R
R. D. Barker
Researcher at University of Birmingham
Publications - 18
Citations - 3078
R. D. Barker is an academic researcher from University of Birmingham. The author has contributed to research in topics: Spectral induced polarisation & Electrical resistivity tomography. The author has an hindex of 9, co-authored 18 publications receiving 2798 citations. Previous affiliations of R. D. Barker include Federal University of Bahia.
Papers
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Journal ArticleDOI
Rapid least-squares inversion of apparent resistivity pseudosections by a quasi-Newton method1
M.H. Loke,R. D. Barker +1 more
TL;DR: In this paper, a smoothness-constrained least-squares method was used for the interpretation of data from resistivity tomography surveys on an 80486DX microcomputer.
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Practical techniques for 3D resistivity surveys and data inversion1
M.H. Loke,R. D. Barker +1 more
TL;DR: In this article, a smoothing-constrained least-squares inversion method is used for the data interpretation and the computing time required by this technique is greatly reduced by using a homogeneous half-space as the starting model so that the Jacobian matrix of partial derivatives can be calculated analytically.
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Characterization of sandstone by electrical spectroscopy for stratigraphical and hydrogeological investigations
J.B.T. Scott,R. D. Barker +1 more
TL;DR: In this paper, the in-phase and quadrature components of conductivity of Permo-Triassic sandstone samples taken from boreholes across the UK and saturated with a synthetic groundwater solution.
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Some hydrogeophysical properties of the Bunter Sandstone of Northwest England
R. D. Barker,P.F. Worthington +1 more
TL;DR: In this article, the authors investigated the relationship between porosity, formation resistivity factor and seismic velocity in the Bunter Sandstone and concluded that these relationships have important use in geophysical studies of these aquifers, and some practical aspects of their application are discussed.
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Methods for the calculation of true formation factors in the bunter sandstone of northwest england
TL;DR: In this paper, a laboratory investigation of the electrical properties of the Bunter Sandstone from the Fylde area of northwest Lancashire has demonstrated that measured values of the formation factor exhibit a marked variation with the concentration of the saturating electrolyte, presumably as a result of the conducting influences of the rock matrix.