摘要
在综合分析华北东部深部构造、盆地构造及其动力学特征等资料的基础上,运用离心技术讨论了该区盆地形成机制与上地幔运动的关系。这种离心技术采用物质密度差代替温度差是一种新的实验方法。 实验结果表明,上地幔对流、上地幔隆起(或底辟)以及重力均衡作用产生了华北地壳的单向引张力,从而导致箕状盆地的形成。 作者认为,华北东部地区盆地形成和发展的动力源与上地幔的运动和重力作用密切相关。
Based on comprehensives analysis of deep structure, formation of Cenozoic basin and its dynamical characteristics, the formation mechanism of the basin and its relation to movement of the upper mantle in the eastern part of North China are discussed in this paper. The experimental study have been carried out using the centrifugal technique, in which the differential density of material is adopted instead of differential temperature.The experimental result shows that the upper mantle convection, the upheaval and diapirism and the gravity isostasy produce a monodirectional tensile force for the movement of the continental crust in North China. The tensile force represents a main mechanism for formation of dustpan-shaped basin.The authors suggest that the driving force for formation and development of the eastern North China basin is closely related to gravitational effect and movement of the upper mantle.
出处
《地震地质》
EI
CSCD
北大核心
1991年第3期276-282,共7页
Seismology and Geology
基金
地震科学联合基金
关键词
上地幔
对流
底辟
盆地构造
华北
North China, Upper mantle, Convection, Diapirism, Basin
