摘要
中生代华北克拉通破坏是目前引人关注的研究课题。鉴于目前一些文章在表达克拉通状态时引用的地质图件不准确,忽略了华北克拉通从古至今的不同阶段的演化,不能正确的表达克拉通在破坏之前或之后的状态,本文强调华北克拉通破坏前的状态是研究的重要基础。华北克拉通是经历过多期克拉通化形成的。
In recent years, the extent and cause of Mesozoic lithospheric disruption beneath the NCC have been discussed extensively. However, some geological sketch maps in the published papers showing the state of lithosphere beneath the North China Craton （NCC） before the Mesozoic lithospheric disruption are not reasonable, which ignore multi-stage tectonic evolution process of the North China Craton. Author, here, would like emphasize following points： （1） The NCC is one of the oldest cratons in the world, which has complicated tectonic history with 3.8Ga continental rocks. （2） The NCC experienced multi-stage cratonization. It fundamentally formed at the end of Archean, and ultimately completed cratonization at Paleoproterozoic of 1.9 - 1.85Ga. （3） The NCC came upon the stage of platform regime since 1.8Ga, marked by Proterozoic continental rift and Phanerozoic sedimentary basin within craton. （4）A Mesozoic tectonic inversion occurred in eastern North China with a large-scale lithospheric thinning beneath the sub-continent. Therefore, the state of the NCC before the disruption is a multi-stage evolving lithosphere, other than a 2.5Ga eraton or a 1.9 - 1.8SEa craton.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2008年第4期516-520,共5页
Geotectonica et Metallogenia
基金
国家自然科学基金(项目号:40672128
90714003和40721062)资助
关键词
华北
克拉通
破坏前的状态
North China Craton
lithosphere state
before Mesozoic disruption
a suggestion
