用共偏移距反射法拓展地质剖面的解释深度
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摘要
针对核电工程选址中的能动断层地质调查工作需要,提出了利用共偏移距浅层地震反射时间剖面来拓展地质剖面解释深度的技术方法,通过物性和岩性的综合解释来提高对能动断层鉴别及其产状确定的可靠性.探测试验结果表明该方法是有效可行的.地质剖面上描述的断裂破碎带在共偏移距时间剖面上反应明显,二者可以相互印证,优势互补.该技术方法可用于类似工程地质调查和第四系覆盖较薄地区的隐伏断层探测.
In order to meet the needs of capable fault geological survey on nuclear power project sites,this paper proposes a technical method of using common-offset shallow seismic reflection profiles to extend the interpretation depth of geological cross-sections.Through comprehensive interpretation of the physical properties and lithology,the identification of capable faults and determination of their attitude can be more reliable.The test results show that the method is effective and feasible.The fracture zones found on geological profiles are also visible on the common-offset shallow seismic reflection profiles.The geological and seismic interpretations may verify each other.The technical approach provided by this paper can be applied to similar engineering geological investigations,and also to buried fault detection in a thin Quaternary covered area.
In order to meet the needs of capable fault geological survey on nuclear power project sites,this paper proposes a technical method of using common-offset shallow seismic reflection profiles to extend the interpretation depth of geological cross-sections.Through comprehensive interpretation of the physical properties and lithology,the identification of capable faults and determination of their attitude can be more reliable.The test results show that the method is effective and feasible.The fracture zones found on geological profiles are also visible on the common-offset shallow seismic reflection profiles.The geological and seismic interpretations may verify each other.The technical approach provided by this paper can be applied to similar engineering geological investigations,and also to buried fault detection in a thin Quaternary covered area.
引文
方盛明,张先康,刘保金,徐锡伟,白登海,姬继法.2002.探测大城市活断层的地球物理方法[J].地震地质,24(4):607-613.
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刘保金,张先康,方盛明,朱金芳,黄昭,黄宗林,赵成斌,段永红,王善雄,郑德刚.2002.城市活断层探测的高分辨率浅层地震数据采集技术[J].地震地质,24(4):524-532.
刘保金,姬继法,徐朝繁,袁洪克,廖旭,白云,万波.2006.共偏移距地震反射波方法用于城市活断层探测[J].地震地质,28(3):411-418.
王辉,丁志峰.2006,浅层地震勘探资料处理中的速度分析参数选取[J].地震地质,28(4):597-603.
杨祥森,林昀,崔德海.2007.地震映像法在铁路隧道隐伏岩溶勘查中的应用[J].工程地球物理学报,4(5):470-474.
Haberland C,Maercklin N,Kesten D,Ryberg T,Janssen Ch,Agnon A,Weber M,Schulze A,Qabbani I,El-Kelani R.2007.Shallowarchitecture of the Wadi Araba fault(Dead Sea Transform)fromhigh-resolution seismicinvestigations[J].Tectonophysics,432:37-50.
Ivanov J,Miller R D,Lacombe P,Johnson C D,Lane J W.2006.Delineating a shallowfault zone and dipping bedrockstrata using multichannal analysis of surface waves with a land streamer[J].Geophysics,71(5):A39-A42.
Jeng Y,Chen C S,Yu H M,Jeng AS,Tang C Y,Lin MJ.2007.Ultrashallowseismic experiment on a trenched sectionof the Chelunpu fault zone,Tai wan[J].Tectonophysics,443:255-270.
Li Y G,Chester F M,Vidale J E.2001.Shallowseismic profiling of the exhumed punchbowl fault zone,Southern Cali-fornia[J].Bull Seism Soc Amer,91(6):1820-1830.
Young R A,Hoyos J.2001.Near-surface,SH-wave surveys in unconsolidated,alluvial sediments[J].The LeadingEdge,20(9):936-948.
何正勤,陈宇坤,叶太兰,王向东,王辉,贾辉.2007.浅层地震勘探在沿海地区隐伏断层探测中的应用[J].地震地质,29(2):363-372.
刘保金,张先康,方盛明,朱金芳,黄昭,黄宗林,赵成斌,段永红,王善雄,郑德刚.2002.城市活断层探测的高分辨率浅层地震数据采集技术[J].地震地质,24(4):524-532.
刘保金,姬继法,徐朝繁,袁洪克,廖旭,白云,万波.2006.共偏移距地震反射波方法用于城市活断层探测[J].地震地质,28(3):411-418.
王辉,丁志峰.2006,浅层地震勘探资料处理中的速度分析参数选取[J].地震地质,28(4):597-603.
杨祥森,林昀,崔德海.2007.地震映像法在铁路隧道隐伏岩溶勘查中的应用[J].工程地球物理学报,4(5):470-474.
Haberland C,Maercklin N,Kesten D,Ryberg T,Janssen Ch,Agnon A,Weber M,Schulze A,Qabbani I,El-Kelani R.2007.Shallowarchitecture of the Wadi Araba fault(Dead Sea Transform)fromhigh-resolution seismicinvestigations[J].Tectonophysics,432:37-50.
Ivanov J,Miller R D,Lacombe P,Johnson C D,Lane J W.2006.Delineating a shallowfault zone and dipping bedrockstrata using multichannal analysis of surface waves with a land streamer[J].Geophysics,71(5):A39-A42.
Jeng Y,Chen C S,Yu H M,Jeng AS,Tang C Y,Lin MJ.2007.Ultrashallowseismic experiment on a trenched sectionof the Chelunpu fault zone,Tai wan[J].Tectonophysics,443:255-270.
Li Y G,Chester F M,Vidale J E.2001.Shallowseismic profiling of the exhumed punchbowl fault zone,Southern Cali-fornia[J].Bull Seism Soc Amer,91(6):1820-1830.
Young R A,Hoyos J.2001.Near-surface,SH-wave surveys in unconsolidated,alluvial sediments[J].The LeadingEdge,20(9):936-948.
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