| 笔石光学结构的反射率十字图解研究 |
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| 引用本文： | 刘大锰,王利忠,杜刚,胡宝林.笔石光学结构的反射率十字图解研究[J].现代地质,2001,15(3):321-325. |
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| 作者姓名： | 刘大锰 王利忠 杜刚 胡宝林 |
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| 作者单位： | 1. 中国地质大学能源系
2. 辽宁瓦房店市水文工程地质队 |
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| 基金项目： | 国家自然科学基金项目(49502034). |
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| 摘 要： | 应用反射率十字图解研究了中国部分地区下古生界地层中动物有机碎屑笔石的光学各向异性。研究结果表明 ,在成熟度较低时 ,笔石呈现双光轴中性特征 ,即Rmax-Rint≈Rint-Rmin;随成熟度的增加 ,笔石具有明显的双光轴负光性特征 ,即Rmax-Rint
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| 关 键 词： | 笔石 各向异性 反射率十字图解分析 下古生界 中国 |
| 文章编号： | 1000-8527(2001)03-0321-05 |
| 修稿时间： | 2001年2月27日 |
STUDY OF THE REFLECTANCE CROSS-PLOT OF OPTICAL STRUCTURE OF GRAPTOLITES IN CHINA |
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| LIU Da-meng ,WANG Li-zhong ,DU Gang ,HU Bao-lin.STUDY OF THE REFLECTANCE CROSS-PLOT OF OPTICAL STRUCTURE OF GRAPTOLITES IN CHINA[J].Geoscience——Journal of Graduate School,China University of Geosciences,2001,15(3):321-325. |
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| Authors: | LIU Da-meng WANG Li-zhong DU Gang HU Bao-lin |
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| Institution: | LIU Da-meng 1,WANG Li-zhong 2,DU Gang 1,HU Bao-lin 1 |
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| Abstract: | The optical anisotropy of zooclast graptolite in some Paleozoic strata of China has been studied using reflectance cross-plot analysis. The cross-plots indicate that low rank samples tend to be biaxial neutral (R max -R int ≈R int -R min ) and higher rank samples are obviously biaxial negative. In addition, it can be used to determine the value of the intermediate reflectance axis (R int ), the shape and variation in the graptolite reflectance indicating surface (GRIS) with maturity. From these cross-plots, GRIS shapes for this study are found to become oblate with rank. The reflectance cross-plot analysis is a useful tool for the study of the optical anisotropy of graptolite. |
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| Keywords: | graptolite optical anisotropy reflectance cross-plot Lower Paleozoic China |
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