| 南海北部古俯冲带的位置及其对南海扩张的控制 |
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| 引用本文： | 闵慧,任建业,高金耀,左玉山.南海北部古俯冲带的位置及其对南海扩张的控制[J].大地构造与成矿学,2010,34(4). |
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| 作者姓名： | 闵慧 任建业 高金耀 左玉山 |
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| 作者单位： | 中国地质大学,构造与油气资源教育部重点实验室,湖北,武汉,430074;中国地质大学,构造与油气资源教育部重点实验室,湖北,武汉,430074;教育部,含油气盆地构造研究中心,湖北,武汉,430074;国家海洋局,第二海洋研究所,浙江,杭州,310012 |
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| 基金项目： | 国家自然科学基金，973项目 |
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| 摘 要： | 为了确定南海北部古俯冲带的具体位置,作者利用美国LCT综合反演软件对收集到的重磁数据进行处理解释,结果显示在南海北部从台湾西南部到一统暗沙隆起,即沿南海海盆北部陆坡为一条布格重力异常水平梯度峰值带,指示了古俯冲带的具体位置;其北部的高磁异常代表了与之对应的古火山弧。深反射地震资料也验证了南海北部陆坡位置存在古俯冲带,钻井资料显示俯冲带存在的时代为晚侏罗世到早白垩世。据此绘制了南海地区晚中生代到现今的构造古地理演化图,指出南海的扩张应与晚中生代俯冲带这个先存的软弱带有关,南海海盆正是从古俯冲带的位置开始扩张。
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| 关 键 词： | 南海 古俯冲带 地球物理 南海扩张 |
Location of the Ancient Subduction Zone in the Northern South China Sea and Its Constrains on the Spreading of the South China Sea Basin |
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| MIN Hui,REN Jianye,GAO Jinyao,ZUO Yushan.Location of the Ancient Subduction Zone in the Northern South China Sea and Its Constrains on the Spreading of the South China Sea Basin[J].Geotectonica et Metallogenia,2010,34(4). |
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| Authors: | MIN Hui REN Jianye GAO Jinyao ZUO Yushan |
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| Institution: | MIN Hui1,REN Jianye1,2,GAO Jinyao3 and ZUO Yushan1(1.MOE Key Laboratory of Tectonics and Petroleum Resources,China University of Geosciences,Wuhan 430074,Hubei,China,2.Structural Research Center of Oil & Gas Bearing Basin,Ministry of Education,3.Second Institute of Oceanography,SOA,Hangzhou 310012,Zhejiang,China) |
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| Abstract: | To determine the exact location of the Mesozoic subduction zone in the northern South China Sea,the LCT joint inversion software is used to process gravity and magnetic data.The results show that there is a high horizontal-gradient of Bouguer gravity anomaly zone from southwestern Taiwan to the east of Yitongansha uplift,which may indicate the location of the ancient subduction,and there is a high magnetic anomaly zone parallel the gravity anomaly suggesting a Mesozoic volcanic arc which corresponds to the ... |
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| Keywords: | South China Sea ancient subduction zone geophysical the spreading of the South China Sea basin |
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