| 广西防城-灵山断裂带北东支灵山段活动性初探 |
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| 引用本文： | 何军,刘怀庆,黎清华,朱章显.广西防城-灵山断裂带北东支灵山段活动性初探[J].华南地质与矿产,2012,28(1):71-78. |
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| 作者姓名： | 何军 刘怀庆 黎清华 朱章显 |
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| 作者单位： | 武汉地质矿产研究所,武汉,430205 |
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| 基金项目： | 中国地质调查局地质调查项目：北部湾经济区断裂活动性调查（K201009）资助 |
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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。
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| 关 键 词： | 防城-灵山断裂带北东支 灵山 活动性 |
Activity of the Northeasten Branch of Fangcheng-Lingshan Fault Zone in Lingshan,Guangxi,China |
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| HE Jun,LIU Huai-Qing,LI Qing-Hua,ZHU Zhang-Xian.Activity of the Northeasten Branch of Fangcheng-Lingshan Fault Zone in Lingshan,Guangxi,China[J].Geology and Mineral Resources of South China,2012,28(1):71-78. |
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| Authors: | HE Jun LIU Huai-Qing LI Qing-Hua ZHU Zhang-Xian |
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| Institution: | (Wuhan Institute of Geology and Minerals Resources,Wuhan 430205,China) |
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| Abstract: | 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. |
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| Keywords: | northeast branch of Fangcheng-Lingshan fault zone activity Lingshan Guangxi province |
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