摘要
华北中生代克拉通破坏是现今地学界研究的前沿热点,然而却依然存在着诸多问题未解决,本文对现今关于华北地台中生代地壳减薄、克拉通破坏的证据、幅度、时间、成因机制等进行了总结,对各种模型存在的问题浅要分析。在国内外发表的相关资料基础上,探讨了中生代华北地台地壳减薄的机制,提出地球深部的动力学效应与浅部的表现存在时空上的耦合效应,同样华北地台地壳减薄与中生代其岩浆、成矿大爆发亦是相互耦合的,寻求减薄的成因机制将有助于了解地球深部的动力效应,并为成矿理论和找矿方法的突破提供新的思路;华北地区岩石圈的减薄应该是拆沉作用、机械—化学侵蚀作用、地幔柱三者相互作用的结果;并将华北岩石圈减薄的时空分布划分为酝酿期—高峰期—衰弱期—寂灭期四个时期;文章末就将来研究的方向提供了一点建议和展望。
The destruction of Mesozoic north China craton is one of the leading edge of Chinese geologists now, but there still exist a lot of problems unresolved. In this paper, we summarize the main ideas on these aspects, what include the thining crust of the Mesozoic north China platform, the evidence of craton destruction, and its extent, time, genetic mechanism, in the eurrent research, and analysis the problems of the various models. Based on the related data published in home and abroad, we probe into the mechanism that the thining crust of the Mesozoic north China platform, and put forward that the dynamics effect in deep earth is spatial and temporal coupling with the appearance on shallow surface. With the same reason, the thining erust of the Mesozoic north China platform is coupling with the Mesozoic outbreak of lava, mineralization. Seeking the genetic mechanism of the thining crust will help to understand the dynamics effect in deep earth, and provide some new ideas to the breakthrough of the metallogeny theory and prospeeting method. The thining crust of north China should be the result of the interaction of the three that the delamination, the mechanieal-ehemical erosion, and mantle plume. And according to the time ,and space distribution of the thining crust of the Mesozoic north China platform, we can divide the evolution into four periods： the Gestation period, the Peak period, the Debilitating period, and the Perish period. At the end of the paper, we provide some suggestion and prospeetes about the direction of the research in the future.
出处
《中山大学研究生学刊（自然科学与医学版）》
2012年第2期30-41,共12页
Journal of the Graduates Sun YAT-SEN University(Natural Sciences.Medicine)
关键词
华北克拉通破坏
中生代
减薄
时空耦合
成矿大爆发
The destruction of north China craton
Mesozoic
Thining
Temporal coupling
Mineralization
