广西防城-灵山断裂带北东支灵山段活动性初探
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摘要
防城-灵山断裂北东支灵山段为北部湾经济区内地震活动最为频繁的地区。为了查明防城-灵山断裂带北东支灵山段的断裂活动变形特征,尤其是在活动性特征的关键部位控制断裂构造的产状特征,断裂产状深部变化、断裂带规模及展布方向,本文通过遥感解译、地质地貌调查以及浅层地震和地质雷达勘探等物探方法对广西防城-灵山断裂带北东支灵山段的平面展布特征以及活动性进行了初步探讨。结果表明该断裂带呈北东向展布并被多条北西向断裂错断,东西边界分别为灵山断裂和石塘断裂。灵山断裂错断了晚更新世洪积扇阶地,河流流经灵山断裂后发生右旋偏转;石塘断裂表现为宽约250 m的破碎带,次级断裂密集发育。物探结果显示防城-灵山断裂北东支灵山段的东西两支在晚更新世以来均具有较强的活动性。
Seismic activity in northeast branch of Fangcheng-Linshan fault appeared most frequently in Beibu Gulf economic zone.The work of this paper is to identify the deformation characteristics and activity of northeast branch of Fangcheng-Linshan fault,especially the occurrence and its changes in depth,the scales and spreading characteristics of the faults in the key parts.Areal distribution characteristics and activity of the northeast branch of the Fangcheng-Lingshan fault zone in Lingshan was preliminary discusses by remote sensing interpretation,geological and geomorphological survey,as well as shallow seismic reflection and ground prospecting radar(GPR).The results indicated that the fault was offset by a number of northwest-trending faults,east and west margin of which are Lingshan fault and Shitang fault,respectively.Linshan fault offset the alluvial fan terraces formed in late Pleistocene.The streams were dextral at Linshan fault.Shitang fault presented a fracture zone with 250 m width,where secondary faults were dense.The images of geophysical exploration showed that both of the two branches of Fangcheng-Linshan fault had a relative strong activity since the Late Pleistocene.
Seismic activity in northeast branch of Fangcheng-Linshan fault appeared most frequently in Beibu Gulf economic zone.The work of this paper is to identify the deformation characteristics and activity of northeast branch of Fangcheng-Linshan fault,especially the occurrence and its changes in depth,the scales and spreading characteristics of the faults in the key parts.Areal distribution characteristics and activity of the northeast branch of the Fangcheng-Lingshan fault zone in Lingshan was preliminary discusses by remote sensing interpretation,geological and geomorphological survey,as well as shallow seismic reflection and ground prospecting radar(GPR).The results indicated that the fault was offset by a number of northwest-trending faults,east and west margin of which are Lingshan fault and Shitang fault,respectively.Linshan fault offset the alluvial fan terraces formed in late Pleistocene.The streams were dextral at Linshan fault.Shitang fault presented a fracture zone with 250 m width,where secondary faults were dense.The images of geophysical exploration showed that both of the two branches of Fangcheng-Linshan fault had a relative strong activity since the Late Pleistocene.
引文
[1]万贵龙,张德会,张守仁.天津北大港构造带东翼断裂活动浅析[J].地球学报.2011,3(3):373-381
[2]王洪聚,刘保华,李西双.晚更新世以来渤海南部海域断裂活动性[J].地球科学进展.2011,26(5):556-564.
[3]黎小刚,周荣军,刘保金,等.四川青川县乔庄镇城区活动断裂探测与评价[J].震灾防御技术.2010,5(4):428-438.
[4]孙芳强,苏生瑞,彭建兵.西安地区活动断裂活动性的Fuzzy-Grey模式评价[J].工程地质学报.2010.18(2):183-188.
[5]Feng Xi-jie,Dai Wang-qiang.Lateral migration of fault ac-tivity in Weihe basin[J].Earthquake Science.2004,7(2):190-199.
[6]广西壮族自治区地方志编纂委员会.广西通志(地震志)[M].南宁:广西人民出版社.1990.
[7]周本刚,杨晓平,杜龙.广西防城-灵山断裂带活动性分段与潜在震源区划分段研究[J].震灾防御技术.2008,3(1):8-19.
[8]黄河生,任镇寰,杨廉法.广西灵山地区断裂活动性与土壤中汞气含量变化[J].华南地震.1990,10(1):42-49.
[9]张景发,王四龙,侯孝强.活动断裂带中遥感数字图像处理技术--以鲜水河活动断裂为例[J].地震地质.1996,18(1):1-10.
[10]谢韬,张启跃,刘伟等.罗平地区断裂构造的遥感研究[J].中国地质.2010,37(5):1405-1409.
[11]姜文亮,张景发,陈丁等.利用遥感、中立多源信息研究郯-庐断裂带苏-鲁段构造特征[J].地球学报.2011,32(2):143-153.
[12]周林辉,林国清.地质雷达及浅层地震在泥质粉砂岩中断裂带上的曲线特征[J].地质灾害与环境保护.2002,13(3):36-39.
[13]薛建,贾建秀,黄航等.应用地质雷达探测活动断层[J].吉林大学学报(地球科学版).2008,38(2):347-350.
[14]胡毅力,温一波,段继平.滇池盆地东缘白邑-横冲断裂南段的浅层地震勘探研究[J].震灾防御技术.2010,5(4):451-460.
[15]吴继远.灵山断褶带地质构造基本特征及其大地构造性质的探讨[J].地质科学.1980,(2):125-133.
[16]钟新基.广西新构造运动的主要表现及构造应力场分析[J].华南地震.1981,1(1):60-71.
[2]王洪聚,刘保华,李西双.晚更新世以来渤海南部海域断裂活动性[J].地球科学进展.2011,26(5):556-564.
[3]黎小刚,周荣军,刘保金,等.四川青川县乔庄镇城区活动断裂探测与评价[J].震灾防御技术.2010,5(4):428-438.
[4]孙芳强,苏生瑞,彭建兵.西安地区活动断裂活动性的Fuzzy-Grey模式评价[J].工程地质学报.2010.18(2):183-188.
[5]Feng Xi-jie,Dai Wang-qiang.Lateral migration of fault ac-tivity in Weihe basin[J].Earthquake Science.2004,7(2):190-199.
[6]广西壮族自治区地方志编纂委员会.广西通志(地震志)[M].南宁:广西人民出版社.1990.
[7]周本刚,杨晓平,杜龙.广西防城-灵山断裂带活动性分段与潜在震源区划分段研究[J].震灾防御技术.2008,3(1):8-19.
[8]黄河生,任镇寰,杨廉法.广西灵山地区断裂活动性与土壤中汞气含量变化[J].华南地震.1990,10(1):42-49.
[9]张景发,王四龙,侯孝强.活动断裂带中遥感数字图像处理技术--以鲜水河活动断裂为例[J].地震地质.1996,18(1):1-10.
[10]谢韬,张启跃,刘伟等.罗平地区断裂构造的遥感研究[J].中国地质.2010,37(5):1405-1409.
[11]姜文亮,张景发,陈丁等.利用遥感、中立多源信息研究郯-庐断裂带苏-鲁段构造特征[J].地球学报.2011,32(2):143-153.
[12]周林辉,林国清.地质雷达及浅层地震在泥质粉砂岩中断裂带上的曲线特征[J].地质灾害与环境保护.2002,13(3):36-39.
[13]薛建,贾建秀,黄航等.应用地质雷达探测活动断层[J].吉林大学学报(地球科学版).2008,38(2):347-350.
[14]胡毅力,温一波,段继平.滇池盆地东缘白邑-横冲断裂南段的浅层地震勘探研究[J].震灾防御技术.2010,5(4):451-460.
[15]吴继远.灵山断褶带地质构造基本特征及其大地构造性质的探讨[J].地质科学.1980,(2):125-133.
[16]钟新基.广西新构造运动的主要表现及构造应力场分析[J].华南地震.1981,1(1):60-71.
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