用多种数据及粒子群算法反演河西地区主要断层运动
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摘要
利用河西地区2001—2004年的GPS数据和水准数据及2003—2004年的重力数据,结合带惯性权重的粒子群算法与位错理论模型,给出3种数据的附有相对权比的联合反演断层滑动速率的模型。对该地区的主要断层三维滑动速率进行的联合反演计算结果表明:河西地区的主要断层均以逆冲为主,具有挤压趋势,其中阿尔金断裂、祁连山断裂、皇城-塔尔庄断裂以及龙首山断裂北部活动较强烈,且这些活动断层与地震孕育和发生可能相关。
By using the particle swarm optimization algorithm combined with the dislocation model,the model for jointly inversing three-dimensional slip velocity of fault has been constructed.The three-dimensional slip velocity of the main faults in Hexi area was inversed from GPS data in 2001-2004,leveling data in 2001-2004 and gravity data in 2003-2004.The results show that the main faults in Hexi are thrust faults,and all of then have compressional trend.The activities of Altyn Tagh fault,Qilian Mountain fault,Huangcheng-Ta'erzhuang fault and the north part of Longshou Mountain are strong.There the occurrence of earthquake may be related with those fault.
By using the particle swarm optimization algorithm combined with the dislocation model,the model for jointly inversing three-dimensional slip velocity of fault has been constructed.The three-dimensional slip velocity of the main faults in Hexi area was inversed from GPS data in 2001-2004,leveling data in 2001-2004 and gravity data in 2003-2004.The results show that the main faults in Hexi are thrust faults,and all of then have compressional trend.The activities of Altyn Tagh fault,Qilian Mountain fault,Huangcheng-Ta'erzhuang fault and the north part of Longshou Mountain are strong.There the occurrence of earthquake may be related with those fault.
引文
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15丁国瑜,等.中国岩石圈动力学概论[M].北京:地震出版社,1991,106-114.(Ding Guoyu,et al.Introduction tolithospheric dynamics of China[M].Beijing:1991,106-114)
2张希,等.青藏块体东北缘GPS与水准资料的三维负位错联合反演[J].国际地震动态,2007,7:61-66.(ZhangXi,et al.United inversion of three-dimensional negativedislocation by GPS and leveling observation in northeasternmargins of Qinghai-Tibet block[J].Recent Developments inWord Seismology,2007,7:61-66)
3丁国瑜,等.活断层的分段——原则、方法及运用[M].北京:地震出版社,1993.(Ding Guoyu,et al.Segmentation ofactive faults:principles,methods and applications[M].Bei-jing:Seismological Press,1993)
4李爽,等.论多种数据联合反演的模式及算法[J].大地测量与地球动力学,2002,(3):78-82.(Li Shuang,et al.Models and algorithms of joint inversion with verious kinds ofdata[J].Journal of Geodesy and Geodynamics,2002,(3):78-82)
5 Okada Y.Surface deformation due to shear and tensile faultsin a half-space[J].BSSA,1985,82:1 018-1 040.
6 Okada Y.Internal deformation due to shear and tensile faultsin a half-space[J].BSSA,1992,82:1 018-1 040.
7陈运泰,等.用大地测量资料反演1976年唐山地震的位错模式[J].地球物理学报,1979,22(3):201-216.(Chen Yuntai,et al.Using geodetic data to inverse disloca-tion model of1976 Tangshan earthquake[J].Chinese Journalof Geophysis,1979,22(3):201-216)
8 Okubo S.Potential and gravity changes raised by point dislo-cations[J].Geophys.J.Int.1991,105:573-586.
9 Okubo S.Gravity and potential changes due to shear andtensile faults in a half-space[J].J.Geophys.Res.,1992,97:7 137-7 144.
10杨维,等.粒子群优化算法综述[J].中国工程科学,2004,6(5):87-94.(Yang Wei,et al.Survey of particleswarm optimization algorithm[J].Engineering Science,2004,6(5):87-94)
11 Eberhart R C and Shi Y.Particle swarm optimization:devel-opments,applications and resources[A].Proceedings ofthe IEEE Congress on Evolutionary Computation[C].Pisca-taway,NJ:IEEE Service Center.2001.81-86.
12 Parsopoulos K E,et al.Improving particle swarm optimizerby function“stretching”[A].Hadjisawas N and PardalosP.Advances in convex analysis and global optimization[C].The Netherlands:Kluwer Academic Publishers,2001.445-457.
13独知行,等.联合反演模型中相对权比的优化反演[J].测绘学报,2003,32(1):15-19.(Du zhixing,et al.Opti-mising inversion of relative power in joint inversion model[J].Acta Geodaetica et Cartographica Sinica,2003,32(1):15-19)
14国家地震局地质研究所,国家地震局兰州地震研究所.祁连山-河西走廊活动断裂系[M].北京:地震出版社,1993,157-159.(Institute of Geology of State SeismologialBureau and Lanzhou Institute of Seismology of State Seis-mologial Bureau.Active fault system?of Qilian-Hexi[M].Beijing:Seismologial press,1993,157-159)
15丁国瑜,等.中国岩石圈动力学概论[M].北京:地震出版社,1991,106-114.(Ding Guoyu,et al.Introduction tolithospheric dynamics of China[M].Beijing:1991,106-114)
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