| 华北东部地区地壳泊松比异常及其成因 |
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| 引用本文： | 杨文采,瞿辰,于常青. 华北东部地区地壳泊松比异常及其成因[J]. 地学前缘, 2011, 18(3): 13-21 |
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| 作者姓名： | 杨文采 瞿辰 于常青 |
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| 作者单位： | 中国地质科学院地质研究所国土资源部大陆动力学重点实验室,北京,100037 |
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| 基金项目： | 国家科技专项“汶川地震断裂带科学钻探”(笫15课题); 中国地质科学院地质研究所所长基金项目(J0815) |
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| 摘 要： | 利用地震层析成像方法可以提供地壳上地幔P波和S波速度扰动精细图像,进一步换算还可以得到泊松比的图像.但是,与P波和S波速度扰动图像相比,泊松比成像是否具有独特优点还有待研究.通过对华北东部进行了高分辨率地震层析成像研究,作出了该地区地壳速度结构和泊松比的图像,揭示了该区域存在一个高泊松比异常区,位于恒山-北太行-张家口...
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| 关 键 词： | 地震层析成像 中国华北 克拉通地壳 泊松比异常 岩浆底侵作用 |
High Poisson's ratio anomalies in the crust of the eastern part of North China and its origin |
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| Yang Wencai,Qu Chen,Yu Changqing. High Poisson's ratio anomalies in the crust of the eastern part of North China and its origin[J]. Earth Science Frontiers, 2011, 18(3): 13-21 |
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| Authors: | Yang Wencai Qu Chen Yu Changqing |
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| Affiliation: | Yang Wencai,Qu Chen,Yu ChangqingKey Laboratory of Continental Dynamics of the Ministry of Land and Resources,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China |
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| Abstract: | The seismic tomography can provide both fine P-wave and S-wave velocity structures of the crust and upper mantle,and also a Poisson's ratio image from the seismic velocities via proper computation.However,it is unsure that Poisson's ratio images have any advantages comparing with the P-wave and S-wave velocity images.In this study,the high resolution seismic tomography is applied to the determination of detailed 3-D crustal P-and S-wave seismic velocities structure as well as Poisson's ratio images under th... |
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| Keywords: | seismic tomography North China craton crust Poisson's ratio anomaly magma underplating |
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