川滇地区近期地壳运动的应变积累
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摘要
利用1994～2006年川滇地区GPS和区域水准观测资料,借助弹性块体边界负位错模型,结合近年来跨断层形变总体特征,研究了川滇地区构造块体及其边界断裂的应变积累状况与强度。分析结果表明:目前川滇地区总体呈现能量积累为主的构造应力态势;安宁河断裂及其与则木河断裂、鲜水河断裂交汇区,盐源-丽江地块及其边缘附近反映出相对高的应变能积累背景及可能的中-短期地震前兆特征。
By use of the regional leveling and GPS observations in Sichuan-Yunnan area during 1994-2006,aided by the negative dislocation model for the elastic block boundaries,combining with the total characteristics of deformation cross-fault,the recent status and intensity of strain accumulation of tectonic blocks and their boundary faults in Sichuan-Yunnan area are studied.The results show that recent status of tectonic stress in Sichuan-Yunnan area manifes itself in energy accumulation mainly.The strain energy accumulation appears obviously in the Anninghe fault and the regions where it meets Zemuhe fault and Xianshuihe fault,the Yanyuan-Lijiang block and its margins,it may be the medium and short-term precursors of some coming earthquakes.
By use of the regional leveling and GPS observations in Sichuan-Yunnan area during 1994-2006,aided by the negative dislocation model for the elastic block boundaries,combining with the total characteristics of deformation cross-fault,the recent status and intensity of strain accumulation of tectonic blocks and their boundary faults in Sichuan-Yunnan area are studied.The results show that recent status of tectonic stress in Sichuan-Yunnan area manifes itself in energy accumulation mainly.The strain energy accumulation appears obviously in the Anninghe fault and the regions where it meets Zemuhe fault and Xianshuihe fault,the Yanyuan-Lijiang block and its margins,it may be the medium and short-term precursors of some coming earthquakes.
引文
[1]张希,江在森,王双绪,等.地壳运动的非震负位错模型反演与强震地点预测研究[R].中国地震局地震科学联合基金课题报告(603001),2005.
1中国地震局监测预报司编.2004年印度尼西亚苏门答腊8.7级大地震及其对中国大陆地区的影响[M].北京:地震出版社,2005.1Department of Monitoring and Prediction of China Earth-quake Administration(edit).TheMs8.7huge earthquake in Sumatra of Indonesia in2004and its influence on Chinese Mainland[M].Beijing:Seismology Press,2005.(in Chi-nese)
2中国地震局地震预测研究所.中国大陆强震趋势预测研究(2006年度)[M].北京:地震出版社,2005.2Institute of Earthquake Prediction,China Earthquake Admin-istration.Research on trend of strong earthquakes in China Mainland[M].Beijing:Seismology Press,2005.(in Chi-nese)
3Matsu’ura M,Jackson D D and Cheng A.Dislocation model for aseismic crustal deformation at Hollister,California[J].J.of Geophysical Research,1986,91(B12):12661-12674.
4Okada Y.Surface deformation due to shear and tensile faults in a half-space[J].Bulletin of the Seismological Society of America,1985,75(4):1135-1154.
5高锡铭,伍吉仓.负位错模型与断层运动图像——确定滇西地震预报实验区的潜在震源区[J].地壳形变与地震,1994,14(4):1～8.5Gao Ximing and Wu Jicang.Negative dislocation model and fault movement pattern:determination of potential region in the study area of earthquake prediction,west Yunnan[J].Crustal Deformation and Earthquakes,1994,14(4):1-8.(in Chinese)
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7何玉梅,姚振兴.中国台湾南部及其周边岛屿现今地壳形变的位错模型[J].地球物理学报,2002,45(5):638～645.7He Yumei and Yao Zhenxing.Dislocation model for current crustal deformation in and around southern Taiwan,China[J].Chinese Journal of Geophysics.2002,45(5):638-645.(in Chinese)
8张希,江在森,王琪,等.1999～2001年青藏块体东北缘地壳水平运动的非震反位错模型及变形分析[J].地震学报,2003,25(4):374～381.8Zhang Xi,Jiang Zaisen,Wang Qi,et al.Aseismic negative dislocation model and deformation analysis of crustal horizon-tal movement during1999-2001in the northeast margin of Qinghai-Tibet block[J].Acta Seismologica Sinica,2003,16(4):395-403.
9张希,江在森,王琪,等.川滇地区地壳水平运动特征与强震关系研究[J].大地测量与地球动力学,2003,23(3):35～41.9Zhang Xi,Jiang Zaisen,Wang Qi,et al.Recent crustal hor-izontal motion features of Sichuan-Yunnan and their rela-tionship to strong earthquakes[J].Journal of Geodesy and Geodynamics,2003,23(3):35-41.(in Chinese)
10吴云,申重阳,乔学军,等.现今地壳运动与地震前兆研究[J].大地测量与地球动力学,2002,22(1):22～28.10Wu Yun,Chen Chongyang,Qiao Xuejun,et al.Resear-ches on current crust movements and earthquake precursors[J].Journal of Geodesy and Geodynamics,2002,22(1):22-28.(in Chinese)
11张希,张四新,王双绪,等.北祁连-河西地区强震地点预测[J].大地测量与地球动力学,2005,25(1):40～46.11Zhang Xi,Zhang Sixin,Wang Shuangxu,et al.Prediction for strong earthquake location in the area of northern Qilian and Hexi[J].Journal of Geodesy and Geodynamics,2005,25(1):40-46.(in Chinese)
12张希,江在森,王琪,等.青藏块体东北缘弹性块体边界负位错反演与强震地点预测[J].地震学报,2005,27(6):620～629.12Zhang Xi,Jiang Zaisen,Wang Qi,et al.Inversion for nega-tive dislocation on elastic block boundaries in the northeast margin of Qinghang-Tibet block and prediction for strong earthquake location[J].Acta Seismologica Sinica,2005,18(6):666-677.
13张希,江在森,王双绪,等.川滇地区地壳水平运动的弹性块体边界负位错模型与强震地点预测[J].地震研究,2005,28(2):119～124.13Zhang Xi,Jiang Zaisen,Wang Shuangxu,et al.Negative dis-location model for elastic block boundary of horizontal crus-tal movement and prediction for strong earthquake position in Sichuan-Yunnan area[J].J.of Seismological Research,2005,28(2):119-124.(in Chinese)
14Okada Y.Internal deformation due to shear and tensile faults in a half-space[J].Bulletin of the Seismological So-ciety of America,1992,82(2):1018-1040.
15张四新,江在森,王双绪.南北地震带及青藏块体东部垂直形变与地震活动研究[J].西北地震学报,2003,25(2):143～148.15Zhang Sixin,Jiang Zaisen and Wang Shuangxu.Study on vertical deformation and seismicity in Chinese north-south seismic belt and eastern Qinghai-Tibet block[J].North-western Seismological Journal,2003,25(2):143-148.(in Chinese)
16张四新,张晓亮,程宏宾.滇西地区现今垂直形变演化特征[J].地震研究,2005,28(3):268～273.16Zhang Sixin,Zhang Xiaoliang and Cheng Hongbin.Current features of vertical crust deformation in west Yunnan[J].J.of Seismological Research,2005,28(3):268-273.(in Chinese)
17张希,江在森,王双绪,等.断层形变的应变强度比动态图像与震例综合研究[J].地壳形变与地震,2001,21(2):37～42.17Zhang Xi,Jiang Zaisen,Wang Shuangxu,et al.Comprehen-sive study on dynamic patterns of strain strength ratio of fault deformation and seismic examples[J].Crustal De-formation and Earthquake,2001,21(2):37-42.(in Chinese)
1中国地震局监测预报司编.2004年印度尼西亚苏门答腊8.7级大地震及其对中国大陆地区的影响[M].北京:地震出版社,2005.1Department of Monitoring and Prediction of China Earth-quake Administration(edit).TheMs8.7huge earthquake in Sumatra of Indonesia in2004and its influence on Chinese Mainland[M].Beijing:Seismology Press,2005.(in Chi-nese)
2中国地震局地震预测研究所.中国大陆强震趋势预测研究(2006年度)[M].北京:地震出版社,2005.2Institute of Earthquake Prediction,China Earthquake Admin-istration.Research on trend of strong earthquakes in China Mainland[M].Beijing:Seismology Press,2005.(in Chi-nese)
3Matsu’ura M,Jackson D D and Cheng A.Dislocation model for aseismic crustal deformation at Hollister,California[J].J.of Geophysical Research,1986,91(B12):12661-12674.
4Okada Y.Surface deformation due to shear and tensile faults in a half-space[J].Bulletin of the Seismological Society of America,1985,75(4):1135-1154.
5高锡铭,伍吉仓.负位错模型与断层运动图像——确定滇西地震预报实验区的潜在震源区[J].地壳形变与地震,1994,14(4):1～8.5Gao Ximing and Wu Jicang.Negative dislocation model and fault movement pattern:determination of potential region in the study area of earthquake prediction,west Yunnan[J].Crustal Deformation and Earthquakes,1994,14(4):1-8.(in Chinese)
6伍吉仓,陈永奇.一种板块边界断层运动的力学模型[J].地壳形变与地震,2000,20(2):8～14.6Wu Jicang and Chen Yongqi.A mechanical model for fault movement of plate boundary[J].Crustal Deformation and Earthquake,2000,20(2):8-14.(in Chinese)
7何玉梅,姚振兴.中国台湾南部及其周边岛屿现今地壳形变的位错模型[J].地球物理学报,2002,45(5):638～645.7He Yumei and Yao Zhenxing.Dislocation model for current crustal deformation in and around southern Taiwan,China[J].Chinese Journal of Geophysics.2002,45(5):638-645.(in Chinese)
8张希,江在森,王琪,等.1999～2001年青藏块体东北缘地壳水平运动的非震反位错模型及变形分析[J].地震学报,2003,25(4):374～381.8Zhang Xi,Jiang Zaisen,Wang Qi,et al.Aseismic negative dislocation model and deformation analysis of crustal horizon-tal movement during1999-2001in the northeast margin of Qinghai-Tibet block[J].Acta Seismologica Sinica,2003,16(4):395-403.
9张希,江在森,王琪,等.川滇地区地壳水平运动特征与强震关系研究[J].大地测量与地球动力学,2003,23(3):35～41.9Zhang Xi,Jiang Zaisen,Wang Qi,et al.Recent crustal hor-izontal motion features of Sichuan-Yunnan and their rela-tionship to strong earthquakes[J].Journal of Geodesy and Geodynamics,2003,23(3):35-41.(in Chinese)
10吴云,申重阳,乔学军,等.现今地壳运动与地震前兆研究[J].大地测量与地球动力学,2002,22(1):22～28.10Wu Yun,Chen Chongyang,Qiao Xuejun,et al.Resear-ches on current crust movements and earthquake precursors[J].Journal of Geodesy and Geodynamics,2002,22(1):22-28.(in Chinese)
11张希,张四新,王双绪,等.北祁连-河西地区强震地点预测[J].大地测量与地球动力学,2005,25(1):40～46.11Zhang Xi,Zhang Sixin,Wang Shuangxu,et al.Prediction for strong earthquake location in the area of northern Qilian and Hexi[J].Journal of Geodesy and Geodynamics,2005,25(1):40-46.(in Chinese)
12张希,江在森,王琪,等.青藏块体东北缘弹性块体边界负位错反演与强震地点预测[J].地震学报,2005,27(6):620～629.12Zhang Xi,Jiang Zaisen,Wang Qi,et al.Inversion for nega-tive dislocation on elastic block boundaries in the northeast margin of Qinghang-Tibet block and prediction for strong earthquake location[J].Acta Seismologica Sinica,2005,18(6):666-677.
13张希,江在森,王双绪,等.川滇地区地壳水平运动的弹性块体边界负位错模型与强震地点预测[J].地震研究,2005,28(2):119～124.13Zhang Xi,Jiang Zaisen,Wang Shuangxu,et al.Negative dis-location model for elastic block boundary of horizontal crus-tal movement and prediction for strong earthquake position in Sichuan-Yunnan area[J].J.of Seismological Research,2005,28(2):119-124.(in Chinese)
14Okada Y.Internal deformation due to shear and tensile faults in a half-space[J].Bulletin of the Seismological So-ciety of America,1992,82(2):1018-1040.
15张四新,江在森,王双绪.南北地震带及青藏块体东部垂直形变与地震活动研究[J].西北地震学报,2003,25(2):143～148.15Zhang Sixin,Jiang Zaisen and Wang Shuangxu.Study on vertical deformation and seismicity in Chinese north-south seismic belt and eastern Qinghai-Tibet block[J].North-western Seismological Journal,2003,25(2):143-148.(in Chinese)
16张四新,张晓亮,程宏宾.滇西地区现今垂直形变演化特征[J].地震研究,2005,28(3):268～273.16Zhang Sixin,Zhang Xiaoliang and Cheng Hongbin.Current features of vertical crust deformation in west Yunnan[J].J.of Seismological Research,2005,28(3):268-273.(in Chinese)
17张希,江在森,王双绪,等.断层形变的应变强度比动态图像与震例综合研究[J].地壳形变与地震,2001,21(2):37～42.17Zhang Xi,Jiang Zaisen,Wang Shuangxu,et al.Comprehen-sive study on dynamic patterns of strain strength ratio of fault deformation and seismic examples[J].Crustal De-formation and Earthquake,2001,21(2):37-42.(in Chinese)
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