地球物理学进展 ›› 2019, Vol. 34 ›› Issue (6): 2406-2413.doi: 10.6038/pg2019CC0456

• 应用地球物理学Ⅱ(海洋、工程、环境、仪器等) • 上一篇    下一篇

约束变密度界面反演法在渤海深部结构研究中的应用

陈光希1, 张明华2, 张盛2   

  1. 1. 中国地质大学(北京),北京 100083;
    2. 中国地质调查局发展研究中心,北京 100037;
  • 收稿日期:2019-01-19 修回日期:2019-06-10 出版日期:2019-12-20 发布日期:2019-12-29
  • 作者简介:陈光希,男,1993年生,硕士研究生,研究方向为地质工程专业综合物探.(E-mail:2416719734@qq.com)
  • 基金资助:
    国家地质数据库建设与整合项目(DD20160351)资助.

Constraint interface inversion with variable density model used in the study of deep structure of Bohai

CHEN Guang-xi1, ZHANG Ming-hua2, ZHANG Sheng2   

  1. 1. School of Geophysics and Information Technology China University of Geosciences, Beijing 100083, China;
    2. China Geological Survey Development Research Center, Beijing 100037, China
  • Received:2019-01-19 Revised:2019-06-10 Online:2019-12-20 Published:2019-12-29

摘要: 在分析研究约束变密度界面反演基础理论及其方法应用的基础上,本文以我国渤海深部结构为研究对象,利用变密度反演法,对渤海海域主要坳陷进行沉积厚度的反演及其与断层等的综合解释工作,而后对地壳与地幔之间存在的重要分界面-莫霍面,基于已有的对莫霍面信息有较为系统、整体性反应的研究区重力数据,对其进行变密度反演计算,获得了研究区莫霍面的深度分布情况.通过与已知的地质地球物理资料,主要地震OBS测深等前人研究成果相互对比验证,取得了较为良好的效果.在此基础上,进一步证明约束变密度界面反演法在沉积界面反演、深部构造研究等方面,可以为其他勘探区域的研究提供较为准确可靠的方法参考,从而丰富发展地球物理反演工作.

关键词: 约束, 变密度界面, 反演模型, 沉积厚度, 莫霍面

Abstract: Based on the analysis and study of the basic theory and application of constraint interface inversion with variable density model,the paper takes the deep structure of Bohai Sea in China as the research object, use the method, performing inversion calculation against mainly the deposition depression, and its comprehension interpretation of faults, then for the problem of the important density interface between the crust and the upper mantle-Moho. performing inversion calculation based on the gravity anomaly data which systematicly and holistically response the Moho infomation in study area. Obtained a more systematic Moho depth information in the study area. By contrast with the known geological and geophysical data, mainly the OBS and so on, we achieved relatively good results. On this basis, it is further proved that the constraint interface inversion with variable density model can provide more accurate and reliable method reference for research in other exploration areas in sedimentary interface inversion and deep structural research.Then enriching the development of geophysical inversion.

Key words: Constraint, Variable density interface, Inversion model, Deposition thickness, Moho

中图分类号: