2D Electrical Resistivity Imaging for the Investigation of the Subsurface Structures at the Proposed Site for Kauridan Estate at Ibagwa - Nike, Southeastern Nigeria

G. Z. Ugwu, P. Ezema
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引用次数: 7

Abstract

Electrical resistivity imaging survey was carried out at the proposed site for Kauridan Estate at Ibagwa - Nike, Southeastern Nigerian, in order to investigate the suitability of the subsurface geological structures for the housing estate. The multielectrode ABEM Lung resistivity meter system, employing the Wenner array, was used to acquire 2D resistivity data sets along six parallel profiles in the survey area. The acquired data was processed and interpreted using Res2DINV software to produce the 2D inverse resistivity models. The subsurface images showed that the near surface materials, up to a depth of about 7m from the surface, have moderately high resistivity range of 728 - 1100Ωm, and were inferred to be coarse sand and gravel. These materials were underlain by other materials of a lower resistivity range of 164-358Ωm at a depth of 26.2m, which vary from shaley sand - shale. The images did not suggest the presence of clay formations or any other building constraints such as fractures, faults or voids.
二维电阻率成像技术在尼日利亚东南部Ibagwa - Nike的Kauridan地产拟建场地的地下结构调查
在尼日利亚东南部Ibagwa - Nike的Kauridan Estate的拟议场地进行了电阻率成像调查,以调查地下地质结构对住宅区的适用性。采用Wenner阵列的多电极ABEM肺电阻率仪系统,在调查区域沿6条平行剖面获取二维电阻率数据集。利用Res2DINV软件对采集的数据进行处理和解释,生成二维电阻率反演模型。地下成像结果显示,近地表物质深度达7m左右,电阻率范围为728 ~ 1100Ωm,为粗砂砾石。在26.2m深处,这些物质被其他电阻率范围较低的物质(164-358Ωm)所覆盖,这些物质不同于泥质砂-页岩。这些图像没有显示出粘土地层的存在,也没有任何其他建筑限制,比如裂缝、断层或空洞。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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