南岳地区全风化花岗岩的微观特性  

Research on Micro Properties of Nanyue Completely Decomposed Granite

作　　者：赵柳[1] 陈秋南[1] 李建新[1] 赵磊军 

机构地区：[1]湖南科技大学土木工程学院,湘潭411201

出　　处：《湖南工程学院学报（自然科学版）》2013年第4期68-72,共5页Journal of Hunan Institute of Engineering(Natural Science Edition)

基　　金：国家自然科学基金资助项目(41172275)

摘　　要：采用扫描电子显微镜、能谱仪及X射线衍射仪对南岳地区全风化花岗岩的微观特性进行分析.研究发现,在不同放大倍数条件下原状全风化花岗岩微观结构依次为团粒状结构、块状结构、片状结构、层状结构.微观结构松散,孔隙发育,矿物边缘清晰,结构中胶结物质较少,表明颗粒间的连接力较弱.能谱分析发现,不同微观结构的全风化花岗岩所含元素种类及原子百分比可能相同,表明两种结构单元为同一种矿物成分风化形成的,或者一种结构单元是另一种结构单元风化形成的产物.XRD谱表明,该地区全风化花岗岩主要的矿物成分为石英、高岭石、白云母、正长石及少量锆石等矿物.Nanyue completely decomposed granite is analyzed by scanning electron microscope, energy dis- persive spectrometer and x-ray diffractometer. The microstructure of original completely decomposed gran- ite is granular structure, block structure, flake structure and layer structure under the condition o{ differ- ent magnification. Loose structure, developed pores, clear mineral edge and less cementing material show that binding strength is weak. Energy spectrum analysis finds that element types and atomic percentage different microstructure of completely decomposed granite may be the same. Two types of structural unit is derived from the same kind of mineral composition formed by weathering or a structural unit is derived from the other unit formed by weathering. XRD spectrum shows that the main mineral of Nanyue com- pletely decomposed granite is quartz, kaolinite, white mica, orthoclase and a little zircon.

关 键 词：微观结构 矿物成分 全风化花岗岩 能谱分析 

分 类 号：P583[天文地球—岩石学]