浙江省台州-昌化深部构造特征探测
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摘要
采用高分辨折射和宽角反射/折射综合地震探测方法,在浙江省中部沿黄岩、临海、东阳、桐庐、昌化进行深部构造探测,获得一条长约350km的速度结构剖面。探测结果表明,地壳结构具有明显的多层性,存在3个速度间断面;基底速度结构图像揭示了速度结构的横向非均匀性,这种不均匀性既对应于地质构造单元的分界线或断裂构造带,也反映出东西部构造特征的差异性。
Using high resolution refraction and wide-angle reflection/refraction integrated seismic detection method,deep structural exploration is carried out at Huangyan,Linhai,Dongyang,Tonglu and Changhua in the central part of Zhejiang province.A velocity structure section with a length of about 350 km is obtained.The results show that the crustal structure has obvious multi layers,with three velocity discontinuities,and the velocity structure image reveals the heterogeneity of velocity structure in the basal lateral.This heterogeneity corresponds to the tectonic unit in the boundary or fracture tectonic belt,and also reflects the differences between east and west tectonic characteristics.
Using high resolution refraction and wide-angle reflection/refraction integrated seismic detection method,deep structural exploration is carried out at Huangyan,Linhai,Dongyang,Tonglu and Changhua in the central part of Zhejiang province.A velocity structure section with a length of about 350 km is obtained.The results show that the crustal structure has obvious multi layers,with three velocity discontinuities,and the velocity structure image reveals the heterogeneity of velocity structure in the basal lateral.This heterogeneity corresponds to the tectonic unit in the boundary or fracture tectonic belt,and also reflects the differences between east and west tectonic characteristics.
引文
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[10]浙江省工程地震研究所.浙江省地震构造图及说明书[Z].2009(Zhejiang Institute of Engineering Seismology.Zhejiang Seismic Structure Map and Instructions[Z].2009)
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[14]竺国强,姜继双,陈梓军,等.浙西北江山-绍兴断裂带构造演化特征[J].浙江地质,1997,13(2):6-10(Zhu Guoqiang,Jiang Jishuang,Chen Zijun,et al.Tectonic Evolution Characteristics of Jiangshan-Shaoxing Fault in Northwestern Zhejiang Province[J].Zhejiang Geology,1997,13(2):6-10)
[2]董树文,李延栋.SinoProbe——中国深部探测试验[J].地质学报,2009,83(7):895-909(Dong Shuwen,Li Yandong.SinoProbe:The Exploration of the Deep Interior beneath the Chinese Continet[J].Acta Geologica Sinica,2009,83(7):895-909)
[3]董树文,李延栋,高锐,等.地球深部探测国际发展与我国现状综述[J].地质学报,2010,84(6):743-770(Dong Shuwen,Li Yandong,Gao Rui,et al.International Progress in Probing the Earth’s Lithosphere and Deep Interior:A Review[J].Acta Geologica Sinica,2010,84(6):743-770)
[4]刘刚,董树文,陈宣华,等.EarthScope-美国地球探测计划及最新进展[J].地质学报,2010,64(6):909-926(Liu Gang,Dong Shuwen,Chen Xuanhua,et al.Earth Scopethe Latest Advances of the United State’s Deep Exploration Program[J].Acta Geologica Sinica,2010,64(6):909-926)
[5]贺日政,高锐,郑洪伟,等.地震波速层析成像方法研究进展[J].地质学报,2010,84(6):840-846(He Rizheng,Gao rui,Zheng Hongwei,et al.Progress in Seismic Tomography[J].Acta Geologica Sinica,2010,84(6):840-846)
[6]方盛明,张先康,刘保金,等.城市活断层地震勘探的最佳组合方法与应用研究[J].地震地质,2006,28(4):646-654(Fang Shengming,Zhang Xiankang,Liu Baojin,et al.The Best Combination Methods and Applied Research of Seismic Prospecting for Active Faults in Urban Area[J].Seismology and Geology,2006,28(4):646-654)
[7]刘福田,徐佩芬,刘劲松,等.大陆深俯冲带的地壳速度结构——东大别造山带深地震宽角反射/折射研究[J].地球物理学报,2003,46(3):366-372(Liu Futian,Xu Peifen,Liu Jinsong,et al.The Crustal Velocity Structure of the Continental Deep Subduction Belt:Study on the Eastern Dabie Orogen by Seismic Wide-Angle Reflection/Refraction[J].Chinese Journal of Geophysics,2003,46(3):366-372)
[8]张先康,嘉世旭,赵金仁,等.西秦岭-东昆仑及邻近地区地壳结构——深地震宽角反射/折射剖面结果[J].地球物理学报,2008,51(2):439-450(Zhang Xiankang,Jia Shixu,Zhao Jinren,et al.Crustal Structures beneath West Qinling-East Kunlun Orogen and Its Adjacent Area-Results of Wide Angle Seismic Reflection and Refraction Experiment[J].Chinese Journal of Geophysics,2008,51(2):439-450)
[9]浙江省地质矿产局.浙江省区域地质志[M].北京:地质出版社,1988(Bureau of Geology and Mineral Resources of Zhejiang.Regional Geological Records of Zhejiang Province[M].Beijing:Geological Publishing House,1998)
[10]浙江省工程地震研究所.浙江省地震构造图及说明书[Z].2009(Zhejiang Institute of Engineering Seismology.Zhejiang Seismic Structure Map and Instructions[Z].2009)
[11]Hole J A.Nonlinear High-Resolution Three-Dimensional Seismic Travel Time Tomography[J].Journal of Geophysical Research:Solid Earth,1992,97(B5):6 553-6 562
[12]张先康.延庆-怀来地区地壳细结构——利用深地震反射剖面[J].地球物理学报,1996,39(3):356-364(Zhang Xiankang.Fine Structure of Crust in Yanqing-Huailai Area-by Deep Seismic Reflection Profile[J].Chinese Journal of Geophysics,1996,39(3):356-364)
[13]竺国强,张福祥.江山-绍兴碰撞带构造演化与变形特征[J].浙江大学学报:自然科学版,1997,31(6):745-752(Zhu Guoqiang,Zhang Fuxiang.Tectonic Evolution and Deformation Characteristics of Jiangshan Shaoxing Collision Zone[J].Journal of Zhejiang University:Natural Science Edition,1997,31(6):745-752)
[14]竺国强,姜继双,陈梓军,等.浙西北江山-绍兴断裂带构造演化特征[J].浙江地质,1997,13(2):6-10(Zhu Guoqiang,Jiang Jishuang,Chen Zijun,et al.Tectonic Evolution Characteristics of Jiangshan-Shaoxing Fault in Northwestern Zhejiang Province[J].Zhejiang Geology,1997,13(2):6-10)
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