| 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。 |
| 关键词: 名山 大邑砾岩 沉积相 孢粉组合 上新统 |
| DOI： |
| 附件 |
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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(项目编号:1212010610212) |
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| Sedimentary characteristics and stratigraphic ages of the Dayi conglomerates in Mingshan,Sichuan |
| MO Xiong, ZHAO Bing |
| (Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, Sichuan, China) |
| 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. |
| Key words: Mingshan Dayi conglomerate sedimentary facies sporopollen association Pliocene |
