地球物理方法探测活动断层效果和方法最佳组合分析
|
摘要
采用综合地球物理方法对长春市的已知断层进行探测实践,表明不同的地球物理方法解决不同问题,并具有不同的效果。例如重磁方法、联合剖面方法可以缩小活动断层的研究范围;探地雷达、浅层地震、高密度电法等方法在研究活动断层的剖面形态中具有很好的作用,而且探地雷达、高分辨率地震能够提供断层的时间等信息,为活动性探测提供依据。针对研究实例分析了综合地球物理方法在活动断层中的组合方法,为开展活动断层的研究提供借鉴。
The active fault detection is very important in the megapolis.Two active faults are detected in Changchun city by geophysical methods,the result shows that different method has different function and solves different problems,such as the gravity and magnetic method,combining section can be used to reduce the study area;GPR,shallow seismic,resistivity image profile etc.can be used in study the section shape of fault,and high resolution GPR and shallow seismic can provide the information of faulting time which is very important in activity study of active fault.The combining method of geophysical methods are also discussed in active fault study according to cases study,which can be used for reference in active fault detection in China.
The active fault detection is very important in the megapolis.Two active faults are detected in Changchun city by geophysical methods,the result shows that different method has different function and solves different problems,such as the gravity and magnetic method,combining section can be used to reduce the study area;GPR,shallow seismic,resistivity image profile etc.can be used in study the section shape of fault,and high resolution GPR and shallow seismic can provide the information of faulting time which is very important in activity study of active fault.The combining method of geophysical methods are also discussed in active fault study according to cases study,which can be used for reference in active fault detection in China.
引文
[1]丁国瑜,田勤俭,孔凡臣,等.活断层分段-原则、方法及应用[M].北京:地震出版社,1993.
[2]吴建平.城市地震活断层探测的地球物理方法[J].国际地震动态,2001,(8):
[3]A bbott R E,et a l.D epth to bedrock us ing grav im etryin the R eno and C arson c ity,N evada,area bas ins[J].G eophys ics,2000,65(2):340-350.
[4]B enson A K.A pp lication of GPR in assess ing sourcegeo log ica l hazards:exam p le of grounder w atercon tam ination fau lts,cav ities[J].J.A pp l.G eophys.1995,33:177-193.
[5]Chow J,A nge lier J,Hua J J,et a l.,Pa leose ism iceven t and active fau lting:from ground penetratingradar and h igh-reso lu tion se ism ic reflectionprofileacross the Ch ihshang F au lt,eastern T a iw an[J].T e-ctonophys ics,2001,333:241-259.
[6]Eberhart P D,M ichae l A J T hree-d im ens iona lve loc ity structure,se ism ic ity,and fau lt structure inthe Park fie ld reg ion,cen tra l C a liforn ia[J].J.G eophys.R es.1993,98:1737-1758.
[7]Suzuk iK,T oda S,K usunok iK,et a l.C ase stud ies ofe lectrica l and e lectrom agnetic m ethods app lied tom app ing active fau lts beneath the th ick Q uaternary[J].Eng ineering G eo logy,2000,56:29-45.
[8]U nsw orth M,et a l.H igh-reso lu tion e lectrom agneticim ag ing of the San A ndreas fau lt in cen tra l C a liforn ia[J].J.G eophys.R es,1999,104:1131-1150.
[2]吴建平.城市地震活断层探测的地球物理方法[J].国际地震动态,2001,(8):
[3]A bbott R E,et a l.D epth to bedrock us ing grav im etryin the R eno and C arson c ity,N evada,area bas ins[J].G eophys ics,2000,65(2):340-350.
[4]B enson A K.A pp lication of GPR in assess ing sourcegeo log ica l hazards:exam p le of grounder w atercon tam ination fau lts,cav ities[J].J.A pp l.G eophys.1995,33:177-193.
[5]Chow J,A nge lier J,Hua J J,et a l.,Pa leose ism iceven t and active fau lting:from ground penetratingradar and h igh-reso lu tion se ism ic reflectionprofileacross the Ch ihshang F au lt,eastern T a iw an[J].T e-ctonophys ics,2001,333:241-259.
[6]Eberhart P D,M ichae l A J T hree-d im ens iona lve loc ity structure,se ism ic ity,and fau lt structure inthe Park fie ld reg ion,cen tra l C a liforn ia[J].J.G eophys.R es.1993,98:1737-1758.
[7]Suzuk iK,T oda S,K usunok iK,et a l.C ase stud ies ofe lectrica l and e lectrom agnetic m ethods app lied tom app ing active fau lts beneath the th ick Q uaternary[J].Eng ineering G eo logy,2000,56:29-45.
[8]U nsw orth M,et a l.H igh-reso lu tion e lectrom agneticim ag ing of the San A ndreas fau lt in cen tra l C a liforn ia[J].J.G eophys.R es,1999,104:1131-1150.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心