【摘要】 基于地洼学说中地幔蠕动及能量聚散的基本理论,针对上地幔软流层中部分熔融岩浆与残余岩石介质竖向迁移与分离的地质背景,建立其流变动力学模型方程,并进行了无量纲化处理;就无量纲模型进行了分析讨论,得到一组简化的表达式。分析结果表明,残余固体岩石介质的变形行为对于部分熔融迁移只是在一定的影响区域内有作用;在此区域内,需采用修正的Darcy定律来描述其迁移动力学行为,超过这个影响区,完全可以忽略不计,此时若采用经典的Darcy定律来描述部分熔融的迁移行为,是具有足够精确的。该结论从机制上给出了部分熔融岩浆迁移与岩石变形的动力学分析,对于进一步探索岩石蠕动及成岩成矿动力学过程具有积极作用。更多还原

【Abstract】 Some simplified models are studied and discussed about the vertical movement and segregation of asthenosphere rock and the residue of partially molten magma under the guidance of the hypothesis of creep flow of mantle and alternation of thermal energy concentration-diffusion,which belongs to the activation tectonics theory(the DIWA theory).Firstly,some assumptions are made to get a kind of simplified dynamical formula according to the basic principles of rheology in a porous medium.Secondly,the formulae are nondimensionalized by introducing some parameters;and the dimensionless models are studied and discussed in detail.Then according to the results of the models,it is only in some regions that the deformation of the rock media could affect the transportation of partially molten magma,in which the dynamical characteristics of models should be adopted by modified Darcy′s law,and beyond which the results of the transportation using classical Darcy′s law are accurate.All these conclusions show why the metallogenetic mass could move upward from the asthenosphere to the earth’s surface,which is corresponding to the geology background,and magma transport might be of importance for the further research of rock creep and the dynamics of ore-forming processes.更多还原