| 塔里木盆地三叠纪前缘隆起迁移演化规律 |
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| 引用本文： | 唐武,王英民,张雷,吴嘉鹏,孙希家,郑贵春.塔里木盆地三叠纪前缘隆起迁移演化规律[J].古地理学报,2013,15(2):219-230. |
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| 作者姓名： | 唐武 王英民 张雷 吴嘉鹏 孙希家 郑贵春 |
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| 作者单位： | 1.中国石油大学(北京)油气资源与探测国家重点实验室，北京102249;2.中国石油大学(北京)地球科学学院，北京 102249;3.中石油煤层气有限责任公司，北京 100028;4.中海石油（中国）有限公司天津分公司，天津300452 |
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| 基金项目： | 国家重点基础研究发展计划项目(编号:2009CB219407);国家自然科学基金项目(编号:40972077)共同资助 |
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| 摘 要： | 利用大量钻测井及地震资料，通过对邻近前缘隆起的隆后坳陷地层特征的分析以及与库车河露头的对比，探讨了塔里木盆地三叠纪前缘隆起的迁移演化规律。结果表明，三叠纪前缘隆起发生了3次往复迁移，隆后坳陷地区发育多期不整合面，且最大不整合面均发育于地层的底部。早三叠世，隆后坳陷地层南厚北薄，早期前缘隆起向天山方向迁移，隆后坳陷地层超覆其上，前陆坳陷变窄；晚期则向克拉通方向迁移隆升，邻近的隆后坳陷地层遭受强烈剥蚀。由于前缘隆起的遮挡作用，该时期前陆坳陷与隆后地区尚未贯通，山前发育冲积扇。中、晚三叠世前缘隆起又发生两次迁移，其迁移特征与早三叠世类似，但中三叠世前陆坳陷与隆后坳陷仍未相连，而晚三叠世两者相互连通。
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| 关 键 词： | 前缘隆起 隆后坳陷 前陆盆地 塔里木盆地 三叠系 |
| 收稿时间： | 2012-06-08 |
Forebulge migration and evolution of the Triassic in Tarim Basin |
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| Tang Wu,Wang Yingmin,Zhang Lei,Wu Jiapeng,Sun Xijia,Zheng Guichun.Forebulge migration and evolution of the Triassic in Tarim Basin[J].Journal of Palaeogeography,2013,15(2):219-230. |
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| Authors: | Tang Wu Wang Yingmin Zhang Lei Wu Jiapeng Sun Xijia Zheng Guichun |
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| Institution: | 1.State Key Laboratory of Petroleum Resource and Prospecting，China University of Petroleum(Beijing)，Beijing 102249; 2.College of Geosciences，China University of Petroleum(Beijing)，Beijing 102249; 3.PetroChina Coalbed Methane Company Limited，Beijing 100028; 4.Tianjin Branch of CNOOC Limited，Tianjin300452 |
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| Abstract: | Based on a large amount of logging and seismic data，and a comparison with Kuqa River outcrop，the characteristics of back-bulge strata and unconformities of the Triassic which developed near forebulge area in Tarim Basin are comprehensively analyzed，and then the forebulge migration and evolution are discussed.The results show that during the Triassic the forebulge had experienced three times reciprocating migration，with Early，Middle and Late Triassic once respectively.Many unconformities were developed in the back-bulge area，with maximum unconformity located at the bottom. During the earlier Early Triassic, the forebulge which migrated toward Tianshan Mountain was onlapped by back-bulge strata，with the strata being thinner to the north and a narrower foredeep left. However，during the late Early Triassic，the forebulge moved and uplifted toward craton，with nearby back-bulge strata severely eroded.Simultaneously，because of the blocking of forebulge，the foredeep couldnt connect with back-bulge zone，and the alluvial fan developed under mountains.The characteristics of two later migrations were similar to that of the Early Triassic，but the back-bulge and forebulge were separated during the Middle Triassic and connected during the Late Triassic. |
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| Keywords: | forebulge back-bulge foreland basin Tarim Basin Triassic |
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