福建九龙江下游NW向断裂带第四纪以来活动特征
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摘要
通过对福建九龙江下游NW向断裂带断层上覆地层的切割关系、断裂两侧第四纪等时地貌面的差异性变化、浅层地震勘探、断层两侧钻孔探测等资料分析,研究了断裂第四纪以来的活动特征及断裂构造的组合特征。结果表明:(1)郭坑—江东桥断裂(F1)、珠坑断裂(F3)、金峰—大帽山断裂(F7)为早第四纪(Q1-2)断裂;岱山岩—珩坑断裂(F6)的观音山—古湖段为早第四纪(Q1-2)断裂、古湖—洪塘段为晚更新世活动断裂;覆船山—康山断裂(F4)、九龙江(西溪)断裂(F5)为晚更新世早期活动断裂,海沧—钱屿断裂(F2)为晚更新世活动断裂。(2)郭坑—江东桥断裂和金峰—大帽山断裂将本区切割成3个地块,形成了小田坑山地垒、漳州地堑、锅尖山地垒的构造组合形式。漳州地堑再被覆船山—康山断裂和岱山岩-珩坑断裂切割成3个地块,又形成了较小的圆山地垒、九龙江西溪河谷地堑、马鞍山地垒的构造组合形式。
The Quaternary active features and combination relation of NW-striking fault zone in the downstream area of Jiulongjiang in Fujian province are researched through analysis of Quaternary geology,geomorphology,high-resolution seismic profiling,dating and drilling.The results show that:(1) The Guokeng-Jiangdong fault(F1),Zhukeng fault(F3) and Jinfeng-Damaoshan fault(F7) actived in early Quaternary(Q1-2).Daishanyan-Hengkeng fault(F6) actived in early Quaternary and late Pleistocene on different segments.The Fuchuangshan-Kangshan fault(F4) and Jiulongjiang(west stream) fault(F5) actived in early late Pleistocene.The Haicang-Qiangyu fault(F2) actived in late Pleistocene.(2) The Guokeng-Jiangdongqiao fault and the Jinfeng-Damaoshan fault divided the research area into 3 blocks and formed the Structural Assemblage of Xiaotiankeng horst,Zhangzhou graben and Guojianshan horst.Than the Zhangzhou graben was divided into 3 blocks by the Fuchuanshan-Kangshan fault and the Daishanyan-Hengkeng fault,and formed the smaller Structural Assemblage of Yuanshan horst,Jiulongjiang Xixi valley graben and Maanshan horst.
The Quaternary active features and combination relation of NW-striking fault zone in the downstream area of Jiulongjiang in Fujian province are researched through analysis of Quaternary geology,geomorphology,high-resolution seismic profiling,dating and drilling.The results show that:(1) The Guokeng-Jiangdong fault(F1),Zhukeng fault(F3) and Jinfeng-Damaoshan fault(F7) actived in early Quaternary(Q1-2).Daishanyan-Hengkeng fault(F6) actived in early Quaternary and late Pleistocene on different segments.The Fuchuangshan-Kangshan fault(F4) and Jiulongjiang(west stream) fault(F5) actived in early late Pleistocene.The Haicang-Qiangyu fault(F2) actived in late Pleistocene.(2) The Guokeng-Jiangdongqiao fault and the Jinfeng-Damaoshan fault divided the research area into 3 blocks and formed the Structural Assemblage of Xiaotiankeng horst,Zhangzhou graben and Guojianshan horst.Than the Zhangzhou graben was divided into 3 blocks by the Fuchuanshan-Kangshan fault and the Daishanyan-Hengkeng fault,and formed the smaller Structural Assemblage of Yuanshan horst,Jiulongjiang Xixi valley graben and Maanshan horst.
引文
[1]黄卿团,丁祥焕,庄进耀.福建东南沿海晚第四纪断陷构造的形成和发育[A]∥国家地震局地质研究所编.活动断裂研究(7)[G].北京:地震出版社,1999:67-80.
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[3]黄卿团,付萍,郑韶鹏.福建东南沿海50m以下的地貌面与断裂活动性[J].地震地质,2007,29(3):578-596.
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[5]黄卿团,汪一鹏,宋方敏,等.福建漳州盆地岱山岩-珩坑北西向断裂第四纪活动特征[J].华南地震,2001,21(2);28-35.
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②厦门地震勘测研究中心.漳州市活断层分布图说明书.2003.
③中国地震局地质研究所,等.华南沿海(珠江三角洲、闽东南等)地震重点防御区孕震(隐伏)活动构造的定量研究与强震危险性评估.2000.
[2]丁祥焕,王耀东,叶盛基,等.福建东南沿海活动断裂与地震[M].福州:福建科学技术出版社,1999.
[3]黄卿团,付萍,郑韶鹏.福建东南沿海50m以下的地貌面与断裂活动性[J].地震地质,2007,29(3):578-596.
[4]朱金芳,谢志招,曲国胜,等.闽南地区城市活动构造与地震[M].北京:科学出版社,2008.
[5]黄卿团,汪一鹏,宋方敏,等.福建漳州盆地岱山岩-珩坑北西向断裂第四纪活动特征[J].华南地震,2001,21(2);28-35.
[6]黄卿团,郑韶鹏.福建东南沿海及邻区活动断裂的微地貌研究[J].地球物理学进展,2006,21(4):1099-1107.
[7]许仪西,占惠,方韡,等.邵武-河源断裂带中段重磁、垂直形变场特征及其与地震的关系[J].西北地震学报,2009,31(3):277-284
①中国地震局地壳应力研究所.厦漳跨海大桥工程场地地震安全性评价报告.2000.
②厦门地震勘测研究中心.漳州市活断层分布图说明书.2003.
③中国地震局地质研究所,等.华南沿海(珠江三角洲、闽东南等)地震重点防御区孕震(隐伏)活动构造的定量研究与强震危险性评估.2000.
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