## Mechanics Problems in Geodynamics, Part 1Geodynamics concerns with the dynamics of the global motion of the earth, of the motion in the earth's interior and its interaction with surface features, together with the mechanical processes in the deformation and rupture of geological structures. Its final object is to determine the driving mechanism of these motions which is highly interdisciplinary. In preparing the basic geological, geophysical data required for a comprehensive mechanical analysis, there are also many mechanical problems involved, which means the problem is coupled in a complicated manner with geophysics, rock mechanics, seismology, structural geology etc. This topical issue is Part I of the Proceedings of an IUTAM / IASPEI Symposium on Mechanics Problems in Geodynamics held in Beijing, September 1994. It addresses different aspects of mechanics problems in geodynamics involving tectonic analyses, lithospheric structures, rheology and the fracture of earth media, mantle flow, either globally or regionally, and either by forward or inverse analyses or numerical simulation. |

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### Contents

403 | |

A Review on the Lithospheric Structures in the Tibetan Plateau | 425 |

Free Oscillations of a Laterally Heterogeneous and Anelastic Earth | 444 |

The Earths Palaeorotation Postglacial Rebound and Lower Mantle Wiscos | 459 |

A Preliminary Study of the Effects of Some Flow Parameters in | 486 |

On the Rifting Dynamics of Plate Divergence and Magma Accumulation | 505 |

Coupling of Tectonic Loading and Earthquake Fault Slips at Subduction | 537 |

Oblique Subduction of a Newtonian Fluid Slab Z K Shen | 561 |

Rheological Information from Geological Structures P J Hudleston and L | 605 |

The Effect of Faultbend Folding on Seismic Velocity in the Marginal Ridge | 636 |

Analysis of Induced Seismicity for Stress Field Determination and Pore | 677 |

The LoadUnload Response | 701 |

An Earthquake Instability Model Based on Faults Containing High Fluid | 717 |

Slipweakening Constitutive Relation and the Structure in the Vicinity of | 746 |

In Situ Stress State in Mainland China F Li | 774 |

On the Dynamics of Extensional Basin R s Zeng C y Wang and D | 578 |

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Acta Geophys analysis aseismic asperities asthenosphere Beijing boundary Bull calculated California center frequency China Chinese coda QT coefficient compression coseismic creep crustal deformation depth displacement Ditto dynamic Earth Earth Planet echelon fractures effects elastic equation extensional basins fault zone finite-element fluid pressure focal mechanisms Former Liang friction Geodynamics Geol geological Geophysics horizontal HTPF HUDLESTON injection inversion laterally heterogeneous layer lithosphere lower crust magnitude Mantle Convection nonlinear normal fault numerical obliquity observed occur parameters PELTIER plane plate motion Plate Tectonics poloidal pore pressure porphyroclast principal stress rheology rock rotation rupture San Andreas fault seismic Seismol shear stress shown in Figure simulations Sinica slab pull spherical strain accumulation strength strike-slip subcrack subduction zones surface Tangshan Tangshan earthquake tectonic loading thermal Tibetan Plateau toroidal toroidal energy upper mantle values variation vertical viscoelastic viscosity WANG Xingtai ZENG ZHANG