GRAVITY TECTONICS AND SEISMIC GAPS IN THE MANTLE

摘要

The concept of gravity tectonics is applied to reveal the major clue as to the conditions which result in the correspondence of seismic and tectonic gaps in the mantle. An asymptotic theory is developed for the calculation of the thrust and moment when a descending lithospheric plate encounters resistance to its down¬ward motion in the mesosphere. Dynamic analysis falls into two parts: (1) de¬riving equations for forces in the descending lithosphere, (2) deducing moment distribution which causes the detachment of lithosphere. For the analysis of forces a mathematical theory of shells is given.