【摘要】 根据前人的研究成果 ,对中国东部晚侏罗早白垩纪 (J3 K1)盆地火山岩的化学成分等特征进行了研究 ,确认出中国东部晚侏罗早白垩纪 (J3 K1)盆地火山岩系是橄榄安粗岩系 ,且与其东部的火山岩系组成单极性系列。这是中生代滨太平洋板块俯冲并挤压中国大陆板块的结果 ,进而控制的盆地 (J3 K1)是在受总体挤压背景下形成的。更多还原

【Abstract】 The chemistry of volcanic rock of the late Jurassic and early Cretaceous periods(J\-3\|K\-1) in the eastern China is analyzed on the basis of precious data. The volcanic rock of these periods is determined to be the shoshonite series. They possess the same characteristics with the volcanic rocks in Bohai Bay, Songliao and Yangtze areas. The volcanic rocks series is of single polarity characterized by subduction orogeny. The formation of the shoshonite series is resulted from the combining action of two tectonic dynamic systems under the dominantly compressive stress field, which controlled the basin of later Jurassic and Cretaceous periods.更多还原