石油与天然气地质 ›› 2022, Vol. 43 ›› Issue (6): 1292-1308.doi: 10.11743/ogg20220602

• 油气地质 • 上一篇    

天文地层学研究程序及其在渤海湾盆地东营凹陷的应用实例分析

彭军1(), 于乐丹1(), 许天宇1, 韩浩东2, 杨一茗1   

  1. 1.西南石油大学 地球科学与技术学院,四川 成都 610500
    2.中国地质调查局 成都地质调查中心,四川 成都 610081
  • 收稿日期:2022-05-31 修回日期:2022-09-14 出版日期:2022-12-01 发布日期:2022-11-21
  • 通讯作者: 于乐丹 E-mail:pengjun@swpu.edu.cn;yldxsyhxs@126.com
  • 第一作者简介:彭军(1968—),男,教授、博士生导师,沉积学、储层地质学及层序地层学。E?mail: pengjun@swpu.edu.cn
  • 基金项目:
    国家自然科学基金面上项目(41872166)

Research procedure of astrostratigraphy and case study of Dongying Sag, Bohai Bay Basin

Jun Peng1(), Ledan Yu1(), Tianyu Xu1, Haodong Han2, Yiming Yang1   

  1. 1.School of Geoscience and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2.Chengdu Geological Survey Center,China Geological Survey,Chengdu,Sichuan 610081,China
  • Received:2022-05-31 Revised:2022-09-14 Online:2022-12-01 Published:2022-11-21
  • Contact: Ledan Yu E-mail:pengjun@swpu.edu.cn;yldxsyhxs@126.com

摘要:

天文地层学是基于米兰科维奇旋回理论,研究受地球轨道周期性变化控制形成的沉积地层序列的一门新兴的地层学分支学科。其应用广泛,自问世以来得到了迅速发展,但沉积地层序列替代参数的优选及数据处理方法的运用一直是旋回地层学研究的重点和难点。基于对渤海湾盆地东营凹陷沙河街组三段和四段天文地层旋回划分的研究及对国内外研究成果的调研可知,目前天文地层学研究的沉积地层序列替代参数包括古生物参数、地球物理参数及地球化学参数等;天文旋回识别方法主要有岩性直观识别法和时间序列分析法;轨道周期比值法、天文调谐法和假设检验法是旋回结果检验和调谐的方法。现阶段天文旋回地层研究需要关注的问题主要包括:沉积地层序列替代参数的优选及综合运用、多种时频分析方法的优选、旋回划分结果的校准及天文年代标尺的建立。提出了一套较为系统的从沉积地层序列替代参数选取到时间序列分析方法优选再到旋回结果检验的天文旋回研究流程,为将地层划分精细到千年-万年级别的亚米兰科维奇旋回提供一种可以推广的研究手段和方法,也为其他从事天文旋回的研究者们提供参考和借鉴,共同促进天文地层学的向前发展。

关键词: 米兰科维奇旋回, 地球轨道参数, 沉积地层序列替代参数, 时间序列分析, 天文调谐, 天文地层学, 东营凹陷, 渤海湾盆地

Abstract:

Astrostratigraphy is to study the sedimentary sequence formed by the periodic changes of the Earth's orbit based on the Milankovitch cycle theory. It has been developing rapidly since its inception and is widely applied. However, the application of indicators and methods of data processing have always been the focus and difficulty in cycle stratigraphy research. Based on the division of astronomical cycles in the third and fourth members of Shahejie Formation in the Dongying Sag (Es3 and Es4), as well as research results gained from both home and abroad, we know that the alternative parameters of sedimentary stratigraphic sequences in astrostratigraphy research at present include paleontological parameters, geophysical and geochemical parameters, etc. The astronomical cycle identification methods mainly include lithology-based visual identification and time series analysis. While the orbital period ratio method, astronomical modulation method and hypothesis testing method are for checking and tuning the results of cyclotrons. The issues in need of attention in the current astronomical cycle stratigraphic research mainly include: the comprehensive application of alternative indicators of sedimentary stratigraphic sequences, the optimization of multiple time-frequency analysis methods, the calibration of cycle division results, and the establishment of astronomical age scales. In this study, a relatively systematic set of astronomical cycle division schemes is sorted out including the selection of alternative indicators of depositional sequences, the optimization of time series analysis methods, and the verification of cycle results. It will be of value to studying the sub-Milankovitch cycle with fine subdivision of the stratum to the millennium and 10,000-year-old level, and of referential value for researchers interested in astronomical age scales, facilitating the development of astrostratigraphy.

Key words: Milankovitch cycle, Earth orbit parameter, alternative parameter of sedimentary stratigraphic sequence, time series analysis, astronomical tuning, astrostratigraphy Dongying Sag, Bohai Bay Basin

中图分类号: