滇西南龙陵—澜沧断裂带现今地壳垂直运动研究
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摘要
通过分析云南西南部1988、1991和2012年3期精密水准观测数据,获取了区域现今地壳垂直运动速度场。结果表明:龙陵—澜沧断裂带上的永德—永康段相对于周围区域的运动处于快速隆起状态,结合地震分布和构造地质等方面资料,认为该地区为一个中强震长期危险区域。
Analyzing the precise leveling observation data in 1988,1991 and 2012,we obtained the present crustal vertical movement in the southeast of Yunnan Province.The result shows that the vertical movement velocity field of Yongde-Yongkang segment in the middle of Longling-Lancang Fault uplifts quickly compared to its surrounding area.Combing the distribution of earthquakes and the geological structure etc.,this region is regarded as a middle and long term strong earthquake risk area.
Analyzing the precise leveling observation data in 1988,1991 and 2012,we obtained the present crustal vertical movement in the southeast of Yunnan Province.The result shows that the vertical movement velocity field of Yongde-Yongkang segment in the middle of Longling-Lancang Fault uplifts quickly compared to its surrounding area.Combing the distribution of earthquakes and the geological structure etc.,this region is regarded as a middle and long term strong earthquake risk area.
引文
攻守文.1995.陕甘宁青地区块体交接带上大地垂直形变演化特征与块体运动[J].地球物理学报,38(3):329-338.
虢顺民,向宏发,徐锡伟,等.1999.滇西南龙陵—澜沧断裂带:大陆地壳上一条新生的破裂带[J].科学通报,44(19):2118-2121.
虢顺民,徐锡伟,向宏发,等.2002.龙陵-澜沧新生断裂带地震破裂分段与地震预测研究[J].地震地质,24(2):133-144.
郝明.2012.基于精密水准数据的青藏高原东缘地区现今地壳垂直运动与典型地震同震及震后垂直形变研究[D].北京:中国地震局地质研究所.
姜葵.1993.1988年云南澜沧—耿马地震[M].昆明:云南大学出版社.
王凯,高莉萍,姚振兴,等.1991.澜沧—耿马地震的震源机制研究[J].地震学报,34(5):569-580.
王敏.2009.基于GPS同震位移场约束反演2008年5.12汶川大地震破裂空间分布[J].地球物理学报,52(10):2519-2526.
王绍晋,于利民.1991.利用P、S振幅比资料测定澜沧—耿马震区中小地震震源机制[J].地震研究,14(3):197-202.
向宏发,虢顺民,徐锡伟,等.2000.川滇南部地区活动地块划分与现今运动特征初析[J].地震地质,22(3):253-264.
向宏发,徐锡伟,虢顺民,等.1999.滇西地区两组交叉型活动断裂及其地震地质意义.活动断裂研究[M].北京:地震出版社,81-87.
张四新,刘文义,攻守文.1998.四川西部现今地壳形变与地震[J].地壳形变与地震,18(4):48-54.
张之立,王华强.1992.澜沧、耿马地震序列的非均匀断裂模式及弹塑性断裂计算方法[J].地震学报,14(4):463-471.
Hao M,Shen Z K,Wang Q L,et al.2012.Postseismic deformation mechanisms of the 1990 M W6.4 Gonghe,China earthquake constrained using leveling measurements[J].Tectonophysics,532-535:205-214.
Okada Y.1992.Internal deformation due to shear and tensile faults in a half-space[J].Bulletin of the Seismological Society of America 82(2),1 018-1 040.
Shen Z-K,LüJ,Wang M,et al.2005.Contemporary crustal deformation around the southeast borderland of the Tibetan Plateau[J].Journal of Geophysical Research,110(11):B11409.
Wang R,Lorenzo-Martin F,Roth F.2006.PSGRN/PSCMP—a new code for calculating co-and post-seismic deformation,geoid and gravity changes based on the viscoelastic-gravitational dislocation theory[J].Computers&Geosciences 32(4):527-541.
①http://igppweb.ucsd.edu/~gabi/crust2.html.
虢顺民,向宏发,徐锡伟,等.1999.滇西南龙陵—澜沧断裂带:大陆地壳上一条新生的破裂带[J].科学通报,44(19):2118-2121.
虢顺民,徐锡伟,向宏发,等.2002.龙陵-澜沧新生断裂带地震破裂分段与地震预测研究[J].地震地质,24(2):133-144.
郝明.2012.基于精密水准数据的青藏高原东缘地区现今地壳垂直运动与典型地震同震及震后垂直形变研究[D].北京:中国地震局地质研究所.
姜葵.1993.1988年云南澜沧—耿马地震[M].昆明:云南大学出版社.
王凯,高莉萍,姚振兴,等.1991.澜沧—耿马地震的震源机制研究[J].地震学报,34(5):569-580.
王敏.2009.基于GPS同震位移场约束反演2008年5.12汶川大地震破裂空间分布[J].地球物理学报,52(10):2519-2526.
王绍晋,于利民.1991.利用P、S振幅比资料测定澜沧—耿马震区中小地震震源机制[J].地震研究,14(3):197-202.
向宏发,虢顺民,徐锡伟,等.2000.川滇南部地区活动地块划分与现今运动特征初析[J].地震地质,22(3):253-264.
向宏发,徐锡伟,虢顺民,等.1999.滇西地区两组交叉型活动断裂及其地震地质意义.活动断裂研究[M].北京:地震出版社,81-87.
张四新,刘文义,攻守文.1998.四川西部现今地壳形变与地震[J].地壳形变与地震,18(4):48-54.
张之立,王华强.1992.澜沧、耿马地震序列的非均匀断裂模式及弹塑性断裂计算方法[J].地震学报,14(4):463-471.
Hao M,Shen Z K,Wang Q L,et al.2012.Postseismic deformation mechanisms of the 1990 M W6.4 Gonghe,China earthquake constrained using leveling measurements[J].Tectonophysics,532-535:205-214.
Okada Y.1992.Internal deformation due to shear and tensile faults in a half-space[J].Bulletin of the Seismological Society of America 82(2),1 018-1 040.
Shen Z-K,LüJ,Wang M,et al.2005.Contemporary crustal deformation around the southeast borderland of the Tibetan Plateau[J].Journal of Geophysical Research,110(11):B11409.
Wang R,Lorenzo-Martin F,Roth F.2006.PSGRN/PSCMP—a new code for calculating co-and post-seismic deformation,geoid and gravity changes based on the viscoelastic-gravitational dislocation theory[J].Computers&Geosciences 32(4):527-541.
①http://igppweb.ucsd.edu/~gabi/crust2.html.
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