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本文研究黑龙江北安地区下白垩统 2个岩石单位中的孢粉组合。其中营城组孢粉组合是松辽盆地北部营城组孢粉化石类型最丰富的组合 ,时代属巴列姆期或巴列姆 -阿普第期 ;沙河子组下段孢粉类型相对较少 ,组合时代暂定为早白垩世早期 (可能相当贝里阿斯 -戈特列夫期 )。沙河子组下段为温暖潮湿的亚热带气候。营城组沉积时期在温暖湿润的亚热带气候下 ,南方的干旱气候对北安地区也有一定的影响。
In this paper, the sporopollen assemblage in the two Lower Cretaceous rocks in Bei’an, Heilongjiang Province is studied. Among them, the sporopollen assemblage in Yingcheng Formation is the most abundant assemblage of sporo-pollen fossils in Yingcheng Formation in northern Songliao Basin, belonging to Balmain or Baltimore-Aplomian; the sporopollen in the lower part of Shahezi Formation is relatively less , The combination era is tentatively scheduled for the early Early Cretaceous (which may be quite Berrias-Gottlief period). The lower part of the Shahezi Formation is a warm and humid subtropical climate. During the sedimentation period of Yingcheng Formation, in the warm and humid subtropical climate, the arid climate in the south also had a certain influence on the Bei’an area.