红河断裂带及其邻区的震源机制解特征及其反映的断裂活动分段性
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摘要
对红河断裂带及其邻区219个地震的相关数据进行震源机制解分析,阐述了红河断裂带不同区段的地震分布特征及其地震类型的差异性,结合对研究区区域深部动力学条件的分析,从地震发生及其深部动力学特征分析红河断裂带活动的分段性特征,取得如下新认识:(1)红河断裂带北西段由于受印-藏碰撞影响而显现出挤压应力场特征,断裂活动具有逆断特征和局部拉张应力场下的正断特征;(2)中段作为华南亚板块与印支亚板块之间的主体剪切活动带,显现剪切应力场特征,断裂以剪切活动为主;(3)南东段在断裂带右旋走滑的基础上,受到深部物质抬升、岩石圈拉伸减薄的影响,而表现出张扭应力场性质,断裂活动显现张扭特征。
Focal mechanism solutions of 219 earthquakes which happened in the Red River Fault Zone(RRFZ) and its adjacent areas were collected and analyzed.Based on these analyses,the distribution of earthquakes in different segments of the RRFZ and their difference in seismic types,as well as the regional deep dynamics condition were discussed.The characteristics of the RRFZ activity in different segments were concluded as follows.(1) The northwestern segment of the RRFZ shows a characteristic of a compressional stress field as a result of the India-Tibet collision,and the fault activity is characterized by thrusting with local extension;(2) As a primary shear zone between the Indochina Plate and the South China Plate,the middle segment of the RRFZ displays a characteristic of a shear stress field,and the fault activity is characterized by strike-slip;(3) Besides dextral slip,lithosphere in the southeast segment of the RRFZ experienced extension and thinning due to the upwelling of deep material,which resulted in the dextral transtensional stress field and tense-shearing fault activity in this section.
Focal mechanism solutions of 219 earthquakes which happened in the Red River Fault Zone(RRFZ) and its adjacent areas were collected and analyzed.Based on these analyses,the distribution of earthquakes in different segments of the RRFZ and their difference in seismic types,as well as the regional deep dynamics condition were discussed.The characteristics of the RRFZ activity in different segments were concluded as follows.(1) The northwestern segment of the RRFZ shows a characteristic of a compressional stress field as a result of the India-Tibet collision,and the fault activity is characterized by thrusting with local extension;(2) As a primary shear zone between the Indochina Plate and the South China Plate,the middle segment of the RRFZ displays a characteristic of a shear stress field,and the fault activity is characterized by strike-slip;(3) Besides dextral slip,lithosphere in the southeast segment of the RRFZ experienced extension and thinning due to the upwelling of deep material,which resulted in the dextral transtensional stress field and tense-shearing fault activity in this section.
引文
[1]虢顺民,计凤桔,向宏发,等.红河活动断裂带[M].北京:海洋出版社,2001:1—23.
[2]朱俊江,詹文欢,唐诚,等.红河断裂带活动性研究[J].华南地震,2003,23(2):13—19.
[3]孙珍,钟志洪,周蒂,等.红河断裂带的新生代变形机制及莺歌海盆地的实验证据[J].热带海洋学报,2003,22(2):1—9.
[4]郭令智,钟志洪,王良书,等.莺歌海盆地周边区域构造演化[J].高校地质学报,2001,7(1):1—12.
[5]李祥根.构造地貌.滇西北地区活动断裂[M].北京:地震出版社,1990:49—59.
[6]ALLEN C R,GILLESPIE A R,HAN Y,et al.Red Riv-er and associated faults,Yunnan Province,China:Quater-nary Geology,slip rates and seismic hazard[J].Geol SocAm Bull,1984,95:686—700.
[7]LELOUP P H,HARRISON T M,RYERSON F,et al.Structural,petrological and thermal evolution of a ertiaryductile strike-slip shear zone,Diancang Shan,Yunnan[J].J of Geophy Res,1993,98:6715—6743.
[8]The Harvard CMT catalog[EB/OL].http://www.globa-lcmt.org/CMTsearch.html.
[9]中国地震台网中心.地震数据管理与服务系统地震数据国家台网大震速报目录[EB/OL].http://www.csndmc.ac.cn/newweb/data.htm.
[10]魏柏林,等.东南沿海地震活动特征[M].北京:地震出版社,2001:452—454.
[11]吴建平,明跃红,王椿镛,等.云南地区中小地震震源机制及构造应力场研究[J].地震学报,2004,26(5):457—465.
[12]APPERSON K D,CLIFF F.Sums of moment tensors forearthquakes near subduction zones[J].EOS Trans AmGeophys Union,1988,69:1438.
[13]马文涛,徐锡伟,徐平,等.地震三角形分类图解法与华北地区地震成因分析[J].地球物理学进展,2004,19(2):379—385.
[14]卢占武,高锐,李秋生,等.中国青藏高原深部地球物理探测与地球动力学研究(1958—2004)[J].地球物理学报,2006,49(3):753—770.
[15]熊熊,滕吉文.青藏高原东缘地壳运动与深部过程的研究[J].地球物理学报,2002,45(4):507—515.
[16]崔军文,张晓卫,唐哲民.青藏高原的构造分区及其边界的变形构造特征[J].中国地质,2006,33(2):256—267.
[17]YU Jin,MARCIA K McNutt,ZHU Yongsheng.Evidencefrom gravity and topography data for folding of Tibet[J].Nature,1994,371:669—674.
[18]熊熊,许厚泽,滕吉文.青藏高原物质东流力学背景探讨[J].地壳形变与地震,2001,21(2):1—7.
[19]韩键,周硕愚,宋永厚,等.红河断裂带的分段特性及构造网络蕴震观[J].地壳形变与地震,1990,10(2):74—83.
[20]龚再升,李思田.南海北部大陆边缘盆地分析与油气聚集[M].北京:科学出版社,1997:1—20.
[21]龚再升,李思田.南海北部大陆边缘盆地油气成藏动力学研究[M].北京:科学出版社,1999:25—29.
[22]徐辉龙,丘学林,孙金龙.莺歌海盆地新构造运动与超压体系喷溢油气成藏作用[J].海洋地质与第四纪地质,2006,26(3):93—100.
[23]李纯泉.莺歌海盆地流体底辟构造及其对天然气成藏的贡献[J].中国海上油气(地质),2000,14(4):253—257.
[24]殷秀兰,李思田,杨计海,等.莺歌海盆地超压流体活动与断裂系统的相互关系[J].地球学报,2002,23(2):141—146.
[25]殷秀兰,李思田,杨计海,等.琼西莺歌海盆地断裂系统的成因机制[J].地质通报,2002,21(10):653—657.
[26]朱俊江,詹文欢,丘学林,等.红河断裂带两侧地震震源机制及构造意义[J].大地构造与成矿学,2004,28(3):239—247.
[27]罗振暖,胡瑞贺,李纯清.北部湾地震的动力学参数与应力场[J].华南地震,1996,16(3):72—76.
[28]CAO Dinh Trieu.Deep structure,recent dynamics and seis-mic activity in Red River Fault Zone in Vietnam[J].大地测量与地球动力学,2003,23(1):93—102.
[29]皇甫岗,石绍先.20世纪云南地震活动研究[J].地震研究,2000,23(1):1—9.
[2]朱俊江,詹文欢,唐诚,等.红河断裂带活动性研究[J].华南地震,2003,23(2):13—19.
[3]孙珍,钟志洪,周蒂,等.红河断裂带的新生代变形机制及莺歌海盆地的实验证据[J].热带海洋学报,2003,22(2):1—9.
[4]郭令智,钟志洪,王良书,等.莺歌海盆地周边区域构造演化[J].高校地质学报,2001,7(1):1—12.
[5]李祥根.构造地貌.滇西北地区活动断裂[M].北京:地震出版社,1990:49—59.
[6]ALLEN C R,GILLESPIE A R,HAN Y,et al.Red Riv-er and associated faults,Yunnan Province,China:Quater-nary Geology,slip rates and seismic hazard[J].Geol SocAm Bull,1984,95:686—700.
[7]LELOUP P H,HARRISON T M,RYERSON F,et al.Structural,petrological and thermal evolution of a ertiaryductile strike-slip shear zone,Diancang Shan,Yunnan[J].J of Geophy Res,1993,98:6715—6743.
[8]The Harvard CMT catalog[EB/OL].http://www.globa-lcmt.org/CMTsearch.html.
[9]中国地震台网中心.地震数据管理与服务系统地震数据国家台网大震速报目录[EB/OL].http://www.csndmc.ac.cn/newweb/data.htm.
[10]魏柏林,等.东南沿海地震活动特征[M].北京:地震出版社,2001:452—454.
[11]吴建平,明跃红,王椿镛,等.云南地区中小地震震源机制及构造应力场研究[J].地震学报,2004,26(5):457—465.
[12]APPERSON K D,CLIFF F.Sums of moment tensors forearthquakes near subduction zones[J].EOS Trans AmGeophys Union,1988,69:1438.
[13]马文涛,徐锡伟,徐平,等.地震三角形分类图解法与华北地区地震成因分析[J].地球物理学进展,2004,19(2):379—385.
[14]卢占武,高锐,李秋生,等.中国青藏高原深部地球物理探测与地球动力学研究(1958—2004)[J].地球物理学报,2006,49(3):753—770.
[15]熊熊,滕吉文.青藏高原东缘地壳运动与深部过程的研究[J].地球物理学报,2002,45(4):507—515.
[16]崔军文,张晓卫,唐哲民.青藏高原的构造分区及其边界的变形构造特征[J].中国地质,2006,33(2):256—267.
[17]YU Jin,MARCIA K McNutt,ZHU Yongsheng.Evidencefrom gravity and topography data for folding of Tibet[J].Nature,1994,371:669—674.
[18]熊熊,许厚泽,滕吉文.青藏高原物质东流力学背景探讨[J].地壳形变与地震,2001,21(2):1—7.
[19]韩键,周硕愚,宋永厚,等.红河断裂带的分段特性及构造网络蕴震观[J].地壳形变与地震,1990,10(2):74—83.
[20]龚再升,李思田.南海北部大陆边缘盆地分析与油气聚集[M].北京:科学出版社,1997:1—20.
[21]龚再升,李思田.南海北部大陆边缘盆地油气成藏动力学研究[M].北京:科学出版社,1999:25—29.
[22]徐辉龙,丘学林,孙金龙.莺歌海盆地新构造运动与超压体系喷溢油气成藏作用[J].海洋地质与第四纪地质,2006,26(3):93—100.
[23]李纯泉.莺歌海盆地流体底辟构造及其对天然气成藏的贡献[J].中国海上油气(地质),2000,14(4):253—257.
[24]殷秀兰,李思田,杨计海,等.莺歌海盆地超压流体活动与断裂系统的相互关系[J].地球学报,2002,23(2):141—146.
[25]殷秀兰,李思田,杨计海,等.琼西莺歌海盆地断裂系统的成因机制[J].地质通报,2002,21(10):653—657.
[26]朱俊江,詹文欢,丘学林,等.红河断裂带两侧地震震源机制及构造意义[J].大地构造与成矿学,2004,28(3):239—247.
[27]罗振暖,胡瑞贺,李纯清.北部湾地震的动力学参数与应力场[J].华南地震,1996,16(3):72—76.
[28]CAO Dinh Trieu.Deep structure,recent dynamics and seis-mic activity in Red River Fault Zone in Vietnam[J].大地测量与地球动力学,2003,23(1):93—102.
[29]皇甫岗,石绍先.20世纪云南地震活动研究[J].地震研究,2000,23(1):1—9.
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