摘要
对松辽盆地东南隆起区嫩江组剖面进行厘米级刻画,分析其为一套深湖相与滨浅湖交互相沉积。在滨浅湖交互相沉积段,水体频繁波动,且波动幅度大。根据颜色、岩性将嫩江组一段地层划分为34个米级旋回,Fischer图解分析将米级旋回归并为11个五级旋回和2个四级旋回。剖面中发育的介形虫灰岩、白云岩结核和火山灰层在松科1井嫩江组一段连续取心中都有响应;剖面和井的Fischer图解对比发现,第15个旋回开始到第25个旋回结束,松辽盆地沉积中心向西北方向迁移,且可能伴随着盆地东缘的抬升运动。
Described(centimeter scale) the field section of Cretaceous Nenjiang Formation(K_2n) in southeast uplift zone of Songliao Basin.There are three sedimentary subfacies including deep lake,shallow lake and coastal lake subfacies.The water level fluctuated frequently with large fluctuation amplitude.The first member of Nenjiang Formation was composed of 34 meter-scale cycles, 11 fifth-order cycles and 2 fourth-order cycles in the field section.Ostracoda limestone layer,dolomite concretion and volcanic ash layer which developed in the field section were also found in the core section of CCSD-SK-I.Comparing the Fischer plots between the field section and the core section,from the fifteenth cycle to twenty-fifth cycle,the depocenter of Songliao Basin moved from southeast to northwest corresponding to the uplift of eastern basin.
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第1期99-108,共10页
Acta Petrologica Sinica
基金
国家"973"项目(2006CB701403和2009CB219303)资助
"东北亚生物演化与环境教育部重点实验室"
吉林大学"211"工程三期建设项目
2009年教育部基本科研业务经费("吉林大学创新团队发展计划")支持
关键词
松辽盆地
东南隆起区
白垩系嫩江组一段
沉积相
旋回地层
松科1井
Songliao Basin
Southeast uplift
Cretaceous first member of Nenjiang Formation
Sedimentary facies
Cyclostratigraphy
CCSD-SK-I
