摘要
在分析现有华北克拉通构造活化动力学机制研究成果和资料的基础上,简要讨论了两类可导致华北克拉通减薄的动力学机制:"热侵蚀"减薄机制和"拆沉"减薄机制。指出了与这两类动力学机制所相应的科学理论,即Rayleigh-Benard非稳定性理论和Rayleigh-Taylor非稳定性理论。考虑到这两类科学理论的局限性,建议采用孔隙波在大陆岩石圈内传质传热模型描述华北克拉通构造活化动力学机制的量变过程(即能量积累过程),同时进一步完善和修正现有的Rayleigh-Benard非稳定性理论和Rayleigh-Taylor非稳定性理论,为实现在空间和时间上定量化重现华北克拉通构造活化动力学过程的数值仿真创造必要的条件。
Based on the existing results and data from the study of dynamic reactivation mechanisms in North China Craton, two kinds of lithospheric thinning mechanisms, namely the thermal erosion mechanism and the delamination mechanism, are briefly discussed in this paper. These two mechanisms are closely based on the following two scientific theories： the Rayleigh-Benard instability theory and the Rayleigh-Taylor instability theory. Due to the limitations of these two theories, the porosity-wave induced heat-transfer and mass-transport model needs to be used to investigate the energy accumulation process associated with the dynamic mechanism of North China Craton destruction. With the further modification of the existing Rayleigh-Benard instability theory and Rayleigh-Taylor instability theory, it is possible to create necessary conditions for reproducing the dynamic reactivation process of North China Craton through numerical simulations.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2008年第2期133-142,共10页
Geotectonica et Metallogenia
基金
国家自然科学基金项目(NSFC-40773004)
中国科学院边缘海地质重点实验室课题(MSGL07-23)资助.
关键词
构造活化
动力学机制与模型
岩石圈减薄
华北克拉通
Tectonic reactivation
dynamic mechanism and model
lithospheric thinning
North China Craton
