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通过对米级旋回成因的讨论,提出了用米级旋回单元厚度比值法进行旋回层序识别和层序划分的方案。在对北京西山张夏组米级旋回详细识别的基础上,采用米级旋回单元厚度法进行了层序划分,划分结果与露头层序地层学的划分结果基本一致。米级旋回单元厚度比值法操作简单,使用方便,结果比较准确,有利于提高三级旋回层序识别及划分的精度,是一种行之有效的层序划分方法。
Based on the discussion of the genesis of the meridian cycle, a scheme of using the thickness ratio method of the meridian cycle unit to identify the sequence and divide the sequence is proposed. Based on the detailed identification of the Mi-level cycles in Zhangxia Formation, Xishan, Beijing, the sequence was divided by the thickness method of the Mi-scale cycle unit. The result of the division is basically the same as that of the outcrop sequence stratigraphy. The method of thickness ratio of rice-level cyclone is easy to operate, easy to use and the result is more accurate. It is helpful to improve the accuracy of the identification and classification of the three-level cycle. It is an effective method of sequence division.