the maximum flood surface is the turn-point of the rising and falling of the baselevel . once these two surfaces are defined, a intergrated sequence can be classificated . the principle of this area's sequence classfication is using seismic data to classificate the third-sequences 2、首次将高分辨率层序地层学的基本理论应用于研究区,在分析岩芯、测井资料及三维地震资料基础上建立了层序地层等时格架。
it is most important to define the sequence boundary and the maximum flood surface for sequence classification . sequence boundary is the turn-point of the falling and rising of the baselevel . the maximum flood surface is the turn-point of the rising and falling of the baselevel 层序的划分最重要是确定层序界面和最大洪泛面,层序界面为基准面下降和上升的转折点,而最大洪泛面是基准面上升到下降的转折点,这两个面一旦确定,就可以划分一个相对完整的层序。
it is most important to define the sequence boundary and the maximum flood surface for sequence classification . sequence boundary is the turn-point of the falling and rising of the baselevel . the maximum flood surface is the turn-point of the rising and falling of the baselevel 层序的划分最重要是确定层序界面和最大洪泛面,层序界面为基准面下降和上升的转折点,而最大洪泛面是基准面上升到下降的转折点,这两个面一旦确定,就可以划分一个相对完整的层序。
linnan sub-depression which is mesozoic and cenozoic faulted lacustrine basin is located in the southwestern part of huimin sag, depression of jiyang . it is dominated by lacustrine-fill sub-depression . based on well logs, three-dimension seismic profiles, cores and other basic data, 10 horizons including 6 turnaround surfaces and 4 maximum flooding surfaces are defined from es3 to the lower part of es2 formation, and 1 long-term and 5 intermediate-term base-level cycles which are named from c5 to c1 could be identified, and then the chronostratigraphic framework of the sub-depression is built 本文以岩心、钻井、测井、地震资料为基础,在下第三系沙三段沙二下的一个长期基准面旋回(二级层序)内部识别出10个有时间地层对比意义的界面,包括6个基准面下降到上升的转换面(层序界面),4个基准面上升到下降的转换面(湖泛面),划分出c1-c5五个中期基准面旋回,建立了等时地层格架地层格架。