| 地球质心偏移与各圈层形变 |
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| 引用本文： | 杨学祥,王莉.地球质心偏移与各圈层形变[J].大地测量与地球动力学,1995(4). |
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| 作者姓名： | 杨学祥 王莉 |
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| 作者单位： | 长春地质学院，吉林省地矿局教育培训中心 |
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| 摘 要： | 地幔结构的地震层析图象显示热心南偏和质心北偏可能是地球南北反对称的动力基础。建立了南北半球密度反对称分布的数学模型，计算结果表明：地壳地幔南北半球的密度不均匀分布可使地核偏离地球质心１～３公里，完全符合张焕志１９８２年的计算结果。质心偏移将造成地球各圈层相同数量级的等位移动与等位变形，从而产生大幅度的全球海平面变化和地壳形变。
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| 关 键 词： | 地球形状，地球内部，均衡状态，形变，质心偏移 |
DEVIATION OF THE EARTH MASS CENTER AND LAYER-SPHERE DEFORMATION |
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| Yang Xuexiang.DEVIATION OF THE EARTH MASS CENTER AND LAYER-SPHERE DEFORMATION[J].Journal of Geodesy and Geodynamics,1995(4). |
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| Authors: | Yang Xuexiang |
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| Abstract: | The antisymmetry of the north half to the south half of the Earth may be attributed to southward deviation of the thermal center and northward deviation of the mass center within the mantle demonstrated by seismic tomography. This paper sets up a mathematical model of density distribution for the antisymmetry of the north-south. The results of computation indicate that the inhomogeneous density distribution in the north and south makes the core off the Earth's center 1 km or 3. It is in full agreement with the results computed by Zhang Huanzhi(1982).The sea level will change more and the crust will deform more after the potential surface changing . |
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| Keywords: | Earth' s shape Earth interior isostatic status deformation deviation of the Earth's mass center |
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