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采用弹性挠曲模型,利用球谐函数方法计算了欧亚板块均衡大地水准面异常.均衡大地水准面异常消除了地形起伏、地壳物质补偿的影响,主要反映了地幔物质密度异常以及核幔边界起伏和热状态的不均匀分布特征,而这种物质密度和热状态的不均匀分布导致了地幔物质的流动.针对滤波后的均衡大地水准面异常分别计算了欧亚板块大尺度和中尺度的地幔对流,并进行了构造和地球动力学分析.结果表明,现今欧亚板块的地壳运动与地幔对流有着密切的联系.
Using the elastic deflection model, the spherical anomalies of the equatorial Eurasian plate are calculated by the spherical harmonic method, and the anomalous geoid anomalies eliminate the influence of the topography relief and the crustal material compensation, which mainly reflect the abnormalities of the mantle material density and the ups and downs of the mantle And non-uniform distribution of thermal states, and the uneven distribution of material density and thermal state led to the flow of mantle material.According to the filtered equilibrium geoid anomalies, the mantle of large-scale and mesoscale mantle Convection and tectonic and geodynamic analysis have been carried out.The results show that the crustal movement of the Eurasian plate is closely related to mantle convection.