| 断层带土壤氢气浓度测量及其影响因素 |
| |
| 引用本文： | 孙小龙,邵志刚,司学芸,向 阳,刘冬英.断层带土壤氢气浓度测量及其影响因素[J].大地测量与地球动力学,2017,37(4):436-440. |
| |
| 作者姓名： | 孙小龙 邵志刚 司学芸 向 阳 刘冬英 |
| |
| 摘 要： | 利用ATG-300H型便携式测氢仪，分别在昌平地区、海原断裂带、北轮台断裂开展土壤氢气浓度测量。基于气体扩散方程，从采样器类型、测孔深度、土壤特性、断层作用等方面探讨氢气浓度测量的影响因素与机理。结果显示：1）土壤氢气浓度值受测孔闲置时间、测孔深度和采样器形状的影响较大；2）氢气浓度测值与气体扩散方程的理论解曲线吻合较好，其曲线形态主要与土壤中氢气的富集程度和土壤疏松程度密切相关；3）断层带上的氢气浓度受构造作用、断层滑动速率、断层闭锁程度、上下盘裂隙发育程度、裂隙开启或闭合状态等因素影响较大，这些因素主要影响深部氢气的向上迁移通道和在地表的富集程度。
|
| 关 键 词： | 断层带 土壤氢气 浓度 影响因素 |
Soil Hydrogen Concentration in Fault Zone: Analysis of Corresponding Influence Factors |
| |
| SUN Xiaolong,SHAO Zhigang,SI Xueyun,XIANG Yang,LIU Dongying.Soil Hydrogen Concentration in Fault Zone: Analysis of Corresponding Influence Factors[J].Journal of Geodesy and Geodynamics,2017,37(4):436-440. |
| |
| Authors: | SUN Xiaolong SHAO Zhigang SI Xueyun XIANG Yang LIU Dongying |
| |
| Abstract: | Using a portable hydrogen analyser, field measurements are performed to determine hydrogen (H2) concentrations in the soils of the north China plain, Loess plateau, Changping district, Haiyuan fault zone, and Beiluntai fault at the edge of south Tianshan. The factors affecting soil gas H2 concentration, such as the sampler type, test hole depth, soil characteristics, and fault characteristics, and the mechanisms of their influence are discussed in terms of a gas diffusion equation. The results show that: (1) the soil gas H2 concentration is mainly affected by the time lapse between the hole drilling and measurement, test hole depth, and sampler shape; (2) the measured soil gas H2 concentration agrees well with the analytical solution of the gas diffusion equation, and the curve shape is closely related to the degree of H2 enrichment in the soil and the soil density; and (3) the soil gas concentration in the fracture zone is largely affected by tectonism, the fault slip rate, the degree of fault locking, the development degree of fractures between the hanging wall and footwall, and the degree of fracture locking, because these factors can alter the H2 upward transport channels and degree of surface enrichment. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 |
|
