| 龙门山岩石圈地壳三维结构及汶川大地震成因浅析 |
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| 引用本文： | 蔡学林,曹家敏,朱介寿,程先琼.龙门山岩石圈地壳三维结构及汶川大地震成因浅析[J].成都理工大学学报(自然科学版),2008,35(4). |
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| 作者姓名： | 蔡学林 曹家敏 朱介寿 程先琼 |
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| 作者单位： | 成都理工大学地球科学学院,成都,610059;成都理工大学信息工程学院,成都,610059 |
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| 基金项目： | 国家自然科学基金
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国家自然科学基金
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国土资源部专项基金
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成都理工大学校科研和教改项目 |
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| 摘 要： | 地质构造研究和地震测深剖面的构造解析显示,龙门山碰撞遣山带岩石圈存在既有显著差异又有密切联系的两套断裂系统:一是以地壳表层脆性剪切带为主的浅层断裂系统;另一是以切割莫霍界面或壳幔过渡带的壳幔韧性剪切带为主的深部断裂系统.根据地质构造和地震测深成果的综合研究,在建立起龙门山遣山带及邻区岩石圈地壳结构模型的基础上,论述了两套断裂系统的特征与相互关系,提出岩石圈壳幔韧性剪切带可能是四川汶川8.0级强烈地震的发震构造之一,以及强烈地震形成的动力学模式等.
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| 关 键 词： | 地壳 岩石圈 三维结构 壳幔韧性剪切带 发震构造 地震测深 构造解析 汶川大地震 龙门山 |
A preliminary study on the 3-D crust structure for the Longmen lithosphere and the genesis of the huge Wenchuan earthquake,Sichuan,China |
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| CAI Xue-lin,CAO Jia-min,ZHU Jie-shou,CHENG Xian-qiong.A preliminary study on the 3-D crust structure for the Longmen lithosphere and the genesis of the huge Wenchuan earthquake,Sichuan,China[J].Journal of Chengdu University of Technology: Sci & Technol Ed,2008,35(4). |
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| Authors: | CAI Xue-lin CAO Jia-min ZHU Jie-shou CHENG Xian-qiong |
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| Institution: | CAI Xue-lin1,CAO Jia-min2,ZHU Jie-shou2,CHENG Xian-qiong21.College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China,2.College of Information Engineering |
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| Abstract: | Based on a structural analysis of many seismic sounding profiles,there are two fault systems in Longmen collisional orogenic belt,Sichuan,China.They are both different obviously and correlative closely.One is shallow fault system composed mainly of brittle shear zones in surface crust,and the other is deep fault system composed mainly of crust-mantle ductile shear zones cutting Moho discontinuity.Based on the result of researching geological structure and seismic sounding profiles,the authors give a lithosp... |
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| Keywords: | crust lithosphere 3-D structure crust-mantle ductile shear zone seismic sounding structural analysis Wenchuan major earthquake Longmen Mountains |
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