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.
引文
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