【摘要】 盆地古构造应力场分析一直是盆地动力学研究的一个难题。从胶莱盆地莱阳组的同沉积构造活动研究入手,通过盆内不同方向的平衡剖面所反映的伸展量来认识盆地在莱阳期的应变特征和构造应力场状况。然后建立相应的地质模型,通过基于ANSYS系统的有限单元法平面线弹性模拟加以检验,最后确定了胶莱盆地在莱阳期的动力学机制。分析结果表明,胶莱盆地在莱阳期受控于双轴拉张应力场的作用,这可能与更大规模的区域性裂陷作用有关。更多还原

【Abstract】 The analysis of the paleotectonic stress field is always a difficult problem in basin dynamic research.This paper starts with the researches on syndepositional tectonism of Laiyang Stage in Jiaolai Basin,and the strain characteristics and status of tectonic stress field of Laiyang Stage are obtained from the extension amount analyses of balanced cross sections in different directions.Then the corresponding geologic model is built to verify the rationality of the geologic result by planar linear elastic finite element simulation based on ANSYS system.The dynamic mechanism of Jiaolai Basin at Laiyang Stage is established at last.The result indicated that Jiaolai Basin is under the control of bidirectional extensional stress field at Laiyang Stage,and this might be caused by larger scale regional extension.更多还原