| 马尼拉俯冲带相变与地震成因机制研究 |
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| 引用本文： | 陈爱华,许鹤华.马尼拉俯冲带相变与地震成因机制研究[J].地质科学,2014,0(3):924-934. |
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| 作者姓名： | 陈爱华 许鹤华 |
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| 作者单位： | 1. 广州海洋地质调查局国土资源部海底矿产资源重点实验室 广州 510075;
2. 中国科学院南海海洋研究所中国科学院边缘海地质重点实验室 广州 510301 |
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| 基金项目： | 国家自然科学基金项目(编号:41376061,41302100)资助 |
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| 摘 要： | 根据马尼拉俯冲带的地球物理资料，选取3条典型剖面，模拟马尼拉俯冲板块的热结构，分析俯冲板块的相变过程，探讨马尼拉俯冲带的地震成因机制。结果表明：1）B-B’剖面约在95 km深度时，洋壳开始进入榴辉岩相，C-C’剖面洋壳在160 km进入榴辉岩相，2）马尼拉俯冲带中部的地震活动倾向发生在100 km以上，南部的地震活动分布深度更深，3）马尼拉俯冲带的俯冲板块发生撕裂，使断离以下俯冲板块不容易发生地震活动，影响深源地震的发生。
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| 关 键 词： | 地震 相变 马尼拉 撕裂 |
| 收稿时间： | 2014-01-12 |
| 修稿时间： | 2014-01-12; |
Phase transformation and study of earthquakes formation mechanism of Manila trench |
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| Chen Aihua,Xu Hehua.Phase transformation and study of earthquakes formation mechanism of Manila trench[J].Chinese Journal of Geology,2014,0(3):924-934. |
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| Authors: | Chen Aihua Xu Hehua |
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| Institution: | 1. Key Laboratory of Marine Mineral Resources, Ministry of Land and Resources, Guangzhou Marine Geology Survey, Guangzhou 510075;
2. Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301 |
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| Abstract: | According to geophysical data of Manila subduction zone, we select three typical cross-sections to simulate the thermal structure, analyze the phase transformation, and study the earthquakes formation mechanism. The results show that: 1)Oceanic crust of B-B' cross-section enter eclogite at about 95 km depth while C-C' cross-section at 160 km depth,2)Earthquake in the middle of Manila subduction zone is tend to occur above 100 km depth, but the south is more deeper,3)Manila subduction plate have been torn off, under where is not prone to cause seismic activity, which impact deep source earthquake. |
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| Keywords: | Earthquake Phase transformation Manila Tear |
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