基于PS-InSAR技术的丽江断裂形变监测研究
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摘要
基于PS-InSAR技术,利用欧空局28景ENVISAT ASAR数据,运用小基线集干涉处理方法,提取并分析了丽江断裂2003~2010年的平均形变速率。研究结果显示:(1)丽江断裂具左旋走滑形变特征;(2)年平均LOS向形变速率在3~5 mm/a之间,与地质资料较吻合。该研究为丽江地区地震预测提供一种可靠的断裂带活动数据,但丽江断裂进入城区后受城市化活动影响,断裂形变与地面沉降信息共存,较难分离。
Based on the PS-InSAR technology,using ENVISAT ASAR data of ESA(European Space Agency),we extracted and analyzed the average deformation rate of the Lijiang Fault from 2003 to 2010 by small baseline set interference processing method.The research results demonstrated that:(1) The deformation characteristic of Lijiang Fault showed the sinistral strike-slip;(2) The annual deformation rate in LOS direction was between 3mm/a and 5 mm/a,and consistented with geological data.This research could provide the credible fault zone activity date for the earthquake forecast of the Lijiang region.However,because of the section of Lijiang Fault into the city was affected by urbanization,and fault deformation and ground subsidence information of the Lijiang Fault were coexisted,it was difficult to separate.
Based on the PS-InSAR technology,using ENVISAT ASAR data of ESA(European Space Agency),we extracted and analyzed the average deformation rate of the Lijiang Fault from 2003 to 2010 by small baseline set interference processing method.The research results demonstrated that:(1) The deformation characteristic of Lijiang Fault showed the sinistral strike-slip;(2) The annual deformation rate in LOS direction was between 3mm/a and 5 mm/a,and consistented with geological data.This research could provide the credible fault zone activity date for the earthquake forecast of the Lijiang region.However,because of the section of Lijiang Fault into the city was affected by urbanization,and fault deformation and ground subsidence information of the Lijiang Fault were coexisted,it was difficult to separate.
引文
陈国浒,刘云华,单新建.2010.PS-InSAR技术在北京采空塌陷区地表形变测量中的应用探析[J].中国地质灾害与防治学报,21(2):59-63.
郭炳跃,何敏,刘建东.2011.利用PS-InSAR技术监测南通市区地面沉降[J].地质灾害与环境保护,22(4):103-107.
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苏生瑞,王运生,王士天.2004.丽江地震区应力场研究[J].地质论评,50(1):57-63.
王永安,刘强,王世芹.2004.丽江7.0级地震前跨断层形变累积率的变化特征[J].地震研究,27(1):61-65.
向宏发,徐锡伟,虢顺民,等.2002.丽江—小金河断裂第四纪以来的左旋逆推运动及其构造地质意义[J].地震地质,24(2):188-198.
许才军,何平,温扬茂.2011.利用PS-InSAR研究意大利Etna火山的地表形变[J].武汉大学学报:信息科学版,36(9):1 012-1 016.
张景发,龚利霞,姜文亮.2006.PS-InSAR技术在地壳长期缓慢形变监测中的应用[J].国际地震动态,(6):1-6.
周光全,张建国,周瑞琦,等.1997.丽江7.0级地震的地震地质构造背景分析[J].地震研究,20(1),92-100.
Ferretti A,Claudio P,Rocca A.2000.Nonlinera subsidence rate estimation using permanent scatter in differential SAR interferometry[J].IEEE Transaction on Geoscience and Remote Sensing,38(5):2 202-2 212.
Ferretti A,Claudio P,Rocca A.2001.Permanent scatters in SAR interferometry[J].IEEE Transactions on Geoscience and Remote Sensing,39(1):8-20.
Hooper A J.2006.Persistent scatterer radar interferometry for crustal deformation studies and modeling of volcanic deformation[D].Stanford,California:Stanford University.
Hooper A.2008.A multi-temporal InSAR method incorporating both persistent scatterer and small baseline approaches.Geophys Res Lett,35(16),302,doi:10.1029/2008GL03465.
郭炳跃,何敏,刘建东.2011.利用PS-InSAR技术监测南通市区地面沉降[J].地质灾害与环境保护,22(4):103-107.
韩竹军,向宏发,虢顺民,等.2004.滇西北丽江盆地北部区第四纪时期的左旋剪切拉张[J].科学通报,50(4):356-362.
洪顺英.2010.基于多视线向DInSAR技术的三维同震形变场解算方法研究及应用[D].北京:中国地震局地质研究所.
李忠华,苏有锦,刘祖荫.1998.丽江7.0级地震滇西实验场区跨断层短基线短水准测量的变化特征[J].中国地震,14(2):140-149.
牛安福,张晶,薛艳.2004.丽江地震后形变场变化与中强地震之间的关系的研究[J].地震,24(增刊):61-68.
屈春燕,单新建,宋小刚,等.2011.基于PS-InSAR技术的海原断裂带地壳形变初步研究[J].地球物理学报,54(4):984-993.
苏生瑞,王运生,王士天.2004.丽江地震区应力场研究[J].地质论评,50(1):57-63.
王永安,刘强,王世芹.2004.丽江7.0级地震前跨断层形变累积率的变化特征[J].地震研究,27(1):61-65.
向宏发,徐锡伟,虢顺民,等.2002.丽江—小金河断裂第四纪以来的左旋逆推运动及其构造地质意义[J].地震地质,24(2):188-198.
许才军,何平,温扬茂.2011.利用PS-InSAR研究意大利Etna火山的地表形变[J].武汉大学学报:信息科学版,36(9):1 012-1 016.
张景发,龚利霞,姜文亮.2006.PS-InSAR技术在地壳长期缓慢形变监测中的应用[J].国际地震动态,(6):1-6.
周光全,张建国,周瑞琦,等.1997.丽江7.0级地震的地震地质构造背景分析[J].地震研究,20(1),92-100.
Ferretti A,Claudio P,Rocca A.2000.Nonlinera subsidence rate estimation using permanent scatter in differential SAR interferometry[J].IEEE Transaction on Geoscience and Remote Sensing,38(5):2 202-2 212.
Ferretti A,Claudio P,Rocca A.2001.Permanent scatters in SAR interferometry[J].IEEE Transactions on Geoscience and Remote Sensing,39(1):8-20.
Hooper A J.2006.Persistent scatterer radar interferometry for crustal deformation studies and modeling of volcanic deformation[D].Stanford,California:Stanford University.
Hooper A.2008.A multi-temporal InSAR method incorporating both persistent scatterer and small baseline approaches.Geophys Res Lett,35(16),302,doi:10.1029/2008GL03465.
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