张云, 吕敦玉, 刘长礼, 刘松波, 张建羽, 王翠玲, 孟舒然, 谢芷锋. 复杂沉积环境下松散地层层序简易划定方法[J]. 地质通报, 2020, 39(10): 1580-1588.
    引用本文: 张云, 吕敦玉, 刘长礼, 刘松波, 张建羽, 王翠玲, 孟舒然, 谢芷锋. 复杂沉积环境下松散地层层序简易划定方法[J]. 地质通报, 2020, 39(10): 1580-1588.
    ZHANG Yun, Lü Dunyu, LIU Changli, LIU Songbo, ZHANG Jianyu, WANG Cuiling, MENG Shuran, XIE Zhifeng. A discussion on a simple method for sequence delimitation of loose strata in complex sedimentary environment[J]. Geological Bulletin of China, 2020, 39(10): 1580-1588.
    Citation: ZHANG Yun, Lü Dunyu, LIU Changli, LIU Songbo, ZHANG Jianyu, WANG Cuiling, MENG Shuran, XIE Zhifeng. A discussion on a simple method for sequence delimitation of loose strata in complex sedimentary environment[J]. Geological Bulletin of China, 2020, 39(10): 1580-1588.

    复杂沉积环境下松散地层层序简易划定方法

    A discussion on a simple method for sequence delimitation of loose strata in complex sedimentary environment

    • 摘要: 第四系松散地层对工程建设、城市发展等影响较大,一些地区的沉积环境较复杂,给划分了解其地层层序变化带来很大困难。借助有限测年资料等,仅能反映样点附近情况,且费用很高。以郑州航空港北部一带为例,在深入分析其地质调查资料并结合对周边地质环境的成熟认知,以及现有关于第四纪时代划分与冷、暖气候变化认识等基础上,改进了一套由一系列关键划定步骤接续组成的,以侧重反映地层成因、岩性特征、沉积旋回变化,并含括地质构造运动、气候变化、地层年代信息等内容的地层层序划定方法,解决了上述难题。新方法划定结果符合区域地质环境的演进特征。一些特征明显的地层可在认识成熟的周边地区或地层组中找到印证,连同其他重要地质信息,可基本控制满足地层划分对地质年代的精度要求。

       

      Abstract: Quaternary loose strata play an important role in engineering construction and urban development.The complex sedimentary environment in some areas makes it difficult to divide and understand the stratigraphic sequence changes.With the help of limited dating data, the methodspreviously used can only reflect the situation near the sample points and is expensive.Taking the north of Zhengzhou Airport Area as an example, this paper discusses and improves a stratigraphic sequence delineation method, which is composed of a series of key division steps to focus on reflecting the formation genesis, lithological characteristics and sedimentary rotation changes of the strata, also including geological tectonic movement climate rotation changes and stratigraphic age information.The method was applied to the division of loose stratigraphic sequence in this area.This method can solve the existent problems very well.In addition, the delimitation results are in line with the evolution characteristics of geological environment in the working area.Some strata with obvious characteristics can be found in the adjacent areas and, in combination with other information indicators, the method can meet the accuracy requirements of stratigraphic sequence division in geological scale.

       

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