胶莱盆地莱阳期古构造应力场分析及模拟The paleotectonic stress field at Laiyang Stage in Jiaolai Basin and the simulation
佟彦明
TONG Yan-ming (Resources Institute
摘要(Abstract)：
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。
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.
关键词(KeyWords)：
胶莱盆地;莱阳期;构造应力场;有限元法;数值模拟
Jiaolai Basin;Laiyang Stage;tectonic stress field;finite element;simulation
基金项目(Foundation): “十五”国家重大科技攻关项目(2004B616A-06-01);; 中石化胜利油田有限公司项目“胶莱盆地原型恢复与构造地热演化分析”资助
作者(Author):
佟彦明
TONG Yan-ming (Resources Institute
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