谈昕[3] 

机构地区：[1]中山大学地球科学系 [2]广东省地质过程与矿产探查重点实验室 [3]安徽省地震局

出　　处：《金属矿山》2013年第12期81-84,共4页Metal Mine

基　　金：中国地质调查局重大公益计划项目(编号:12120113067600);国家自然科学基金项目(编号:41273040)

摘　　要：选取坡仔营钼矿区内所发育的花岗斑岩、石英斑岩、细粒花岗岩和花岗片麻岩,对比分析其稀土组成、石英的电子探针结果及拉曼光谱特征。结果显示,细粒花岗岩与花岗片麻岩稀土组成、石英晶体SiO2含量及其结晶学特征均存在明显差异,二者应形成于不同的成因过程。花岗斑岩及其斑晶组成与细粒花岗岩相似,揭示二者很可能为同源产物;而石英斑岩组成与花岗片麻岩更接近,推测其为花岗斑岩上侵后者混染所致。Some granite samples such as granite porphyry,quartz porphyry,fine grained granite and granite gneiss from Pozaiying Molybdenum Ore in the west of Guangdong province were selected and its REE composition,EPMA and raman spectra characteristics were analyzed. The results showed that there exists distinct difference of the REE composition,quartz crystal SiO2 content and its crystallographic feature between fine grained granite and granite gneiss. Both two are formed in different forming process. Granite porphyry and its phenocryst are similar to that of fine grained granite,revealing that the granite porphyry and fine grained granite may be homologous products. However,the composition of quartz porphyry is more close to granitic gneiss,inferring that it be formed due to contamination by the upper invasion of granite porphyry to granitic gneiss.

关 键 词：稀土元素 电子探针 RAMAN光谱 斑岩钼矿 钦杭结合带 

分 类 号：TD954[矿业工程—选矿]