摘要
通过对勘探程度的供浩尔舒特断陷的区域地质特征、地震地质学、层序地震学和单井相分析的精细研究，利用二连盆地勘探程度较高的7个断陷现有资料和研究成果，推测了该断陷不同时期的沉积分布模式和沉积相带。该断陷在阿尔善组沉积时期为裂谷发育初期，形成了半地剪断陷，以滨浅湖相沉积为主；腾一段沉积时期为裂谷发育期，裂陷作用加强，盆地有统一的沉积中心，以较深湖相沉积为主；腾二段沉积时期为裂谷萎缩期，断裂作用起于平静，断陷进入广盆发育阶段，以滨浅湖相沉积为主，至腾二段沉积末期，湖盆沉积结束。根据该断陷沉积发育类型，认为基本上可与二连盆地的额仁淖尔、乌里亚斯太和巴音都兰进行对比。
Based on detail researches about the regional geology, sedimentation seismology, sequence seismology and single well faciesanalysis of the less explored Honghaoershude fault-depression, and using the results of the seven explored fault-depressions inErlian basin, we can forecast the depositional model and sedimentary facies of the Honghaoershude fault-depression- Thefault-depression has experienced the earIy, middle and late stages of rifting. Each stage responses to the depositional phase ofAershan Formation, Member 1 and Member 2 of Tenggeer Formation in Early Cretaceous, respectively. In the early stage,the fault-depression was a half-graben, filled predominantly with shore to shallow lake facies strata. In the middle stage, thefault-depression rapidly subsided and formed a unitary depocenter filled with deeper 1ake facies sequence- In the late stage,the rifting of the fault-depression evolved towards stable and became a wide-spread lake basin filled with shore-shallowsedimentary sequence, until the end of the depositional phase of Member 2 of Tenggeer Formation, the rift 1akes weredisappear- We can use these research results to demonstrate some typical stratigraphical and sedimentological responses torifting of the Erennuoer, Wuliyasitai and Bayindulan fault-depressions in Erlian basin.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1997年第5期33-37,共5页
Petroleum Exploration and Development
关键词
盆地
沉积特征
断陷
地震勘探
油气勘探
Erlian basin, Depositional feature, Seismic stratigraphy, (Sequence seismology), (Honghaoershude faultdepression)
