| 神木煤田延安组1~(-1)、1~(-2)及2~(-2)煤层的煤岩学特征及煤相划分 |
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| 引用本文： | 康希栋,杨起,潘治贵.神木煤田延安组1~(-1)、1~(-2)及2~(-2)煤层的煤岩学特征及煤相划分[J].地球科学,1992(4). |
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| 作者姓名： | 康希栋 杨起 潘治贵 |
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| 作者单位： | 中国地质大学 北京
(康希栋，杨起)，中国地质大学 北京(潘治贵) |
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| 摘 要： | 根据鄂尔多斯盆地神木煤田延安组1~(-1)、1~(-2)及2~(-2)煤层的平均光泽和结构特征,划分出了12种宏观煤岩类型。显微研究表明,该区煤中均质镜质体的含量较高,且多为草本植物和灌木类所组成,因此认为根皮镜质体的大量存在是该区煤的主要煤岩特征之一。此外,一些过渡型显微组分,如半镜质体和半丝质体的含量也相对高。依据因子分析和聚类分析结果并结合凝胶化指数和结构保存指数,划分出4种沼泽相:开阔水域水生植物淤泥相、深覆水草甸沼泽相、浅覆水草本灌木混生沼泽相和陆地森林沼泽相。
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| 关 键 词： | 煤岩学特征 根皮镜质体 煤相 沼泽相 延安组 神木煤田 鄂尔多斯盆地 |
A STUDY ON COAL PETROLOGY AND FACIES OF COAL SEAM 1~(-1),1~(-2),AND 2~(-2),SHENMU COALFIELD,ORDOS BASIN |
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| Kang Xidong Yang Qi Pan Zhigui.A STUDY ON COAL PETROLOGY AND FACIES OF COAL SEAM 1~(-1),1~(-2),AND 2~(-2),SHENMU COALFIELD,ORDOS BASIN[J].Earth Science-Journal of China University of Geosciences,1992(4). |
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| Authors: | Kang Xidong Yang Qi Pan Zhigui |
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| Abstract: | Ordos Basin is famous for its large number of coal resources and the excellent coal quality. Shenmu coalfield is located in the northeast of the basin. Jurassic Yan' an Formation is the coal-bearing strata. Based on clusters and textures of these coal seams,twelve sub-lithotypes are distinguished. The microscopic studies show that collinite content is much higher and most of it came from herbosa and brush. Therefore rhizo-cortial vitrinite is abundant. Another characteristic of coal petrology is that transitional macerals, such as semivitrinite and semifusinite are relatively high. Based on the comprehensive study of coal petrology, four kinds of coal facies are recognized : open moor with hydrophytium ,deep water-covered moor with meadow,shallow water-covered moor with herbosa and brush,and terrestrial moor with forest. The genesis of macerals is also discussed in this paper. |
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| Keywords: | the characteristics of coal petrology rhizo-cortial vitrinite coal facies- morass fa-cies Yan' an Formation Shenmu coalfield Ordos Basin |
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