松辽盆地白垩纪地层序列与年代地层

利用裂变径迹法和Ｋ－Ａｒ翻译法对松辽盆地白垩纪年代地层进行了研究。结果表明，泉头组及其以上地层的实测年龄与生物地层、磁性地层所推断的各组的地质年龄基本一致，上、下白垩统的界线应划在青山口组和泉头组之间；而泉头组以下地层，实测年龄与生物地层、磁性地层所推断的年龄值有较大的偏差（认为火石岭组应为早白垩世最早期沉积），并据此对下白垩统各组的地质时代归属提出了新的见解。

STRATIGRAPHIC SUCCESSION AND CHRONOSRATA OF CRETACEOUS IN SONGLIAO BASIN

This paper studies the chronostrata of Cretaceous in Songliao Basin using fission track method and K-Ar dilution method, The result is that the actual measured age of the strata in Quantou Member and above confirms to that inferred by biostrata and magnetic strata. The boundary line of upper and lower Cretaceous should be delineate between Qingshankou and Quantou members. The actual measured age of the strata below Quantou Member deviates from that inferred by biostrata and magnetic strata (Huoshiling Member is considered as the oldest sedimentation of Early Cretaceous). A new point of view about the geologic time of various members in Lower Cretaceous.