| 阿尔金南、北缘断裂带部分地段的几何学特征、断层泥SEM特征及其意义 |
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| 引用本文： | 罗治江.阿尔金南、北缘断裂带部分地段的几何学特征、断层泥SEM特征及其意义[J].西北地震学报,1988,10(4):51-61. |
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| 作者姓名： | 罗治江 |
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| 作者单位： | 四川省地震局 |
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| 摘 要： | 本文初步研究了阿尔金南、北缘断裂带部分地段的几何学特征,结果显示这两条断裂带的主体部分表现出以左旋走滑为主的活动特征,而其东西两端分别存在有由走滑向逆冲转变的转换段。带内断层分布不连续,存在有多组阶距,许多阶区内发育有拉分盆地和推挤型构造。地震多发生于大尺度阶区及其附近。北缘断裂的西段断层形成较早,东段断层形成相对较晚,断层不连续段之间存在强烈的相互趋近作用,易发生失稳而导致地震发生。断层泥石英颗粒的SEM研究表明,在南缘断裂的苏尔巴斯陶—库什哈段,全新世时期有过强烈活动,距今数百年至1000年内曾发生过一次震级约为7.0—7.5级的地震。作者还总结了几种可能代表古地震事件存在的显微动力学特征。
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THE GEOMETRIC CHARACTERISTICS FOR THE SEGMENTS OF SOUTH AND NORTH FRINGE OF AERJIN FAULT ZONES, SEM FEATURES OF THE FAULT GOUGES AND ITS SIGNIFICANCE |
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| Luo Zhijiang.THE GEOMETRIC CHARACTERISTICS FOR THE SEGMENTS OF SOUTH AND NORTH FRINGE OF AERJIN FAULT ZONES, SEM FEATURES OF THE FAULT GOUGES AND ITS SIGNIFICANCE[J].Northwestern Seismological Journal,1988,10(4):51-61. |
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| Authors: | Luo Zhijiang |
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| Institution: | Seismological Bureau of Sichuan Province |
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| Abstract: | In this paper, the fault geometric characteristics on various scales are preliminarily studied for the segments of Aerjin south and north fringe fault zones, and the relationship between the geometric characteristics and the seismic activity of the fault zones is quatitatively discussed. Moreover, using the SEM research method for quartz grains from fault gouges, the Holocene activity of some segments of the fault zones is discussed in combination with the macroscopic investigation data, and several microscopic dynamic structures that presumably represent the existence of paleoearthquake events are identified. |
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