| 惠州抽水蓄能电站厂址区F304断裂特征及活动性 |
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| 引用本文： | 马浩明.惠州抽水蓄能电站厂址区F304断裂特征及活动性[J].华南地震,2009,29(4):28-35. |
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| 作者姓名： | 马浩明 |
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| 作者单位： | 广东省地震局,广东,广州,510070 |
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| 摘 要： | F304断裂是广东惠州抽水蓄能电站厂址区所遇规模最大的断裂．通过遥感卫星图像解译、地表地质调查、硐探测量、地球化学探测和钻孔探测等多种技术方法获得的资料．对该断裂的空间展布与基本特征、活动性等问题进行了综合分析研究，研究结果表明：F304断裂是形成于早白垩世的NEE—NE走向断裂，倾向SE，倾角650～800，宽30余米：断裂由上、下构造破碎带与中部碎裂岩带三部分组成；断裂性质为早期左旋压扭，后期拉张：断裂早期挤压活动与硅化程度均西强东弱，受区域环形旋扭构造影响．断裂东段出现后期拉裂．并出现强渗漏水现象，而断裂西段则因早期强烈硅化而紧密胶结，无后期活动迹象。地震活动资料显示断裂近场范围地震活动水平低．F304断裂不具现今活动性．
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| 关 键 词： | 断层活动性 断裂构造特征 断裂三维结构模型 |
Characteristic and Activity of Fault 304 in Huizhou Pumped Storage Power Station Site Area |
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| MA Haoming.Characteristic and Activity of Fault 304 in Huizhou Pumped Storage Power Station Site Area[J].South China Journal of Seismology,2009,29(4):28-35. |
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| Authors: | MA Haoming |
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| Institution: | MA Haoming (Earthquake Administration of Guangdong Province, Guangzhou 510070, China) |
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| Abstract: | F304 is the largest fault in scale in the site area of Huizhou pumped storage power station. Based on the information obtained by the methods of satellite remote sensing image interpretation, geological investigation, tunnel measurement, geochemical exploration and borehole detection, a comprehensive analysis and study on the basic characteristic and activity of F304 were made in this paper. The result shows that F304 was formed in the age of early Cretaceous with the trend of NEE-NE and the dip of 65°-80°; the fault was composed of the upper and lower tectonic crushed zones and the middle cataclastite zone with the width of about 30 meters; the property of the fracture is compressive-torsional with levorotation in nonage and tensional in anaphase. The degrees of compressive activities and silicifiCation show the characteristic of fierceness in the west and feebleness in the east. Owing to the influence of the annular rotationtorsion structure in the region, the east part of F304 exhibits tension crack and strongly percolating of water, whereas the west part of F304 has no active evidence for the reason that the fracture is tight-conglutinated in the early intensive silicification. The material of seismic activity also shows that the level of seismic activity around the engineering site is low, and the F304 has no recent activity. |
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| Keywords: | Fault activity Fault characteristics Three dimensional structure model |
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