摘要
本文从地幔是牛顿粘滞层状流体出发,根据流体动力学推导出重力扰动位和岩石圈底面地幔流应力场的基本关系;利用地球重力场模型资料将重力扰动位两个水平导数T_z、T_y,向下延拓到岩石圈底面处,从而得到岩石圈底面地幔流应力计算新模式。
According to hydrodynamics the writers deduce the basic equation of the relationship between the gravity disturbing potential and the stress field of the mantle current under the lithosphere from the hypothesis about
the Laminar Viscous Newtonian fluid in this paper. This equation is as follows:σN = 4pppG/gTx, ,σE = 4pppG/gTy,. Using
the data of the earth's gravity field model, they extended and developed the two horizontal derivatives of the gravity disturbing potential, Tx, Ty downwards to the bottom surface of the lithosphere. Then, the new pattern for calculating the stress of mantle current under the lithosphere was derived.
Key words Lithosphere, mantle current, stress, gravity disturbing potential, gravity field model, downward extension, continuation factor
