辽东地区前寒武纪变质岩中黄铁矿特征分析
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摘要
利用电镜能谱分析技术对董家沟组片麻岩和辽河群板岩、大理岩样品中10个黄铁矿主量元素进行分析,检测结果表明,以辽河群板岩样品为主的6个黄铁矿w(Fe)=56.30%～65.42%、w(S)=34.58%～43.70%,属于硫亏损性黄铁矿,形成于富铁贫硫环境;董家沟组片麻岩和辽河群大理岩的4个黄铁矿样品w(Fe)=40.61%～45.11%、w(S)=54.74%～59.39%,属于硫饱和性黄铁矿,形成于贫铁富硫环境。
In this study, major elements of 10 pyrite samples in metamorphic rocks of Archean Dongjiagou formation and Paleoproterozoic Liaohe Group have been analyzed by using the energy spectrum analysis technique of electron microscopy analysis. The results show that contents of chemical components of 10 pyrite samples are generally consistent with the chemical composition of standard pyrite. The main chemical compositions of 6 out of 10 pyrite samples mainly consist of 56.30%-65.42% of Fe and 34.58%-43.70% of S, belonging to the sulfur depleting pyrite which was formed in iron-rich but sulfur-poor environment; while the main chemical compositions of 4 out of 10 pyrite samples mainly consist of 40.61%-45.11% of Fe and 54.74%-59.39% of S, belonging to sulfur-saturated pyrite which was formed in iron-poor but sulfur-rich environment.
In this study, major elements of 10 pyrite samples in metamorphic rocks of Archean Dongjiagou formation and Paleoproterozoic Liaohe Group have been analyzed by using the energy spectrum analysis technique of electron microscopy analysis. The results show that contents of chemical components of 10 pyrite samples are generally consistent with the chemical composition of standard pyrite. The main chemical compositions of 6 out of 10 pyrite samples mainly consist of 56.30%-65.42% of Fe and 34.58%-43.70% of S, belonging to the sulfur depleting pyrite which was formed in iron-rich but sulfur-poor environment; while the main chemical compositions of 4 out of 10 pyrite samples mainly consist of 40.61%-45.11% of Fe and 54.74%-59.39% of S, belonging to sulfur-saturated pyrite which was formed in iron-poor but sulfur-rich environment.
引文
[1]李胜荣.结晶学与矿物学[M].北京:地质出版社,2008:264-268.
[2]GB/T 17359-1998,电子探针和扫描电镜X射线能谱定量分析通则[S].北京:中国标准出版社,1998.
[3]迟广成,殷晓,伍月,等.扫描电镜/能谱仪用于变质岩中榍石的鉴定[J].冶金分析,2016,36(4):11-16.
[4]GB/T 15074-2008,电子探针定量分析方法通则[S].北京:中国标准出版社,2008.
[5]《岩石矿物分析》编委会.岩石矿物分析[M].北京:地质出版社,2011:1200-1230.
[6]姚骏恩.电子显微镜的现状与展望[J].电子显微学报,1998,17(6):767-776.
[7]严春莲,鞠新华,任群,等.电子探针分析钢表面氧化铁皮的状态[J].冶金分析,2013,33(7):51-57.
[8]廖乾初.改善场发射扫描电镜分辨本领的原理和展望[J].电子显微学报,2000,19(5):709-716.
[9]周剑雄,陈振宇.扫描电镜图像放大倍率校准有证参考物质的研究[J].电子显微学报,2004,23(4):480-481.
[10]徐翠,李林庆,张洁,等.X射线荧光光谱-电子探针在中酸性火山岩鉴定中的应用[J].岩矿测试,2016,35(6):626-633
[11]GB/T 14505-2010,岩石和矿石化学分析方法总则及一般规定[S].北京:中国标准出版社,2010.
[12]Misumi I,Gonda S,Kurosawa T,et al.Submicrometer-pitch intercomparison between optical diffraction,scanning electron microscope and atomic force microscope[J].Meas Sci Technol,2003(14):2065-2074.
[13]林培英.晶体光学与造岩矿物[M].北京:地质出版社,2005:125-153.
[2]GB/T 17359-1998,电子探针和扫描电镜X射线能谱定量分析通则[S].北京:中国标准出版社,1998.
[3]迟广成,殷晓,伍月,等.扫描电镜/能谱仪用于变质岩中榍石的鉴定[J].冶金分析,2016,36(4):11-16.
[4]GB/T 15074-2008,电子探针定量分析方法通则[S].北京:中国标准出版社,2008.
[5]《岩石矿物分析》编委会.岩石矿物分析[M].北京:地质出版社,2011:1200-1230.
[6]姚骏恩.电子显微镜的现状与展望[J].电子显微学报,1998,17(6):767-776.
[7]严春莲,鞠新华,任群,等.电子探针分析钢表面氧化铁皮的状态[J].冶金分析,2013,33(7):51-57.
[8]廖乾初.改善场发射扫描电镜分辨本领的原理和展望[J].电子显微学报,2000,19(5):709-716.
[9]周剑雄,陈振宇.扫描电镜图像放大倍率校准有证参考物质的研究[J].电子显微学报,2004,23(4):480-481.
[10]徐翠,李林庆,张洁,等.X射线荧光光谱-电子探针在中酸性火山岩鉴定中的应用[J].岩矿测试,2016,35(6):626-633
[11]GB/T 14505-2010,岩石和矿石化学分析方法总则及一般规定[S].北京:中国标准出版社,2010.
[12]Misumi I,Gonda S,Kurosawa T,et al.Submicrometer-pitch intercomparison between optical diffraction,scanning electron microscope and atomic force microscope[J].Meas Sci Technol,2003(14):2065-2074.
[13]林培英.晶体光学与造岩矿物[M].北京:地质出版社,2005:125-153.