摘要
前人研究多集中于碱性长石等其他长石系列,对斜长石的研究较少。在野外地质工作的基础上,采用电子探针仪、X光粉晶衍射仪、红外光谱仪和拉曼光谱仪对周口店花岗闪长岩中自然产出的斜长石进行了谱学特征和化学成分分析。电子探针分析获得该地斜长石的化学成分,端元组分在Ab(85.21)Or(0.18)An(9.11)到Ab(90.060),Or(3.00),An(13.27)之间;斜长石的X光粉晶衍射特征说明样品组成为较为纯净的钠长石,根据粉晶衍射峰及其衍射强度计算得出了样品晶胞参数;采用红外光谱和拉曼光谱分析了斜长石的谱学特征并对特征吸收谱带和特征峰进行了归属。在OH一红外吸收区(3000~3800cm^-1)出现了由0H的伸缩振动导致的特征吸收谱带:3200,3310,3420和3615cm^-1,表明研究区的钠长石普遍含有结构水,以OH一的形式存在。在以上分析的基础上对此种长石的晶体化学和结构特征进行了归纳总结。
The chemical composition and spectra characteristic of feldspar from Zhoukoudian granodiorite were systematically analyzed.Based on the field work,some feldspar samples were selected for crystal chemistry and structure analysis through EMPA,IR,LRM and XRD.The compositions of the feldspar range between Ab(85.21)Or(0.18)An(9.11)and Ab(90.060),Or(3.00),An(13.27)by electronic microscope probe analysis.According to the XRD peak and its diffraction intensity,the mineral species was found and the unit cell parameters were calculated.The absorption bands and peaks of infrared and Raman spectra were also assigned and the results show that the characteristics of its infrared and Raman spectra are in accordance with the ideal atlas of albite.The infrared spectra show that all the analyzed feldspar grains contain structural hydrogen,which occur as OH.On the basis of the above analyses,the crystal chemistry and structure characteristics of feldspar were summarized.
作者
张永旺
曾溅辉
刘琰
郭建宇
ZHANG Yong-wang;ZENG Jian-hui;LIU Yan;GUO Jian-yu(State Key Laboratory for Petroleum Resource and Prospecting,Chinese University of Petroleum,Beijing 102249,China;Basin&:Reservoir Research Center,Chinese University of Petroleum,Beijing 102249,China;State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China;Petro China International Research Center,Research Institute of Petroleum Exploration and Development,Petro China,Beijing100083,China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2009年第9期2480-2484,共5页
Spectroscopy and Spectral Analysis
基金
中国博士后科学基金项目(20070420492)
国家自然科学基金项目(40472075)资助
