Corrigendum to “Characterization of Geotomographic Studies with the EMRE System”

IF 1 Q3 GEOCHEMISTRY & GEOPHYSICS
A. Korpisalo
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引用次数: 0

Abstract

Posiva Oy carries out research and development on spent nuclear fuel disposal in Finland.The repository will be constructed deep in the crystalline bedrock of Olkiluoto island in Eurajoki. Posiva Oy and ANDRA (France) have cooperated actively in examining methods for revealing properties of granitic bedrock. One of the considered methods was an electromagnetic cross-borehole survey, and RIM measurements were conducted in 2009. Olkiluoto migmatitic bedrock has undergone polyphasic ductile-brittle deformation and resistivity in the bedrock varies strongly in range of tens to tens of thousands ofΩm. Field work was successfully performed in one borehole pair. The results are presented in this paper. The tomographic reconstruction of the borehole section is based on the far-field approximation of the electric field. The results prove that the method can be used between boreholes to delineate and follow sulphide-bearing horizons. The detected low and high resistivity zones and their apparent shapes and orientations are in fair agreement with geological and other geophysical results.The obtained information can be used, for example, in assessing the integrity of the rock mass, as the increased electrical conductivity is often associated with rock mass deformation (clay and water bearing fractures, sulphide and graphite bearing zones).
“用电子环境测量系统描述地貌学研究”的勘误表
Posiva Oy在芬兰进行乏核燃料处理的研发。该储存库将建在Eurajoki Olkiluoto岛的结晶基岩深处。Posiva Oy和ANDRA(法国)积极合作,研究揭示花岗岩基岩性质的方法。考虑的方法之一是电磁井间测量,RIM测量于2009年进行。Olkiluoto混合岩化基岩经历了多相韧性-脆性变形,基岩电阻率变化很大,在几十到数万Ωm之间。现场工作在一对钻孔中成功完成。本文给出了结果。钻孔剖面的断层重建是基于电场的远场近似。结果表明,该方法可在钻孔之间用于描绘和跟踪含硫化物地层。探测到的低电阻率带和高电阻率带及其明显的形状和方向与地质和其他地球物理结果基本一致。例如,所获得的信息可用于评估岩体的完整性,因为电导率的增加通常与岩体变形有关(粘土和含水裂缝、硫化物和石墨带)。
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来源期刊
International Journal of Geophysics
International Journal of Geophysics GEOCHEMISTRY & GEOPHYSICS-
CiteScore
1.50
自引率
0.00%
发文量
12
审稿时长
21 weeks
期刊介绍: International Journal of Geophysics is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in all areas of theoretical, observational, applied, and computational geophysics.
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