| 碳酸盐矿物阴极发光性的控制因素分析 |
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| 引用本文： | 孙靖,黄小平,金振奎,薛晶晶.碳酸盐矿物阴极发光性的控制因素分析[J].沉积与特提斯地质,2009,29(1):102-108. |
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| 作者姓名： | 孙靖 黄小平 金振奎 薛晶晶 |
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| 作者单位： | 1. 中国石油新疆油田分公司,勘探开发研究院,新疆,克拉玛依,834000
2. 中国石油大学,资源与信息学院,北京,102249 |
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| 基金项目： | 中国石油天然气集团公司石油科技中青年创新基金 |
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| 摘 要： | 碳酸盐矿物的阴极发光性主要受其Mn^2＋和Fe^2＋含量，以及Mn^2＋／Fe^2＋值的综合控制，但Mn^2＋／Fe^2＋值的控制作用强一些。研究中充填裂缝的方解石胶结物样品主要采自北京西山寒武系和奥陶系的碳酸盐岩地层中。此外，还从北京石花洞中采集了现代溶洞的石笋样品。样品的阴极发光强度可分为不发光、暗、中等和亮，阴极发光颜色也相应地分为不发光、橙红色、橙黄色和亮黄色。通过对野外露头样品进行电子探针研究，测定其中的Mn^2＋和F^2＋’的含量，并结合样品的阴极发光颜色和强度，得出Mn^2＋含量要在0．01％以上，Fe^2＋含量至少在0．8％以下，Mn^2＋／Fe^2＋在0．05以上，方解石胶结物才能发光。经研究发现，充填裂缝中方解石胶结物的阴极发光性与Mn^2＋和Fe^2＋含量，以及Mn^2＋／Fe^2＋值之间存在如下关系：不含Mn^2＋，Fe^2＋微量，Mn^2＋／Fe^2＋为0时，不发光；0．05〈Mn^2＋Fe^2＋〈0．2时，发光强度暗，发光颜色为橙红色；0．2〈Mn^2＋／Fe^2＋〈2时，发光强度中等，发光颜色为橙黄色；Mn^2＋／Fe^2＋〉2时，发光强度亮，发光颜色为亮黄色。
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| 关 键 词： | 碳酸盐矿物 阴极发光 Mn2+/Fe2+值 |
Controlling factors of cathodeluminescence of carbonate minerals |
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| SUN Jing,HUANG Xiao-ping,JIN Zhen-kui,XUE Jing-jing.Controlling factors of cathodeluminescence of carbonate minerals[J].Sedimentary Geology and Tethyan Geology,2009,29(1):102-108. |
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| Authors: | SUN Jing HUANG Xiao-ping JIN Zhen-kui XUE Jing-jing |
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| Institution: | SUN Jing, HUANG Xiao-ping , JIN Zhen-kui , XUE Jing-jing (1. Research Institute of Petroleum Exploration and Development, Xinjiang Oil Field Company, PetroChina, Karamay 834000, Xinjiang, China ; 2. College of Geo-resources and Information, China University of Petroleum, Beijing 102249, China) |
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| Abstract: | Cathodeluminescence of carbonate minerals tends to be constrained by the Mn^2＋ and Fe^2＋ contents and Mn^2＋/Fe^2＋ ratios. In this study, the calcite cement samples were mostly collected from the Cambrian and Ordovi- cian carbonate rock strata in the Western Hills, Beijing. The cathodeluminescence intensities of these samples can be divided into nonluminous, weak, moderate and bright types. Correspondingly, the cathodeluminescence colours include nonluminescence, salmon, orange and bright yellow colours. The correlation of the cathodeluminescence intensities and colours based on the microprobe analysis, and the Mn^2＋ and Fe^2＋ contents and Mn^2＋/Fe^2＋ ratios has led us to the following conclusions. The calcite cement exhibits no luminescence when there is no Mn2. or only a trace amount of Fe^2＋ in the samples, and the Mn^2＋/Fe^2＋ ratios is 0. The calcite cement exhibits a weak lumines- cence and salmon when the Mn^2＋/Fe^2＋ ratios range between 0. 05 and 0.2. The calcite cement exhibits a moderate luminescence and orange when the Mn^2＋/Fe^2＋ ratios range between 0.2 and 2. The calcite cement exhibits a bright luminescence and bright yellow when the Mn^2＋/Fe^2＋ ratios go up to more than 2. |
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| Keywords: | carbonate mineral cathodeluminescence Mn^2＋/Fe^2 ＋ ratio |
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