【摘要】 应用沉积相分析和层序地层研究方法,系统研究了鄂尔多斯盆地侏罗系沉积特征和层序界面的综合识别,总结出了7种层序界面的物质表现形式,将盆地侏罗系划分出2个超长期、9个长期和19个中期基准面旋回。进一步探讨了盆地侏罗系"层序-沉积-构造"之间的耦合关系,认为富县期-延安期整个盆地经历了4次较大的构造沉降旋回,对应于4个长期基准面旋回;直罗期-芬芳河期,盆地再一次经历了较完整的由抬升、充填再到强烈抬升的演化过程,共发育有5次大的旋回,分别对应于5个长期基准面旋回。更多还原

【Abstract】 By using the technique of sedimentary facies analysis and sequence stratigraphy theory,the paper systematically studies the depositional characteristics and sequence surface of Jurassic in Ordos Basin and summarizes that there have seven sequence surface types of material expression.According to the depositional characteristics,assemblage and sequence surface of Jurassic,there exist 2 super-long,9 long and 19 middle base-level cycles of Jurassic in Ordos Basin.Based on the research of the sedimentary sequence characters and depositional system,there develop alluvial fan,river,lake-delta,alluvial plain and drift bed during Jurassic stage.Finally,the paper inquires further out the coupling relationship of "sequence-sedimentation-structure" in Ordos Basin,and points out that the basin underwent 4 great tectonic fluctuation cycles from Yan’an stage to Fuxian stage,corresponding to 4 long base-level cycle(LSC1~LSC4),and 5 huge cycles during Zhiluo stage to Fenfanghe stage,corresponding to 5 long base-level cycle(LSC5~LSC9).更多还原