华北板块东部侏罗纪、白垩纪古地磁与古构造

本文从古地磁结果讨论了华北板块东部侏罗纪、白垩纪古构造位置及古板块运动的一些特点。

Paleomagnetism and Paleotectonics of North China Plate in Jurassic and Cretaceous

This paper discusses the paleotectonic locations and some characteristics of paleotectonic movements of the eastern part of North China Plate.It is suggested that the final convergence of the South China and the North China Plates has been completed through the Indo-China movement. Since then they had drifted northwards and arrived at or possibly gone beyond the presnt latitude by Cretaceous.It is believed from the analysis of paleomagnetic data concerned that the North China Plate had then bounnced back ( southwards ) during the Middle Cretaceous afer the northward driving force had diminished and finally disappeared since the early Cretaceous. A clockwise rotation was associated with the "back bouncing" , which has created a tectonic setting for the formation of a series of rifting basins in the eastern part of North China and the Songliao area. It is also deduced from abovesa-id evidences that the convergence of the North China and the Siberia Plates took place during Cretaceous, but later than that of other plates in East China.