【摘要】 东北地区是中国境内中生界发育较完整的地区之一,其中三叠系在内蒙古二连盆地东北部发育较好,侏罗系发育较完整的剖面分布于冀北、辽西及二连盆地,下白垩统以二连盆地和辽西地区发育齐全且研究程度较高,上白垩统以松辽盆地发育最佳,研究程度最高。以东北地区中生界作为研究载体,对中生代孢粉化石群加以清理,共整理出29个孢粉化石组合。经研究认为,东北地区中生代古气候背景经历了2个超级周期、4个一级周期,以及12个二级气候变化周期。更多还原

【Abstract】 Mesozoic strata are well-developed in Northeast China.Among them,Triassic System is only found in the northeastern Errian Basin,Inner Mongolia;Jurassic System is fully developed in North Hebei,West Liaoning,and the Errian Basin;Lower Cretaceous strata are widely distributed in Northeast China,especially in the Errian Basin and West Liaoning;Upper Cretaceous strata are fully developed in the Songliao Basin.Based on sporopollen data,29 sporopollen assemblages were revised.It is revealed that the palaeoclimate changes recorded 2super-cycles,4firstlevel cycles,and 12secondly-level cycles in the Mesozoic of Northeast China.更多还原