干旱区生态环境知识资源中心(Arid): ERT在西北干旱区隐伏断裂探测中的应用研究

Arid

	ERT在西北干旱区隐伏断裂探测中的应用研究
其他题名	Application of ERT in northwest arid areas buried fault exploration
	王冬青; 闫长红; 曹小红; 周启友; 廖爱民
来源期刊	地球物理学进展
ISSN	1004-2903
出版年	2016
卷号	31 期号:4 页码:1492-1498
中文摘要	高密度电阻率成像法(ERT)结合了电剖面法和电测深法的优点,在断裂构造探测方面有其独到的优势.但在ERT实际应用时尚存在电极装置有效性和电极距优化等问题.在西北干旱区还存在接地电阻高而导致无法供电的问题.本文即是针对这三方面问题,选取西北地区一条典型断裂信泉断裂,开展了实验研究.在垂直于该断裂方向上布设了四条测量剖面,开展了接地电阻降阻、电极装置和电极距实验.实验结果表明:(1)浇入自来水和Na Cl溶液,并使电极与周围介质紧密接触,可以很好的解决新疆干旱地区接地不良的问题(2)ERT不同装置形式和电极距可从不同侧面反应剖面特征,在实际应用中应综合分析不同装置和不同电极距探测结果,以获得丰富的剖面信息(3)信泉断裂的电性特征为:在反演电阻率剖面上有明显的错断,破碎带为低阻板状体异常;断裂上盘低阻层厚度小,下盘低阻层厚度大;断裂西段覆盖层变薄甚至局部地段基岩裸露,断裂中部覆盖层厚度较厚.
英文摘要	High density electrical resistivity tomography method( ERT) combines the advantages of Electric profiling with Electric sounding method,and has its unique advantages in terms of fault survey. However,in the application of ERT,there are problems such as the efficiency of the electrode device and the optimization of electrode spacing. In northwest arid,there are other question such as high grounding resistance which caused the method failed. The article aimed at the three question that above-mentioned, and selected a typical fault-Xinquan fault of northwest arid to conduct experiment research. Vertical the fault direction laid four ERT profile to carry out the grounding resistance and electrode device and electrode distance experiment. The results show that: ( 1) Poured into water or NaCl solution, and makes the electrodes closely contact with the surrounding medium is a good solution to the problem of bad grounding in Xinjiang arid area; ( 2 ) Different device and electrode spacing of ERT response profile characteristics from different aspects. In order to obtain more profile information we should analysis different devices and different electrode distance results in practical application; ( 3) The electric characteristic of Xinquan fault is: there is a obvious break on the resistivity profile, and fault zone is a low resistance plate abnormal. The thickness of the Low-resistivity cover layer on hanging wall is thin,but thick on footwall. The thickness of the Low-resistivity cover layer are simply thinned on the western part and even bedrock exposed,but thick on the central part.
中文关键词	高密度电阻率成像法(ERT) ; 干旱区 ; 隐伏断裂
英文关键词	high density electrical resistivity tomography arid areas concealed fault
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Mineralogy
WOS研究方向	Mineralogy
CSCD记录号	CSCD:5813863
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234093
作者单位	王冬青, 西北核技术研究所, 西安, 陕西 710024, 中国.; 闫长红, 西北核技术研究所, 西安, 陕西 710024, 中国.; 曹小红, 新疆工程学院, 乌鲁木齐, 新疆 830000, 中国.; 周启友, 南京大学地球科学与工程学院, 南京, 江苏 210093, 中国.; 廖爱民, 南京大学地球科学与工程学院, 南京, 江苏 210093, 中国.
推荐引用方式 GB/T 7714	王冬青,闫长红,曹小红,等. ERT在西北干旱区隐伏断裂探测中的应用研究[J],2016,31(4):1492-1498.
APA	王冬青,闫长红,曹小红,周启友,&廖爱民.(2016).ERT在西北干旱区隐伏断裂探测中的应用研究.地球物理学进展,31(4),1492-1498.
MLA	王冬青,et al."ERT在西北干旱区隐伏断裂探测中的应用研究".地球物理学进展 31.4(2016):1492-1498.