| 临沂煤田晚古生代含煤岩系岩石组合及沉积环境 |
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| 引用本文： | 徐兴. 临沂煤田晚古生代含煤岩系岩石组合及沉积环境[J]. 山东科技大学学报(自然科学版), 1987, 0(2) |
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| 作者姓名： | 徐兴 |
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| 摘 要： | 临沂煤田晚古生代煤系最大厚度>400米,本溪组不含可采煤层,太原组及山西组为主要可采层段,尤以山西组可采性更普遍。本区煤系岩石组合为一广海型碳酸盐沉积为主的组合向近海型河流、三角洲环境碎屑沉积为为主的组合过渡为特征,砂泥岩组合多以陆源沉积为主,本溪组中并发现火山碎屑产物。本溪组以海洋环境为主的广海至局限台地碳酸盐岩与泻湖、海湾沙泥质沉积及流水成因的碎屑岩系交互。太原组为局限海碳酸盐沉积与流水成因的碎屑岩系及泻湖潮坪砂泥质组合频繁交互,普遍含可采煤层。山西组以大陆环境为主的河流、三角洲体系沉积产物,普遍含可采煤层。整个晚古生代煤系表现为一海退过程,煤层的形成与泻湖、潮坪及河流作用有关。
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| 关 键 词： | 海退 河流作用 三角洲 泻湖 潮坪 |
THE ROCK ASSOCIATION, THE COAL FORMATION AND THE ENVIRONMENTS OF LINYI COAIFIEID, LATE PALAEOZOIC ERA |
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| Xu Xing. THE ROCK ASSOCIATION, THE COAL FORMATION AND THE ENVIRONMENTS OF LINYI COAIFIEID, LATE PALAEOZOIC ERA[J]. Journal of Shandong Univ of Sci and Technol: Nat Sci, 1987, 0(2) |
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| Authors: | Xu Xing |
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| Abstract: | The largest thickness of Late Palaeozoic coal measures is over 400 meters at Linyi coal-field. Benxi group contains no minable seam. The principal minable seams are present in Taiyuan group and Shanxi group. The gradation from the rock association of primary carbonate deposits formed by the extensive sea to that of mainly paralie clastic deposits of delta and fluvial is the characteristic of the coal bearing strata of the area. The sand stone and mudstone association of Shanxi group is formed by near resource sedimentation. Volcaniclastic products found at Benxi group. During Whole Late Palaeozoic era it is shown regression process in environment. The origin of coal seams is related to fluviation and lagoon and tidal flat |
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| Keywords: | regression fluviation delta lagoon tidal flat |
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