| 四川盆地西部海相碎屑岩-陆相碎屑岩的转换过程 |
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| 引用本文： | 陈杨,赵霞飞,刘树根,刘春富.四川盆地西部海相碎屑岩-陆相碎屑岩的转换过程[J].成都理工大学学报(自然科学版),2009,36(6). |
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| 作者姓名： | 陈杨 赵霞飞 刘树根 刘春富 |
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| 作者单位： | "油气藏地质及开发工程"国家重点实验室(成都理工大学),成都,610059 |
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| 基金项目： | 中国石化集团公司海相前瞻性项目 |
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| 摘 要： | 四川盆地是一个叠合盆地,经历了海相碳酸盐岩到海相碎屑岩、海相碎屑岩到陆相碎屑岩的转换和变迁.这两个转换过程最终结束均发生在四川盆地西部.海相碎屑岩到陆相碎屑岩的转换发生在晚三叠世末,相对应的地层单位为上三叠统须家河组.通过对须家河组厚度和沉积相变化,以及龙门山前砾岩的分布特征研究,认为这一转换主要发生于须家河组沉积末期(T_3x~4-T_3x~6),时间上随地区不同而不同,空间上具有由北往南的先后顺序.这揭示龙门山造山带的造山隆升过程具有由北往南的特点.这一转换过程导致川西前陆盆地内南、北段油气地质条件存在差异.寻找河口沙坝、三角洲平原河道砂等形成的优质储层应是须家河组油气勘探的关键.
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| 关 键 词： | 四川盆地 海相 陆相 碎屑岩 沉积相 须家河组 龙门山 |
Transition from marine clastic rocks to nonmarine clastic rocks in the west of Sichuan Basin,China |
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| CHEN Yang,ZHAO Xia-fei,LIU Shu-gen,LIU Chun-fu.Transition from marine clastic rocks to nonmarine clastic rocks in the west of Sichuan Basin,China[J].Journal of Chengdu University of Technology: Sci & Technol Ed,2009,36(6). |
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| Authors: | CHEN Yang ZHAO Xia-fei LIU Shu-gen LIU Chun-fu |
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| Institution: | CHEN Yang,ZHAO Xia-fei,LIU Shu-gen,LIU Chun-fu State Key Laboratory of Oil , Gas Reservoir Geology , Exploitation,Chengdu University of Technology,Chengdu 610059,China |
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| Abstract: | Sichuan Basin is a superimposed basin experiencing two transformation processes(i.e.from marine carbonates to marine clastics and from marine clastics to terrigenous clastics).The end of the two processes finally took place in the west of Sichuan Basin.The former transition process(from marine carbonates to marine clastics) happened in Late Triassic Carnian and is easier to be recognized compared with the latter one as the differences between carbonates and clastic rocks are definite.The latter process happ... |
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| Keywords: | Sichuan Basin marine nonmarine clastic rock sedimentary facies Xujiahe Formation Mt Longmenshan |
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