| 南海北部渐新世末的构造事件 |
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| 引用本文： | 邵磊,庞雄,张功成,乔培军,李前裕,韦刚健,吴梦霜.南海北部渐新世末的构造事件[J].地球科学,2009,34(5):717-724. |
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| 作者姓名： | 邵磊 庞雄 张功成 乔培军 李前裕 韦刚健 吴梦霜 |
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| 作者单位： | 1.同济大学海洋地质国家重点实验室, 上海 200092 |
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| 基金项目： | 国家重点研究专项经费(No.2007CB819501);;国家科技重大专项(No.2008ZX05000-025);;创新研究群体基金(No.40621063) |
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| 摘 要： | ODP1148站以及珠江口盆地沉积物均记录了渐新世末发生的重大地质构造事件, 这一构造事件在时间上与南海扩张轴发生跳跃的时间十分吻合, 是渐新世以来南海构造演化史上最为重大的构造事件, 涉及到南海扩张、盆地类型转化、沉积物源变迁等一系列相关联的重大地质事件.伴随这一地质构造事件, 南海北部沉积物成分发生剧烈改变, 出现渐新世-中新世地球化学成分上的跳跃, 在深海沉积中发生沉积间断及滑塌事件, 并使珠江口盆地由断陷型盆地转为坳陷型盆地, 白云凹陷由渐新世晚期的浅水陆架环境转为中新世以后的深水陆坡环境.可以认为, 这次构造运动奠定了我国现代的地理格局, 也标志着我国东部陆相盆地最佳烃源岩形成期的结束, 在南海乃至东亚地区影响深远.
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| 关 键 词： | 南海 白云凹陷 渐新世 海底扩张 构造事件 |
| 收稿时间： | 2009-03-01 |
Late Oligocene Tectonic Event in the Northern South China Sea and Its Implications |
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| SHAO Lei,PANG Xiong,ZHANG Gong-cheng,QIAO Pei-jun,LI Qian-yu,WEI Gang-jian,WU Meng-shuang .State Key Laboratory of Marine Geology,Tongji University,Shanghai,China .CNOOC Ltd.,Shenzhen Branch,Guangzhou,China.Late Oligocene Tectonic Event in the Northern South China Sea and Its Implications[J].Earth Science-Journal of China University of Geosciences,2009,34(5):717-724. |
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| Authors: | SHAO Lei PANG Xiong ZHANG Gong-cheng QIAO Pei-jun LI Qian-yu WEI Gang-jian WU Meng-shuang State Key Laboratory of Marine Geology Tongji University Shanghai China CNOOC Ltd Shenzhen Branch Guangzhou China |
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| Institution: | SHAO Lei1,PANG Xiong2,ZHANG Gong-cheng3,QIAO Pei-jun1,LI Qian-yu1,WEI Gang-jian4,WU Meng-shuang2 1.State Key Laboratory of Marine Geology,Tongji University,Shanghai200092,China 2.CNOOC Ltd.,Shenzhen Branch,Guangzhou510240,China 3.Beijing Research Center of CNOOC Ltd.,Beijing100027,China 4.Guangzhou Institute of Geochemistry,CAS,Guangzhou510640,China |
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| Abstract: | A significant tectonic event was recorded in late Oligocene sediments from ODP Site 1148 and Pearl River Mouth Basin.This tectonic event coincided with the seafloor spreading axis jump event across the Oligocene/Miocene boundary,leading to a series of changes not only in seafloor spreading direction but also types of sedimentary basins and sediment provenances,and representing the greatest tectonic activity in the South China Sea region since the Oligocene.Sedimentation breaks and slumps as well as obvious ... |
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| Keywords: | South China Sea Baiyun Sag Oligocene seafloor spreading tectonic event |
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