| 川南地区晚二叠世峨眉山玄武岩与含煤建造 |
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| 引用本文： | 陈忠恕,吴玉东. 川南地区晚二叠世峨眉山玄武岩与含煤建造[J]. 中国煤炭地质, 2010, 0(2): 14-18 |
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| 作者姓名： | 陈忠恕 吴玉东 |
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| 作者单位： | 四川省煤田地质局; |
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| 基金项目： | 本文乃一孔之见,不足之处难免,敬请批评指正.插图及文稿编排由曹颖、杨燕同志制作完成,课题其他同志给予了大力帮助,在此表示衷心感谢! |
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| 摘 要： | 川南地区晚二叠世峨眉山玄武岩韵律性旋回明显,局部夹煤层,是攀西裂谷中岩浆喷溢形成的岩体,研究认为本区玄武岩是C23-1以下含煤地层的"相变"。均衡作用和"坍塌"效应引发地壳下沉,与玄武岩岩体密切相关,从而控制了不同时期聚煤基底地形;本区晚二叠世属潮坪聚煤环境,是在总的海侵背景条件下,由海侵、基底升降和聚煤速率共同作用来造就聚煤可容空间,本区正向的同沉积构造,即基底上升,能协调三者造就有利的聚煤可容空间;"古蔺—温水正向同沉积构造","筠连蒿坝正向同沉积构造"为潮坪聚煤奠定了有利的地形条件,成为聚煤中心。该区上二叠统煤层主要属高阶煤,推测与幔源物质集聚活动有关,受深部高温幔源物质热能传导作用的影响,储蓄热能成为高温异常区,是高阶煤形成的主要原因。
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| 关 键 词： | 峨眉山玄武岩 含煤建造 均衡作用 同沉积构造 相变 聚煤带 变质 |
Late Permian Emeishan Basalt and Coal-bearing Formation in Southern Sichuan Area |
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| Chen Zhongshu,Wu Yudong. Late Permian Emeishan Basalt and Coal-bearing Formation in Southern Sichuan Area[J]. Coal Geology of China, 2010, 0(2): 14-18 |
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| Authors: | Chen Zhongshu Wu Yudong |
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| Affiliation: | Chen Zhongshu,Wu Yudong(Sichuan Bureau of Coal Geological Exploration,Chengdu,Sichuan 610072) |
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| Abstract: | The Late Permian Emeishan basalt rhythmic cycle features in southern Sichuan are obvious,locally intercalated with coal seams.The rock mass was formed by magmatic outpouring.The study reckoned that the basalt in the area is the facies change of coal-bearing strata under the C23-1.The isostatic compensation and collapse effect initiated the earth crust subsidence;it is closely related to basalt rock mass,thus controlled base topography during different periods.The Late Permian tidal flat coal accumulation en... |
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| Keywords: | Emeishan basalt coal-bearing formation isostatic action synsedimentary structure facies change coal-accumulative zone metamorphism |
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