新疆南部构造区带与地震活动状态研究
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摘要
以地震活动为主线并依据新疆地质构造运动、地壳缩短速率、断裂活动、局部应力场及历史强地震活动特征等的研究,将新疆南部地区初步划分为南天山东段、柯坪块体、喀什—乌恰交汇区及西昆仑地震带4个地震构造区带。利用新疆1900年以来的地震记录,在不同强度地震记录完整性分析的基础上,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。
Taking the earthquake activity as main line,according to the geological formation movement,crustal shortening rate,fault activity,local stress field and historical strong earthquake activity characteristics,the south part of Xinjiang is divided into the eastern part of south Tianshan mountain earthquake belt,Keping block,the Kashi and Wuqia intersection zone and west Kunlun mountain earthquake belt.Using the earthquake catalog in Xinjiang since 1900,on the basis of earthquake records integrity analysis of different intensity,the earthquake activity state in different structural belts is analyzed quantificationally through calculating the mean value of annual strain energy release,annual rate of earthquakes in different magnitude low limit,b value and strain energy accelerative releasing model parameters m value,and then extract the characteristic index of earthquake activity state in different structural belts,which provide quantitative basis for earthquake tendency analysis and judgment.
Taking the earthquake activity as main line,according to the geological formation movement,crustal shortening rate,fault activity,local stress field and historical strong earthquake activity characteristics,the south part of Xinjiang is divided into the eastern part of south Tianshan mountain earthquake belt,Keping block,the Kashi and Wuqia intersection zone and west Kunlun mountain earthquake belt.Using the earthquake catalog in Xinjiang since 1900,on the basis of earthquake records integrity analysis of different intensity,the earthquake activity state in different structural belts is analyzed quantificationally through calculating the mean value of annual strain energy release,annual rate of earthquakes in different magnitude low limit,b value and strain energy accelerative releasing model parameters m value,and then extract the characteristic index of earthquake activity state in different structural belts,which provide quantitative basis for earthquake tendency analysis and judgment.
引文
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[12]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.
[13]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.
[14]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王琼等.新疆地区地震活动状态动态评价研究报告.2009.
[2]高维明,郑朗荪.中国活动断裂的基本特征[J].地震,1993,(1):1-4.
[3]新疆维吾尔自治区地方志编纂委员会.新疆通志.地震志(十一卷)[M].乌鲁木齐:新疆人民出版社,2002:307-311.
[4]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.
[5]陈杰,曲国胜,胡军,等.帕米尔北缘弧形推覆构造带东段的基本特征与现代地震活动[J].地震地质,1997,19(4):301-312.
[6]冯先岳.天山全新世活动断裂及古地震研究[J].内陆地震,1995,9(3):217-226.
[7]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.
[8]沈军,李莹甄,汪一鹏.地震构造的能量积累和释放特征与新疆天山部分地区地震危险性分析[J].中国地震,2004,20(3):229-237.
[9]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.
[10]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.
[11]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.
[12]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.
[13]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.
[14]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王琼等.新疆地区地震活动状态动态评价研究报告.2009.
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