从柯石英和“大陆深俯冲”到全球构造运动原动力的思考

From Coesite,Continental Deep Subduction to the Driving Force of Global Tectonic Movement

大陆深俯冲与快速折返假说提出20年来一直存在争论。大陆深俯冲中需要地幔对流拖拽,但存在大陆根的事实和30亿年中在上地幔固定深度缓慢生长的大颗粒金刚石实物证据,表明地幔并未发生大规模对流。目前大地构造学的主流理论本质上是"热机类理论",地幔热对流是这部热机的驱动原动力。对地幔对流的质疑表明,摆脱"热机类理论"的束缚,开展以地球自转为根本能源和动力的"转动机类理论"的探讨,将从驱动原动力上为大地构造学研究开辟道路。笔者认为:根据能量守恒定律,潮汐作用是转动机类理论中地球转动能转化为构造运动的原动力。全球构造运动是潮汐引起壳幔层圈间相互作用的结果。

The hypothesis of continental deep subduction and rapid exhumation has been of much controversy,since it was put forward two decades ago.It is known that the continental deep subduction needs mantle convection to drag,but the fact of observed continental roots and the physical evidence of slow growth of large diamond particles at fixed depth during three billion years in the upper mantle suggest no occurrence of a large-scale mantle convection.The mainstream current tectonic theory is essentially a heat engine theory,which explains that the driving force of the heat engine is the mantle convection.So,it is necessary now to get rid of this theory framework and take up the rotating machine theory as a guide to approach to the geotectonics.According to the law of conservation of energy,the author holds that tidal action may serve as the driving force,which can transform the earth rotation energy into the tectonic motions on the basis of the rotating machine theory.The global tectonic movement is the response to tidal-induced crust—mantle interaction.