摘要
根据地层的抬升剥蚀（或沉降沉积）与古地温降低（或升高）之间的关系，通过磷灰石裂变径迹热史模拟的方法和其他地质资料，精确地确定了松辽盆地新生代的不整合和依安组、大安组、泰康组等地层沉积开始和结束的时间。松辽盆地新生代存在3次抬升和3次沉降：65．50～53．49Ma盆地降温、抬升，产生依安组和白垩系地层之间的不整合面；53．49～40．31Ma盆地升温、沉降，依安组沉积；40．31～36．18Ma盆地降温、抬升剥蚀，产生大安组和依安组之间的不整合面；36．18～5．83Ma盆地升温、持续沉降，大安组沉积；5．83～1．79Ma盆地降温、抬升剥蚀，产生泰康组与大安组之间的不整合面；1．79～？Ma盆地沉降，泰康组沉积。确定了依安组是始新统早、中期的地层，起止年龄为53．49～40．31Ma；大安组是始新统末期一中新统的地层，起止年龄为36．18～5．83Ma；泰康组是更新统的地层，开始年龄为1．79Ma。
Based on the relationship of paleotemperat unconformity revealed accur ure ,and the therma and sedimentation 1 history stratum uplifting（or sedimentat simulation of apatite fission trac of Songliao Basin was confirmed here. n） and rising （or falling） of beginning time of Cenozoic Thermal history was also ately, that there are three episodes of alternative uplifting and subsidence： falling tempera ture with basin uplifting during 65.50--53.49 Ma, rising temperature with basin sedimentation during 53.49--40.31 Ma~ second falling temperature with uplifting and denudation during 40.31-- 36.18 Ma, second rising temperature with successive sedimentation during 36.18--5.83 Ma, third falling tempera- ture with uplifting and denudation during 5.83--1.79 Ma, and last sedimentation during 1.79- ？ Ma. Result shows that Yi＇an Formation is the early-mid part of Eocene with the age of 53.49--40.31 Ma, Daan Formation belongs to the terminal of Eocene and Miocene from 36.18 Ma to 5.83 Ma,and Taikang Formation is a stratum of Pleistocene with the beginning age of 1.79 Ma.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2007年第5期923-928,共6页
Journal of Jilin University：Earth Science Edition
基金
国家油气专项(XQ-2004-07-03-03)
吉林大学青年教师基金项目(420010302355)
