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华北岩石圈减薄和克拉通破坏是近年来国内外研究的热门课题,虽然已基本确定克拉通破坏发生的峰期为晚中生代,但发生的起始时间以及早中生代大陆深俯冲作用是否对克拉通造成一定的破坏等问题却研究甚少.通过总结华北东部三叠纪侵入岩的时空分布规律和地球化学特征,探讨它们的岩浆源区及成岩过程,反演它们形成的深部地球动力学机制,从而提出华北克拉通破坏的起始时间可能为晚三叠世,与大陆深俯冲及陆陆碰撞造山作用所引起的地壳加厚、拆沉作用有关,这一作用也可能是晚中生代克拉通破坏的诱因.
The thinning of the lithosphere and the destruction of cratons in North China are hot topics both at home and abroad in recent years. Although the peak of the craton destruction has been basically confirmed as the late Mesozoic, the onset time and the deep subduction of the Mesozoic continent in recent years are not significant for the carat But little research has been done on the formation of certain damage.According to the spatial and temporal distribution and geochemical characteristics of the Triassic intrusive rocks in the eastern part of North China and their magmatic source areas and diagenetic processes, the deep geodynamic mechanism , Suggesting that the onset of North China craton may be Late Triassic, which may be related to the crustal thickening and delamination caused by deep subduction and continental orogenic collision orogeny in the mainland. This effect may also be due to late Mesozoic craton Destructive incentives.