川滇地区地震活动统计单元的新划分
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摘要
为了地震预测研究的需要 ,基于区域地震构造的新认识与新资料 ,在川滇地区重新划分出 19个地震区(带 )。这些地震区 (带 )的实际意义是可作为地震活动性的地理统计单元。每一地震区 (带 )的划分除了与具体的、相对独立的活动构造单元相联系外 ,还考虑了历史及现今强地震的空间分布、现今弱震分布等因素。文中描述了各个地震区 (带 )的活动构造与历史强震活动背景 ,以及主要断裂的活动习性。基于这种新的地震区 (带 )划分方案 ,对其中两个区 (带 )在 2 0 0 1年青海昆仑山和 1970年云南通海两次大地震前的地震活动进行统计分析 ,结果表明 :依据这种与相对独立活动构造单元紧密关联的地震区 (带 )的划分方案可获得良好的地震活动前兆信息。
To meet the need of the research on earthquake prediction, the Sichuan-Yunnan r e gion has been re-divided into 19 seismic zones (or belts) on the basis of recen t cognition and the latest data of regional seismic tectonics. The practical sign ificance of these re-zoned seismic zones (or belts) is that they can be geogroph ically taken as statistical units for seismicity. Delineating each of the seis mic zones (or belts) is related to a specific and relatively independent active tectonic unit. In addition, several other factors, such as spatial distribution of historical strong earthquakes, seismicity of current small earthquakes, etc, are considered. Furthermore, for each seismic zone (or belt), the active tectoni c characteristics, the backgrounds of historical strong earthquakes and the faulting behaviors of main active faults are described. On the basis of new zoni ng scheme for seismicity, seismic activities of two of the 19 zones before the occu rrence of the 2001 earthquake in Kunlun Mounatin Pass, Qinghai and the earthquak e in Tonghai, Yunnan are analyzed through statistic method. The result shows that the ideal precursory information of seismicity can be obtaine d by using the new zoning scheme closely linked with relatively independent acti ve tectonic units.
To meet the need of the research on earthquake prediction, the Sichuan-Yunnan r e gion has been re-divided into 19 seismic zones (or belts) on the basis of recen t cognition and the latest data of regional seismic tectonics. The practical sign ificance of these re-zoned seismic zones (or belts) is that they can be geogroph ically taken as statistical units for seismicity. Delineating each of the seis mic zones (or belts) is related to a specific and relatively independent active tectonic unit. In addition, several other factors, such as spatial distribution of historical strong earthquakes, seismicity of current small earthquakes, etc, are considered. Furthermore, for each seismic zone (or belt), the active tectoni c characteristics, the backgrounds of historical strong earthquakes and the faulting behaviors of main active faults are described. On the basis of new zoni ng scheme for seismicity, seismic activities of two of the 19 zones before the occu rrence of the 2001 earthquake in Kunlun Mounatin Pass, Qinghai and the earthquak e in Tonghai, Yunnan are analyzed through statistic method. The result shows that the ideal precursory information of seismicity can be obtaine d by using the new zoning scheme closely linked with relatively independent acti ve tectonic units.
引文
[1]陈章立,薛峰.选择未来大震危险区的一种方法—地震空区问题述评[J].地震科学研究,1982,(3):41-46.
[2]马宗晋,傅征祥,张郢珍等.中国九大地震[M ].北京:地震出版社,1984,1-216.
[3]刘祖荫,皇甫岗,金志林(主编).一九七○年通海地震[M ].北京:地震出版社,1999,1-257.
[4]闻学泽.四川西部鲜水河—安宁河—则木河断裂带的地震破裂分段特征[J].地震地质,2000,(22)3:239-249.
[5]闻学泽,徐锡伟,郑荣章等.甘孜—玉树断裂的平均滑动速率与近代大地震破裂[J].中国科学(D),2003,33(增刊):199-208.
[6]徐锡伟,闻学泽,郑荣章.川滇地区活动块体最新构造变动样式及其动力来源[J],中国科学(D),2002,33(增刊):151-162.
[7]易桂喜,闻学泽.时间—震级可预报模式在南北地震带分段危险性评估中的应用[J].地震,2000,20(1):71-79.
[8]易桂喜,闻学泽.活动断裂带的整体地震复发行为及其与分段地震复发行为的关系[J].地震学报,2000,22(5):527-537.
[9]易桂喜,闻学泽,徐锡伟.川滇地区若干活动断裂带整体的强地震复发特征研究[J].中国地震,2002,18(3):267-276.
[10]易桂喜,闻学泽.四川地区强震地震学短期预报指标及其预测效能的初步研究[J].地震研究,2003,26(增刊).
[11]张培震,邓起东,张国民等.中国大陆的强震活动与活动地块[J].中国科学(D),2003,33(增刊):12-20.
[12]AllenCR ,LouZL ,QianH ,etal1991,Fieldstudyofahighlyactivefaultzone:TheXianshuihefaultofsouthwesternChina[J].GeolSocAmBull,103:1178-1199.
[13]TapponnierP ,PeltzerG ,LeDainAY ,etal.1982,PropagatingextrusiontectonicsinAsia:Newinsightsfromsimpleexperimentswithplas ticine[J].Geology,10(12):611-616.
[14]WenXueze,JiaJinkang,PanMao,etalRecentsliprates,earthquakerecurrenceintervalsandstrongseismichazardsonthenorthwesternsegmentoftheXianshuihefaultzoneEarthquakeResearchinChina[J ],1988,2(4):432-451.
[2]马宗晋,傅征祥,张郢珍等.中国九大地震[M ].北京:地震出版社,1984,1-216.
[3]刘祖荫,皇甫岗,金志林(主编).一九七○年通海地震[M ].北京:地震出版社,1999,1-257.
[4]闻学泽.四川西部鲜水河—安宁河—则木河断裂带的地震破裂分段特征[J].地震地质,2000,(22)3:239-249.
[5]闻学泽,徐锡伟,郑荣章等.甘孜—玉树断裂的平均滑动速率与近代大地震破裂[J].中国科学(D),2003,33(增刊):199-208.
[6]徐锡伟,闻学泽,郑荣章.川滇地区活动块体最新构造变动样式及其动力来源[J],中国科学(D),2002,33(增刊):151-162.
[7]易桂喜,闻学泽.时间—震级可预报模式在南北地震带分段危险性评估中的应用[J].地震,2000,20(1):71-79.
[8]易桂喜,闻学泽.活动断裂带的整体地震复发行为及其与分段地震复发行为的关系[J].地震学报,2000,22(5):527-537.
[9]易桂喜,闻学泽,徐锡伟.川滇地区若干活动断裂带整体的强地震复发特征研究[J].中国地震,2002,18(3):267-276.
[10]易桂喜,闻学泽.四川地区强震地震学短期预报指标及其预测效能的初步研究[J].地震研究,2003,26(增刊).
[11]张培震,邓起东,张国民等.中国大陆的强震活动与活动地块[J].中国科学(D),2003,33(增刊):12-20.
[12]AllenCR ,LouZL ,QianH ,etal1991,Fieldstudyofahighlyactivefaultzone:TheXianshuihefaultofsouthwesternChina[J].GeolSocAmBull,103:1178-1199.
[13]TapponnierP ,PeltzerG ,LeDainAY ,etal.1982,PropagatingextrusiontectonicsinAsia:Newinsightsfromsimpleexperimentswithplas ticine[J].Geology,10(12):611-616.
[14]WenXueze,JiaJinkang,PanMao,etalRecentsliprates,earthquakerecurrenceintervalsandstrongseismichazardsonthenorthwesternsegmentoftheXianshuihefaultzoneEarthquakeResearchinChina[J ],1988,2(4):432-451.
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