新疆北部构造区带地震活动状态分析
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摘要
在对新疆北部地区地质构造、构造运动强度、历史强地震活动特征、地壳缩短速率以及局部应力场特征综合研究的基础上,将新疆北部地区划分为阿尔泰地震带、乌鲁木齐、北天山西段、中天山和东天山5个地震构造区带。通过计算上述各构造区带年应变能释放均值、折合震级、不同震级下限的地震年发生率、b值和应变加速释放模型参数m值等参数,对各构造区带中地震活动状态进行了定量分析,进而提取了各构造区带地震活动状态的特征指标,为地震趋势分析和判定提供了定量的依据。
Based on the comprehensive research on geological structure,tectonic motion strength,history strong earthquake activity,crustal shorten velocity and local stress field characters,the northern Xinijang region is divided into five tectonic regions,they are Altai seismic belt,Urumqi tectonic region,western segment of northern Tianshan mountain,central part of Tianshan mountain and eastern segment of Tianshan mountain.By calculating the mean value of strain energy release,converting magnitude,annual occurrence rate with different magnitudes,b value and parameter m of strain accelerating release model etc.,the seismicity state of each tectonic region are analyzed quantitatively,and the character index of activity state in every tectonic regions are obtained.It may offer the quantitative criteria for seismic trend analysis and judgment.
Based on the comprehensive research on geological structure,tectonic motion strength,history strong earthquake activity,crustal shorten velocity and local stress field characters,the northern Xinijang region is divided into five tectonic regions,they are Altai seismic belt,Urumqi tectonic region,western segment of northern Tianshan mountain,central part of Tianshan mountain and eastern segment of Tianshan mountain.By calculating the mean value of strain energy release,converting magnitude,annual occurrence rate with different magnitudes,b value and parameter m of strain accelerating release model etc.,the seismicity state of each tectonic region are analyzed quantitatively,and the character index of activity state in every tectonic regions are obtained.It may offer the quantitative criteria for seismic trend analysis and judgment.
引文
①王琼,等.新疆地区地震活动状态动态评价》研究报告.新疆地震局.
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[12]蒋海昆,苗青壮,董祥,等.中国大陆7级强震前中小地震应变释放特征[J].地震,2009,29(3):1-10.
[1]石特临,杨立明.区域地震活动状态与地震形势——以甘肃、山西两个区域为例[J].西北地震学报,1999,21(3):225-233.
[2]马集遐.中国大陆地震构造带的初步划分及其应用[J].中国地震,1994,10(3):251-261.
[3]朱令人.新疆通志(十一卷,地震志)[M].乌鲁木齐:新疆人民出版社,2002:307-311.
[4]李莹甄,沈军,王海涛.天山各分区地震活动性与能量积累阶段关系初探[J].中国地震,2005,21(4):496-507.
[5]张培震,王琪,马宗晋.中国大陆现今构造运动的GPS速度场与活动地块[J].地学前缘,2002,9(2):430-441.
[6]邓起东,张培震,冉勇康,等.中国活动构造与地震活动[J].地学前缘,2003,10(特刊):66-73.
[7]许忠淮,汪素云,黄雨蕊,等.由大量的地震资料推断的我国大陆构造应力场[J].地球物理学报,1989,32(6):636-647.
[8]崔效锋,谢富仁,赵建涛.中国及邻区震源机制解的分区特征[J].地震地质,2005,27(2):298-307.
[9]高国英,温和平,聂晓红.1991-2002年新疆中强震震源机制解分析[J].地震,2005,25(1):81-87.
[10]高国英,曲延军.乌鲁木齐地区构造应力与中强震活动特征研究[J].内陆地震,1998,12(4):296-303.
[11]王海涛,李莹甄,屠泓为.新疆历史地震目录完整性分析[J].内陆地震,2006,20(1):10-17.
[12]蒋海昆,苗青壮,董祥,等.中国大陆7级强震前中小地震应变释放特征[J].地震,2009,29(3):1-10.
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