| 闽西南龙永煤田童子岩组沉积地层精细特征与沉积环境演化分析 |
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| 引用本文： | 许福美,吴传始,郭玉森,吴志杰.闽西南龙永煤田童子岩组沉积地层精细特征与沉积环境演化分析[J].地质科学,2011,46(2):570-584. |
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| 作者姓名： | 许福美 吴传始 郭玉森 吴志杰 |
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| 作者单位： | （龙岩学院资源工程系福建龙岩 364012） |
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| 摘 要： | 运用沉积学、古生物地层学、层序地层学、岩石粒度分析等方法,从岩性特征、沉积构造、沉积体系等方面对研究区童子岩组地层的沉积特征进行了详细的研究,对其沉积环境演化特征进行分析.结果表明:研究区的童子岩组地层主要由较细粒的陆源碎屑物质组成,在整个童子岩组第一段发育过程中,障壁岛及其背后的整个环境组合随着区域海平面的升降而前后...
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| 关 键 词： | 龙永煤田 童子岩组 岩矿特征 地球化学特征 沉积特征 |
| 收稿时间： | 2010-09-10 |
Sedimentary characteristics and sepositional environment analysis of the Tongziyan Formation in Longyong coalfield,southwestern Fujian Province |
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| Xu Fumei,Wu Chuanshi,Guo Yusen,Wu Zhijie.Sedimentary characteristics and sepositional environment analysis of the Tongziyan Formation in Longyong coalfield,southwestern Fujian Province[J].Chinese Journal of Geology,2011,46(2):570-584. |
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| Authors: | Xu Fumei Wu Chuanshi Guo Yusen Wu Zhijie |
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| Institution: | (Department of Engineering|Longyan College|Longyan|Fujian 364012) |
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| Abstract: | By using sedimentology，paleontology and sequence stratigraphy，rock particle size analysis and other methods，the detailed sedimentary characteristics of Tongziyan Formation in Longyong coalfield has been studied in the aspectes of lithology，sedimentary structures，depositional system.The results showed that the Tongziyan Formation is mainly composed of fine grained lithic quartz sandstones and quartz sandstones with different types of beddings，such as the small plate and trough cross beddings，ripple waves and cross beddings，hummocky cross beddings，climbing ripple beddings，graded beddings，horizontal beddings，veins，wavy and lenticular beddings，etc.There are abundant marine fossils in this formation，including brachiopods，bivalves，cephalopods and dragonflies，together with some terrestrial plant fossils of ferns and seed ferns.According to sequence stratigraphic analysis，the Tongziyan formation in this district can be divided into three sedimentary cycles， 11 genetic stratigraphic units(phase sequence).Generally，Tongziyan Formation is formed in the littoral depositional environments of barrier island lagoon and tidal flat tidal channel lake shore which can be further divided into a number of different sedimentary facies according to its sedimentary assemblages.The evolution of the sedimentary environments of Tongziyan Formation can be divided into three phases：early，middle and late periods. |
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| Keywords: | Longyong coalfield Tongziyan Formation Sedimentary characteristics Depositional environment Facies |
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