苟苏恒,吕佳阳,李柯良,刘亮亮,邵龙义

• 1:中国矿业大学(北京)煤炭资源与安全开采国家重点实验室
• 2:中国矿业大学(北京)地球科学与测绘工程学院
• 3:煤与煤层气共采国家重点实验室
• 4:易安蓝焰煤与煤层气共采技术有限责任公司

摘要(Abstract)：

依据地层序列的旋回信号进行地球轨道参数周期的识别，是确定深时时间尺度的有效方法之一。以沁水盆地左权地区山西组为例，使用时间序列分析法与相关系数法对钻孔剖面自然伽马测井曲线进行旋回性分析，并据此建立山西组年代地层标尺。使用频谱分析，在区内山西组识别出7.13 m、1.62～2.23 m的优势沉积旋回，分别对应405 kyr的长偏心率周期和91.9～126.4 kyr的短偏心率周期，经过天文检验，证实沁水盆地山西组受到天文周期驱动。通过高斯带通滤波，建立沁水盆地山西组“浮动”天文年代标尺，确定出9个405 kyr长偏心率旋回，据此获得山西组沉积时限为3.82 Myr。建立的天文年代标尺可为沁水盆地山西组古环境、古气候和各种地质事件的演化提供年代学依据。

关键词(KeyWords)： 山西组;旋回地层学;天文年代标尺;轨道参数周期;沁水盆地

Abstract:

Keywords:

基金项目(Foundation): 煤炭资源与安全开采国家重点实验室开放基金（SKLCRSM22DC01）;; 大学生创新训练项目（202102020）;; 山西省科技计划揭榜招标资助项目（20201101004）

作者(Author): 苟苏恒,吕佳阳,李柯良,刘亮亮,邵龙义

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