汾渭断裂带近10年GPS观测获得的剖面变形与应变积累分析
|
摘要
利用1999～2009年汾渭断裂带GPS速度场观测资料,研究了跨断裂剖面变形动态演化特性、应变积累的分段差异性以及汶川大地震等的可能影响。结果表明:近10年来山西断陷带南段、渭河盆地中东部应变积累相对较快,山西断陷带北端的蔚广盆地南缘断裂、渭河断裂西段也存在一定程度应变积累。汶川大地震影响相对明显,2007～2009年应变积累明显增强的有渭河断裂西段、山西断陷带南段和蔚广盆地南缘断裂。
Using velocity-field data observed by GPS from 1999 to 2009 in the Fen-Wei Fracture Belt,we study the features of the dynamic evolution of the cross-fracture section deformation,the difference of strain accumulation between fracture segments,and the possible influence of the MS8.0 Wenchuan Earthquake on the Belt.The result shows that in recent 10 years,the southern segment of the Shanxi Fracture and the middle-eastern Weihe Basin displayed relatively faster strain-accumulation,the southern margin fault of the Weiguang Basin and the western segment of the Weihe fracture also existed strain accumulation to some extent.All these variation obviously resulted from the Wenchuan Earthquake.From 2007 to 2009,the strain accumulation increased in the western segment of the Weihe Fracture,the southern segment of the Shanxi Fracture and the southern fault in the margin of the Weiguang Basin.
Using velocity-field data observed by GPS from 1999 to 2009 in the Fen-Wei Fracture Belt,we study the features of the dynamic evolution of the cross-fracture section deformation,the difference of strain accumulation between fracture segments,and the possible influence of the MS8.0 Wenchuan Earthquake on the Belt.The result shows that in recent 10 years,the southern segment of the Shanxi Fracture and the middle-eastern Weihe Basin displayed relatively faster strain-accumulation,the southern margin fault of the Weiguang Basin and the western segment of the Weihe fracture also existed strain accumulation to some extent.All these variation obviously resulted from the Wenchuan Earthquake.From 2007 to 2009,the strain accumulation increased in the western segment of the Weihe Fracture,the southern segment of the Shanxi Fracture and the southern fault in the margin of the Weiguang Basin.
引文
[1]中国地震局第二监测中心.2010.中国地震局第二监测中心2011年度地震趋势研究报告.
马宗晋.1982.地震与断裂关系的讨论,中国活动断裂[M].北京:地震出版社.
苏怡之,王进英.1991.汾渭地震带的地震活动性[J].内陆地震,6(2):143-150.
万永革,沈正康,盛书中,等.2009.2008年汶川大地震对周围断层的影响[J].地震学报,31(2):128-139.
张培震,闻学泽,徐锡伟,等.2009.2008年汶川8.0级特大地震孕育和发生的多单元组合模式[J].科学通报,54(7):944-953.
张世民.2000.汾渭地堑系盆地发育进程的差异及其控震作用[J].地质力学学报,6(2):30-37.
张希,崔笃信,蒋锋云.2009a.基于GPS观测的汶川地震参数反演与库仑应力变化分析[J].地震研究,32(4):351-356.
张希,崔笃信,张四新,等.2009b.地形变观测揭示的汶川MS8.0级地震同震响应与影响[J].武汉大学学报:信息科学版,34(10):1204-1209.
张希,王庆良,唐红涛,等.2011.汶川地震孕震背景与同震变化的铲形断层位错模拟[J].地球学报,32(2):189-194.
张希,王双绪,张晓亮,等.2010a.昆仑山与汶川强烈地震对青藏块体东北缘地壳运动及应变积累的影响[J].地球学报,31(1):32-42.
张希,张晓亮,张四新,等.2010b.青藏块体东北缘近期GPS水平运动特征与汶川大震影响[J].地震研究,33(4):265-268.
马宗晋.1982.地震与断裂关系的讨论,中国活动断裂[M].北京:地震出版社.
苏怡之,王进英.1991.汾渭地震带的地震活动性[J].内陆地震,6(2):143-150.
万永革,沈正康,盛书中,等.2009.2008年汶川大地震对周围断层的影响[J].地震学报,31(2):128-139.
张培震,闻学泽,徐锡伟,等.2009.2008年汶川8.0级特大地震孕育和发生的多单元组合模式[J].科学通报,54(7):944-953.
张世民.2000.汾渭地堑系盆地发育进程的差异及其控震作用[J].地质力学学报,6(2):30-37.
张希,崔笃信,蒋锋云.2009a.基于GPS观测的汶川地震参数反演与库仑应力变化分析[J].地震研究,32(4):351-356.
张希,崔笃信,张四新,等.2009b.地形变观测揭示的汶川MS8.0级地震同震响应与影响[J].武汉大学学报:信息科学版,34(10):1204-1209.
张希,王庆良,唐红涛,等.2011.汶川地震孕震背景与同震变化的铲形断层位错模拟[J].地球学报,32(2):189-194.
张希,王双绪,张晓亮,等.2010a.昆仑山与汶川强烈地震对青藏块体东北缘地壳运动及应变积累的影响[J].地球学报,31(1):32-42.
张希,张晓亮,张四新,等.2010b.青藏块体东北缘近期GPS水平运动特征与汶川大震影响[J].地震研究,33(4):265-268.
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