| 辉长岩摩擦实验中断层泥的剪切组构及成因 |
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| 引用本文： | 王泽利,何昌荣,陶青峰.辉长岩摩擦实验中断层泥的剪切组构及成因[J].地震地质,2004,26(3):461-471. |
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| 作者姓名： | 王泽利 何昌荣 陶青峰 |
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| 作者单位： | 中国地震局地质研究所,地震动力学国家重点实验室,北京,100029;长春工程学院国土资源系,长春,130021;中国地震局地质研究所,地震动力学国家重点实验室,北京,100029 |
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| 基金项目： | 国家自然科学基金 (4 0 2 74 0 2 4 )，国家重点基础研究发展规划项目 (G1 9980 4 0 70 4 )共同资助 |
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| 摘 要： | 模拟断层泥的摩擦实验对地震的成核及断层带变形组构的研究具有重要意义。文中对辉长岩摩擦实验中的断层泥变形组构及形成机理进行了研究 ,以期从实验室角度来理解地壳深部断层活动的性质和特点。断层泥剪切组构中的边界剪切带 ,R1,Y剪切面比较发育 ,T裂隙次之 ;R2 ,P ,X剪切面不发育。R1面与边界面的夹角较小 ,平均在 1 1°左右 ,为单剪变形过程中达到破裂极限状态时形成的 1组库仑破裂面。分析表明R1面密度随正应力的增加而明显增高。而在相同的正应力下 ,随温度的增高 ,R1面的密度也有增加的趋势。当温度高于 5 0 0℃时 ,断层带内的斜长石出现塑性变形特征 ,R1剪切面与矿物的压性面理组成典型的S -C组构
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| 关 键 词： | 断层摩擦实验 Riedel剪切 S-C组构 |
| 文章编号： | 0253-4967(2004)03-0461-11 |
| 修稿时间： | 2004年4月27日 |
SHEAR STRUCTURE OF GABBRO GOUGE IN FRICTIONAL EXPERIMENTS AND ITS ORIGIN |
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| WANG Ze li , HE Chang rong TAO Qing feng State Key Laboratory of Earthquake Dynamics.SHEAR STRUCTURE OF GABBRO GOUGE IN FRICTIONAL EXPERIMENTS AND ITS ORIGIN[J].Seismology and Geology,2004,26(3):461-471. |
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| Authors: | WANG Ze li HE Chang rong TAO Qing feng State Key Laboratory of Earthquake Dynamics |
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| Affiliation: | WANG Ze li 1,2) HE Chang rong 1) TAO Qing feng 1) 1)State Key Laboratory of Earthquake Dynamics,Institute of Geology,China Earthquake Administration,Beijing 100029,China 2)Department of Land & Resources,Changchun Institute of Technology,Changchun 130021,China |
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| Abstract: | Experiment on frictional sliding of simulated fault gouge is of great significance to the understanding of earthquake nucleation and natural shear zone structures. The present paper deals with deformational structure of simulated gabbro fault gouge and its origin, for the purpose of understanding fault activity in deep crust. The experiment also shows that various shear structures are well developed in the simulated fault gouge. Among them, the boundary shear, R 1 shear, Y shear and T gash are relatively |
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| Keywords: | frictional experiment Riedel shear S C fabric |
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