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Crustal Tectonic Evolution of Tanlu Fault Zone (Southern Segment) and Adjacent Areas under the Background of Extension:Evidences from Teleseismic Receiver Function
Chen Hao, Li Hongxing, Hong Dequan, Han Rubing, Wang Xiangteng, Deng Juzhi, Li Guang, Gong Meng, Huang Guangnan, Sheng Shuzhong
PDF(3351 KB)
PDF(3351 KB)
Crustal Tectonic Evolution of Tanlu Fault Zone (Southern Segment) and Adjacent Areas under the Background of Extension:Evidences from Teleseismic Receiver Function
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For the more thorough understanding of the crustal structure and evolution of Tanlu fault under extension background since early Cretaceous，we completed a study about crustal thickness and Poisson's ratio of Tanlu fault zone (southern segment) and adjacent Areas by P-wave receiver function. The results of H-κ showed the Lower Yangtze block’s crust is relatively thinner and more severe deformation than the North China block’s in study area. The average Poisson's ratio beneath Tanlu fault zone exhibited lower value feature. The result of migration revealed a crustal thinning deformation beneath the Tanlu fault zone, and a significant differences on thinning dip angle of Moho toward the Tanlu fault zone on both sides of the fault zone. Furthermore, The model of Asymmetrical extension could well explain the crustal evolution of southern segment of the Tanlu fault zone and its adjacent regions under extension background since early Cretaceous.
receiver function / crustal deformation / Tanlu fault zone / Cretaceous continental extension / structural geology
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本次研究所使用程序为圣路易斯大学朱露培教授与中国科学院地质与地球物理研究所陈凌教授的hk和PSDM程序.感谢安徽省地震局提供研究数据.同时感谢崇美艺术工作室邵思文女士为本文制作精美模型图件.感谢审稿专家为本文提出的宝贵意见.
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