摘要
基于平衡剖面的基本原理,借鉴张性地区平衡剖面恢复的方法和经验,对临清坳陷东部5条主要测线进行了恢复,并分析了各构造阶段的盆地演化特征。研究结果表明:在早—中三叠世,盆地不存在挤压与拉张,为稳定内陆坳陷发育阶段;在晚三叠世,盆地整体抬升并遭受剥蚀,应力场表现为北东—南西向挤压;在侏罗纪—早白垩世,区内进入张性伸展发育阶段,研究区表现为受兰聊大断层控制的北东向大型初始裂陷盆地;在晚白垩世,盆地性质由拉张转变为挤压,整体缺失上白垩统,中生界剥蚀厚度约为400m;在古近纪,研究区进入大规模断陷盆地发育阶段,应力场优势拉张方向为北西—南东向;在新近纪—第四纪,研究区进入整体拗陷阶段,表现为轻微拉张性质,盆地演化趋于稳定。
Based on the theory of the balanced cross section and referred to the experience and the method of the balanced cross section res-toration of extension area.five seismic profiles were balanced and restored.and the basin analysis was launched.The result of the study shows that the basin did not undergo compression and extension and it was at a stage of stable inland depression in the Ear-ly and Middle Triassic.In the Late Triassic the basin was uplifted and suffered erosion.The stress field was characterized by the XE-SW extrusion.From Jurassic to the Early Cretaceous the basin entered an extended stage and the work area was a NE-tren-ding large initial basin controlled by Lanliao Fault.During the Late Cretaceous the extended stress of basin converted to be com-pression,and about 400 meters of Mesozoic was eroded.In the Paleogene,the stage of large-scale rift basin area began.The pref-erential direction of extended stress was NW-SE.From Neogene to Quaternary,the work area hegan the entire subsidence as a basin with the slight extension and the development of basin became stable.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第2期33-36,41,共5页
Petroleum Geology and Recovery Efficiency
基金
国家油气专项计划"华北前第三系油气资源战略调查及评价"(XQ-2004-03)
关键词
平衡剖面
盆地演化
应力场
张性构造
临清坳陷东部
balanced cross section
basin evolution
stress field
extensional structure
east area of the Linqing depression
