| 马尔康巴拉水电站近场区主要断裂活动性及对工程的影响 |
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| 引用本文： | 孙东,王道永,吴德超,赵德军,黄晨.马尔康巴拉水电站近场区主要断裂活动性及对工程的影响[J].工程地质学报(英文版),2010,18(6):940-949. |
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| 作者姓名： | 孙东 王道永 吴德超 赵德军 黄晨 |
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| 作者单位： | 1.成都理工大学沉积地质研究院 成都 610059; |
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| 摘 要： | 马尔康巴拉电站近场区内断层的活动性对工程的设计和坝址的选择极为重要。根据野外调查、ESR测年、断层泥石英形貌、地震活动性等综合分析,认为近场区除松岗断裂以外的其他断层在地表浅部晚更新世以来不具活动性,对工程建设基本不产生影响。松岗断裂中段深部小震频繁,地表未见活动证据,南段错断Ⅱ级阶地,因此中南段属于晚更新世活动断层,北段晚更新世以来不具活动性;日部断裂与松岗断裂中段一样属于深部黏滑浅部闭锁型断层,这种断层可能会在未来地震中产生较大的地表变形,工程建设应避开此类断裂。活动的松岗断裂中南段的潜在地震危险性评估表明,其可能诱发的地震震级约Ms=6.95。拟选的上坝址由于距松岗断裂的安全距离不够,岩石物理条件较差,下坝址的利用落差较小等综合因素考虑,建议选择中坝址更为合理。
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| 关 键 词： | 断裂活动性 石英形貌扫描 ESR测年 地震危险性评估 巴拉水电站 |
| 收稿时间： | 2009-12-13 |
ACTIVITY AND EFFECT OF MAIN FAULTS IN NEAR FIELD OF BALA HYDROPOWER STATION IN MAERKANG |
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| SUN Dong WANG Daoyong WU Dechao ZHAO Dejun HUANG Chen.ACTIVITY AND EFFECT OF MAIN FAULTS IN NEAR FIELD OF BALA HYDROPOWER STATION IN MAERKANG[J].Journal of Engineering Geology,2010,18(6):940-949. |
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| Authors: | SUN Dong WANG Daoyong WU Dechao ZHAO Dejun HUANG Chen |
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| Institution: | 1.Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059;2.College of Earth Science； Chengdu University of Technology, Chengdu 610059 |
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| Abstract: | The activity of a main fault in the near field of Bala hydropower station in Maerkang is very important to engineering design and dam site selection.With the integrative analysis of investigation,ESR dating,quartz shape scanning in the fault gouge and seismic activity,we find that all faults in the near field region of Bala power station except Songgang fault has no perceptible activities in the earth surface since the Late Pleistocene.So they have no side influence to the engineering construction.In the mi... |
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| Keywords: | Active fault Quartz shape scanning ESR dating Seismic risk evaluation Bala hydropower station |
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