| 四川名山建山大邑砾岩沉积特征及地层时代 |
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| 引用本文： | 莫雄,赵兵.四川名山建山大邑砾岩沉积特征及地层时代[J].沉积与特提斯地质,2010,30(4):72-78. |
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| 作者姓名： | 莫雄 赵兵 |
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| 作者单位： | 成都理工大学沉积地质研究院,四川成都610059 |
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| 基金项目： | 四川名山等四幅1:5万区域地质调查项目 |
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| 摘 要： | 详细描述了四川名山建山大邑砾岩实测剖面,讨论了大邑砾岩的岩性组合特征及沉积环境。认为大邑砾岩主要为一套位于风化壳之上的河流-冲积扇沉积,自下而上由细变粗,属于物源区总体不断上升过程中的近源沉积。通过大邑砾岩中的孢粉组合,讨论了其地质时代。该剖面孢粉组合以水龙骨科孢子为主,年代地层归属于新近系上新统。
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| 关 键 词： | 名山 大邑砾岩 沉积相 孢粉组合 上新统 |
Sedimentary characteristics and stratigraphic ages of the Dayi conglomerates in Mingshan,Sichuan |
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| MO Xiong,ZHAO Bing.Sedimentary characteristics and stratigraphic ages of the Dayi conglomerates in Mingshan,Sichuan[J].Sedimentary Geology and Tethyan Geology,2010,30(4):72-78. |
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| Authors: | MO Xiong ZHAO Bing |
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| Institution: | (Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,Sichuan,China) |
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| Abstract: | The present paper deals,in detail,with the measured section,lithologic associations and sedimentary environments of the Dayi conglomerates in Mingshan,Sichuan.The Dayi conglomerates are interpreted as a succession of proximal fluvial-alluvial deposits above the weathering crust,and display a coarsening-upward sequence.The predominant sporopollen associations Polypodiaceae in the stratigraphic section indicates that chronostratigraphically,the Dayi conglomerates should belong to the Pliocene. |
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| Keywords: | Mingshan Dayi conglomerate sedimentary facies sporopollen association Pliocene |
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