地球物理学进展 ›› 2019, Vol. 34 ›› Issue (5): 1938-1944.doi: 10.6038/pg2019CC0401

• 应用地球物理学Ⅰ(油气及金属矿产地球物理勘探) • 上一篇    下一篇

利用瞬态瑞雷面波法探测浅层玄武岩三维分布——以沙特Sabkhah Ad Dumathah地区为例

吴曲波1,2,潘自强1,2,陈金勇1,2,Mubarak3,Hani3   

  1. 1. 核工业北京地质研究院,北京 100029
    2. 中核集团铀资源勘查与评价技术重点实验室,北京 100029
    3. 沙特地质调查局,吉达 999088,沙特阿拉伯王国
  • 收稿日期:2018-12-01 修回日期:2019-06-26 出版日期:2019-10-28 发布日期:2019-10-28
  • 作者简介:吴曲波,男,1984年生,湖南衡阳人,硕士,高级工程师,主要从事地震勘探技术研究与应用研究.(E-mail: wdyqthl@163.com)
  • 基金资助:
    中核集团集中研发项目“龙灿”示范工程科研项目(第二阶段)(中核科发〔2018〕111号)与中核集团沙特阿拉伯铀钍资源普查项目联合资助.

Detecting the three-dimensional distribution of shallow basalt by Rayleigh wave method——taking the Sabkhah Ad Dumathah area in Saudi Arabia as an example

Qu-bo WU1,2,Zi-qiang PAN1,2,Jin-yong CHEN1,2, Mubarak3, Hani3   

  1. 1. Beijing Research Institute of Uranium Geology,Beijing 100029,China
    2. CNNC Key Laboratory of Uranium Exploration and Evaluation Technology,Beijing 100029,China
    3. Saudi Geological Survey, Jeddah 999088, Kingdom of Saudi Arabia
  • Received:2018-12-01 Revised:2019-06-26 Online:2019-10-28 Published:2019-10-28

摘要:

沙特Sabkhah Ad Dumathah地区浅层玄武岩的分布影响着该区钙结岩型铀矿的发育空间和分布范围,然而常规钻探、(电)磁法、重磁法等技术手段,对于该区浅层(约30 m以浅)玄武岩,存在探测难度.本文提出了利用瞬态瑞雷面波法开展浅层玄武岩探查试验研究,首先通过面波数据采集技术的系统试验研究,获取了较适用的面波数据采集方法,其次经过面波资料处理得到用于解释的面波速度映像图,最后基于该处理的三维面波速度映像图,解释了浅层玄武岩的三维分布范围和形态特征,通过与测区内已知钻孔资料进行对比,探测结果与地质认识相吻合.可见本文使用的面波勘探法能够较好地探测浅层玄武岩的三维空间分布规律特征,为今后类似工作提供重要参考和借鉴.

关键词: 瞬态瑞雷面波, 试验研究, 三维面波速度映像图, 玄武岩三维分布, 沙特Sabkhah Ad Dumathah地区

Abstract:

The distribution of shallow basalts in the Sabkhah Ad Dumathah area of Saudi Arabia affects the developmental space and distribution range of the calcium-type uranium deposits in this area. However, there are some difficulties in detecting the shallow basalts in 30 meters depth by the conventional drilling, electromagnetic methods, gravity and magnetic techniques, etc. This paper proposes a shallow basalt exploration test using transient rayleigh wave method. Firstly, through the systematic experimental research of surface wave data acquisition, a suitable surface wave acquisition scheme is obtained, and then the surface wave velocity map is obtained by data processing, and finally based on the processed 3D surface wave velocity map, the three-dimensional distribution shape and range of shallow basalt is interpreted. By comparing with the known drilling data in the survey area, the detection results are consistent with the geological understanding. It can be seen that the surface wave exploration method used in this paper can better detect the three-dimensional spatial distribution characteristics of shallow basalt,and provide important reference for similar work in the future.

Key words: Transient rayleigh wave, Experimental research, 3D surface wave velocity map, Three-dimensional distribution of basalt, Sabkhah Ad Dumathah area in Saudi Arabia

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