摘要
本文用粘性牛顿流体有限元数值方法模拟郯庐断裂带主要构造演化阶段的应力场、形变场和运动速率，探讨各构造期的动力来源、边界力的作用方式及岩石物性的影响作用。旨在进一步说明郯庐断裂带多期、多次和性质各异的构造活动与华北陆块、下扬子陆块、西太平洋板块、菲律宾板块等构造单元的运动密切相关。除了东亚大陆周边板块运动造成的推力，与此相伴的地热异常也是构成郯庐断裂带各期应力场，特别是拉张期应力场特征的重要动力条件之一。
n this paper a numerical modeling of the stress and strain fields as well as the displacement rates of the Tanlu fault zone in the principal periods of its tectonic evolution is made using the Finit Element Method for a Newtonian liquid. The causative dynamic origin,the boundary forces and the effect of rock properties on the stress fields are discussed and analysed.This is aimed at further explaining that the repeated tectonic activity of the zone in its evolution is closely related to the motion of the North China platform.Lower Yangtze massif,the Pasific plate and the Philippine plate. Meanwhile,the geothermal anomaly accompaning the tectonic movement may also constitute one of the important dynamic factors to form the respective stress field,especially the tensile one of the fault zone.
出处
《地质力学学报》
CSCD
1996年第2期66-74,共9页
Journal of Geomechanics
