All Stories

  1. A case-history using gravity data to validate alternate interpretations of the material below a deep seismic reflector in the Matheson area of Ontario, Canada

    Article • Geophysics, July 2024, Society of Exploration Geophysicists

    Fabiano Della Justina , Prof Richard S Smith

  2. A case-history tutorial describing the incorporation of geophysical, petrophysical and geological constraints to generate realistic geological models of the Matheson Study Area, Ontario

    Article • Geophysics, July 2024, Society of Exploration Geophysicists

    Fabiano Della Justina , Prof Richard S Smith, Rajesh Vayavur

  3. Using gravity-data uncertainties in forward modeling to estimate uncertainties in model parameters: a case history in estimating the dip and the dip uncertainty of the Porcupine Destor Fault

    Article • Geophysics, February 2024, Society of Exploration Geophysicists

    Fabiano Della Justina , Prof Richard S Smith

  4. Geophysical transects in the Abitibi greenstone belt of Canada from the mineral-exploration-oriented Metal Earth project

    Article • The Leading Edge, April 2023, Society of Exploration Geophysicists

    Prof Richard S Smith, Rajesh Vayavur, Hossein Jodeiri Akbari Fam, Christopher Mancuso, Mostafa Naghizadeh, Esmaeil Eshaghi, Fabiano Della Justina

  5. 3D generalized spherical multifocusing seismic imaging

    Article • Geophysics, November 2022, Society of Exploration Geophysicists

    Hossein Jodeiri Akbari Fam, Prof Richard S Smith, Oz Yilmaz, Mostafa Naghizadeh

  6. Open-source software for two-dimensional Fourier processing of gridded magnetic data

    Article • The Leading Edge, July 2022, Society of Exploration Geophysicists

    Prof Richard S Smith

  7. How magnetic susceptibilities measured on outcrops can be used for modelling (and constraining inversions of) aeromagnetic data

    Article • Exploration Geophysics, May 2022, Taylor & Francis

    Prof Richard S Smith

  8. Forward modeling and 3D inversion of electromagnetic data collected over the McArthur River uranium deposit in the Athabasca Basin, Canada

    Article • Geophysics, February 2022, Society of Exploration Geophysicists

    Reza Mir, Martin Ross, Mohamed Gouiza, Prof Richard S Smith

  9. Active and Passive Seismic Imaging of the Central Abitibi Greenstone Belt, Larder Lake, Ontario

    Article • Journal of Geophysical Research Solid Earth, February 2022, American Geophysical Union (AGU)

    Prof Richard S Smith

  10. Transformation of magnetic data to the pole and vertical dip and a related apparent susceptibility transform: Exact and approximate approaches

    Article • Geophysics, January 2022, Society of Exploration Geophysicists

    Prof Richard S Smith, Rajesh Vayavur

  11. Estimating the parameters of simple models from two-component on-time airborne electromagnetic data

    Article • Geophysics, November 2021, Society of Exploration Geophysicists

    Prof Richard S Smith

  12. Convolutional neural networks applied to the interpretation of lineaments in aeromagnetic data

    Article • Geophysics, November 2021, Society of Exploration Geophysicists

    Prof Richard S Smith

  13. Active and passive seismic imaging of the central Abitibi greenstone belt, Larder Lake, Ontario

    Article • May 2021, Wiley

    Prof Richard S Smith

  14. Multiple-order moments of the transient electromagnetic response of a one-dimensional earth with finite conductance – the Gaussian variation applied to a field example

    Article • Exploration Geophysics, May 2021, Taylor & Francis

    Prof Richard S Smith

  15. On Archean craton growth and stabilisation: Insights from lithospheric resistivity structure of the Superior Province

    Article • Earth and Planetary Science Letters, May 2021, Elsevier

    Prof Richard S Smith

  16. Multiple-order moments of the transient electromagnetic response of a one-dimensional earth with finite conductance – theory

    Article • Exploration Geophysics, May 2020, Taylor & Francis

    Prof Richard S Smith

  17. On the time decay constant of AEM systems: a semi-heuristic algorithm to validate calculations.

    Article • Exploration Geophysics, October 2019, Taylor & Francis

    Prof Richard S Smith, Jose Martinez

  18. A new method for interpolating linear features in aeromagnetic data

    Article • Geophysics, May 2019, Society of Exploration Geophysicists

    Prof Richard S Smith

  19. Resistivity and anisotropy as a proxy for structural complexity

    Article • Geophysics, March 2019, Society of Exploration Geophysicists

    Prof Richard S Smith, Reza Mir

  20. An airborne EM system for nickel sulphide exploration

    Article • Geophysics, September 2018, Society of Exploration Geophysicists

    Prof Richard S Smith

  21. The impact of magnetic viscosity on time-domain electromagnetic data from iron oxide minerals embedded in rocks at Opemiska, Québec, Canada

    Article • Geophysics, September 2017, Society of Exploration Geophysicists

    Prof Richard S Smith

  22. Inductive electromagnetic data interpretation using a 3D distribution of 3D magnetic or electric dipoles

    Article • Geophysics, July 2017, Society of Exploration Geophysicists

    Prof Richard S Smith

  23. Modelling and straight-ray tomographic imaging studies of cross-hole radio-frequency electromagnetic data for mineral exploration

    Article • Geophysical Prospecting, May 2017, Wiley

    Prof Richard S Smith, Yongxing Li

  24. Using constrained inversion of gravity and magnetic field to produce a 3D litho-prediction model

    Article • Geophysical Prospecting, February 2017, Wiley

    Prof Richard S Smith

  25. Approximate semianalytical solutions for the electromagnetic response of a dipping-sphere interacting with conductive overburden

    Article • Geophysics, July 2016, Society of Exploration Geophysicists

    Prof Richard S Smith

  26. The effect of dielectric permittivity on the fields radiated from a radio-frequency electric dipole in a homogeneous whole space

    Article • Geophysics, March 2016, Society of Exploration Geophysicists

    Prof Richard S Smith

  27. Combining spatial components and Hilbert transforms to interpret ground-time-domain electromagnetic data

    Article • Geophysics, July 2015, Society of Exploration Geophysicists

    Prof Richard S Smith

  28. A multiple transmitter and receiver electromagnetic system for improved target detection

    Article • Geophysics, July 2015, Society of Exploration Geophysicists

    Prof Richard S Smith

  29. Clustering of downhole physical property measurements at the Victoria property, Sudbury for the purpose of extracting lithological information

    Article • Journal of Applied Geophysics, July 2015, Elsevier

    Prof Richard S Smith

  30. Regional 3D geophysical investigation of the Sudbury Structure

    Article • Interpretation, May 2015, Society of Exploration Geophysicists

    Prof Richard S Smith

  31. Introduction to special section: Mining and minerals exploration interpretation

    Article • Interpretation, May 2015, Society of Exploration Geophysicists

    Prof Richard S Smith

  32. A procedure for collecting electromagnetic data using multiple transmitters and receivers capable of deep and focused exploration

    Article • Geophysics, January 2015, Society of Exploration Geophysicists

    Prof Richard S Smith

  33. Robust conductance estimates from spatial and temporal derivatives of borehole electromagnetic data

    Article • Geophysics, May 2014, Society of Exploration Geophysicists

    Prof Richard S Smith

  34. Mapping lateral changes in conductance of a thin sheet using time-domain inductive electromagnetic data

    Article • Geophysics, January 2014, Society of Exploration Geophysicists

    Prof Richard S Smith

  35. Using spatial derivatives of electromagnetic data to map lateral conductance variations in thin-sheet models: Applications over mine tailings ponds

    Article • Geophysics, September 2013, Society of Exploration Geophysicists

    Prof Richard S Smith

  36. Qualitative geophysical interpretation of the Sudbury Structure

    Article • Interpretation, August 2013, Society of Exploration Geophysicists

    Prof Richard S Smith, Bill Morris

  37. Electromagnetic Induction Methods in Mining Geophysics from 2008 to 2012

    Article • Surveys in Geophysics, April 2013, Springer Science + Business Media

    Prof Richard S Smith

  38. Using combinations of spatial gradients to improve the detectability of buried conductors below or within conductive material

    Article • Geophysics, January 2013, Society of Exploration Geophysicists

    Prof Richard S Smith

  39. Precision requirements for specifying transmitter waveforms used for modelling the off-time electromagnetic response

    Article • Exploration Geophysics, January 2013, CSIRO Publishing

    Prof Richard S Smith

  40. Qualitative geophysical interpretation of the Sudbury structure

    Article • September 2012, Society of Exploration Geophysicists

    Prof Richard S Smith

  41. Using spatial gradients of electromagnetic data to map lateral variations in mine tailings

    Article • September 2012, Society of Exploration Geophysicists

    Prof Richard S Smith

  42. A grid implementation of the SLUTH algorithm for visualising the depth and structural index of magnetic sources

    Article • Computers & Geosciences, July 2012, Elsevier

    Prof Richard S Smith

  43. How to make better use of physical properties in mineral exploration: The exploration site measurement

    Article • The Leading Edge, March 2012, Society of Exploration Geophysicists

    Prof Richard S Smith

  44. Metalliferous mining geophysics— State of the art after a decade in the new millennium

    Article • Geophysics, July 2011, Society of Exploration Geophysicists

    Marc Vallée, Prof Richard S Smith

  45. Mapping laterally varying conductance using EM gradients over dry tailings ponds

    Article • January 2011, Society of Exploration Geophysicists

    Prof Richard S Smith

  46. A comparison of airborne electromagnetic data with ground resistivity data over the Midwest deposit in the Athabasca basin

    Article • Near Surface Geophysics, January 2011, Wiley

    Prof Richard S Smith

  47. Automation of the SLUTH method: a novel approach to airborne magnetic data interpretation

    Article • Near Surface Geophysics, July 2010, Wiley

    Prof Richard S Smith

  48. Detection of alteration at the Millennium uranium deposit in the Athabasca Basin: a comparison of data from two airborne electromagnetic systems with ground resistivity data

    Article • Geophysical Prospecting, April 2010, Wiley

    Prof Richard S Smith

  49. Combined airborne time-domain electromagnetics and power-line field survey

    Article • Geophysics, March 2010, Society of Exploration Geophysicists

    Marc Vallée, Prof Richard S Smith

  50. Sferics noise reduction in time-domain electromagnetic systems: application to MegaTEMIIsignal enhancement

    Article • Exploration Geophysics, January 2010, CSIRO Publishing

    Prof Richard S Smith

  51. Sensitivity cross-sections in airborne electromagnetic methods using discrete conductors

    Article • Exploration Geophysics, January 2010, CSIRO Publishing

    Prof Richard S Smith

  52. Application of Occam's inversion to airborne time-domain electromagnetics

    Article • The Leading Edge, March 2009, Society of Exploration Geophysicists

    Marc Vallée, Prof Richard S Smith

  53. Case histories illustrating the characteristics of the HeliGEOTEM system

    Article • Exploration Geophysics, January 2009, CSIRO Publishing

    Prof Richard S Smith

  54. Advances in airborne geophysical systems for ordnance mapping and detection

    Article • The Leading Edge, November 2008, Society of Exploration Geophysicists

    Prof Richard S Smith

  55. Interpretation of magnetic data using tilt-angle derivatives

    Article • Geophysics, January 2008, Society of Exploration Geophysicists

    Prof Richard S Smith

  56. Mapping tailings around mine sites with reverse polarity airborne transient EM data

    Article • January 2008, Society of Exploration Geophysicists

    Prof Richard S Smith

  57. Geological mapping with power line fields measured with MEGATEM data

    Article • January 2008, Society of Exploration Geophysicists

    Marc Vallée, Prof Richard S Smith

  58. Tilt-depth method: A simple depth estimation method using first-order magnetic derivatives

    Article • The Leading Edge, December 2007, Society of Exploration Geophysicists

    Prof Richard S Smith

  59. Source location using total-field homogeneity: Introducing the SLUTH method for depth estimation

    Article • The Leading Edge, October 2007, Society of Exploration Geophysicists

    Jeff Thurston, Prof Richard S Smith

  60. A discrete conductor transformation of airborne electromagnetic data

    Article • Near Surface Geophysics, February 2007, Wiley

    Prof Richard S Smith

  61. Generalized magnetic tilt‐Euler deconvolution

    Article • January 2007, Society of Exploration Geophysicists

    Prof Richard S Smith

  62. Combining airborne electromagnetic data from alternating flight directions to form a virtual symmetric array

    Article • Geophysics, March 2006, Society of Exploration Geophysicists

    Prof Richard S Smith

  63. Airborne EM measurements over the Shea Creek uranium prospect, Saskatchewan, Canada

    Article • January 2006, Society of Exploration Geophysicists

    Prof Richard S Smith

  64. A discrete conductor transformation of airborne electromagnetic data

    Article • January 2006, Society of Exploration Geophysicists

    Prof Richard S Smith

  65. An analysis of geophysical and geological data from the Iso/New Insco test site, Quebec, Canada

    Article • January 2006, Society of Exploration Geophysicists

    Prof Richard S Smith

  66. Geophysical Case Study of the Iso and New Insco Deposits, Quebec, Canada, Part I: Data Comparison and Analysis

    Article • Exploration and Mining Geology, January 2006, GeoScienceWorld

    Prof Richard S Smith

  67. Geophysical Case Study of the Iso and New Insco Deposits, Quebec, Canada, Part II: Modeling and Interpretation

    Article • Exploration and Mining Geology, January 2006, GeoScienceWorld

    Prof Richard S Smith

  68. Quantifying the Effects That Changes in Transmitter-Receiver Geometry Have on the Capability of an Airborne Electromagnetic Survey System to Detect Good Conductors

    Article • Exploration and Mining Geology, January 2006, GeoScienceWorld

    Prof Richard S Smith

  69. Interpolation and gridding of aliased geophysical data using constrained anisotropic diffusion to enhance trends

    Article • Geophysics, September 2005, Society of Exploration Geophysicists

    Prof Richard S Smith

  70. An enhanced method for source parameter imaging of magnetic data collected for mineral exploration

    Article • Geophysical Prospecting, September 2005, Wiley

    Prof Richard S Smith

  71. Imaging depth, structure, and susceptibility from magnetic data: The advanced source-parameter imaging method

    Article • Geophysics, July 2005, Society of Exploration Geophysicists

    Prof Richard S Smith

  72. Interpretation of magnetic data using an enhanced local wavenumber (ELW) method

    Article • Geophysics, March 2005, Society of Exploration Geophysicists

    Prof Richard S Smith

  73. Gridding aeromagnetic data using longitudinal and transverse horizontal gradients with the minimum curvature operator

    Article • The Leading Edge, February 2005, Society of Exploration Geophysicists

    Prof Richard S Smith

  74. Approximate apparent conductance (or conductivity) from the realizable moments of the impulse response

    Article • Geophysics, January 2005, Society of Exploration Geophysicists

    Prof Richard S Smith

  75. Depth and structural index from normalized local wavenumber of 2D magnetic anomalies

    Article • Geophysical Prospecting, January 2005, Wiley

    Prof Richard S Smith

  76. Using realizable moments of the impulse response to estimate the approximate apparent conductance or apparent conductivity of the ground

    Article • January 2004, Society of Exploration Geophysicists

    Prof Richard S Smith

  77. Interpolation and gridding of aliased geophysical data using constrained anisotropic diffusion to enhance trends

    Article • January 2004, Society of Exploration Geophysicists

    Prof Richard S Smith

  78. Using airborne EM surveys to investigate the hydrogeology of an area near Nyborg, Denmark

    Article • January 2004, Society of Exploration Geophysicists

    Prof Richard S Smith

  79. Combining airborne electromagnetic data from alternate flight directions to improve data interpretability: the virtual symmetric array

    Article • January 2004, Society of Exploration Geophysicists

    Prof Richard S Smith

  80. Using a non-integer moment of the impulse response to estimate the half-space conductivity

    Article • Geophysical Prospecting, August 2003, Wiley

    Prof Richard S Smith

  81. To “The moments of the impulse response: A new paradigm for the interpretation of transient electromagnetic data” (Richard S. Smith and Terry J. Lee, GEOPHYSICS, 67, 1095–1103).

    Article • Geophysics, January 2003, Society of Exploration Geophysicists

    Prof Richard S Smith

  82. The moments of the impulse response of a transient electromagnetic decay

    Article • Geophysics, July 2002, Society of Exploration Geophysicists

    Prof Richard S Smith

  83. A multimodel method for depth estimation from magnetic data

    Article • Geophysics, March 2002, Society of Exploration Geophysicists

    Jeff Thurston, Prof Richard S Smith

  84. Using the moments of a thick layer to map conductance and conductivity from airborne electromagnetic data

    Article • Journal of Applied Geophysics, March 2002, Elsevier

    Prof Richard S Smith

  85. The moments of the impulse response, a new paradigm for the interpretation of transient electromagnetic data

    Article • January 2002, Society of Exploration Geophysicists

    Prof Richard S Smith

  86. A comparison of data from airborne, semi‐airborne, and ground electromagnetic systems

    Article • Geophysics, September 2001, Society of Exploration Geophysicists

    Prof Richard S Smith

  87. On removing the primary field from fixed-wing time-domain airborne electromagnetic data: some consequences for quantitative modelling, estimating bird position and detecting perfect conductors

    Article • Geophysical Prospecting, July 2001, Wiley

    Prof Richard S Smith

  88. Using an induction coil sensor to indirectly measure theB-field response in the bandwidth of the transient electromagnetic method

    Article • Geophysics, September 2000, Society of Exploration Geophysicists

    Prof Richard S Smith

  89. The realizable resistive limit: A new concept for mapping geological features spanning a broad range of conductances

    Article • Geophysics, July 2000, Society of Exploration Geophysicists

    Prof Richard S Smith

  90. Robust estimation of the band‐limited inductive‐limit response from impulse‐response TEM measurements taken during the transmitter switch‐off and the transmitter off‐time: Theory and an example from Voisey’s Bay, Labrador, Canada

    Article • Geophysics, March 2000, Society of Exploration Geophysicists

    Prof Richard S Smith

  91. An experiment to compare airborne, semi‐airborne and ground electromagnetic systems

    Article • January 2000, Society of Exploration Geophysicists

    Prof Richard S Smith

  92. Model‐independent depth estimation with the SPI™ method

    Article • January 1999, Society of Exploration Geophysicists

    Prof Richard S Smith

  93. iSPI TM — the improved source parameter imaging method

    Article • Geophysical Prospecting, March 1998, Wiley

    Prof Richard S Smith

  94. Automatic conversion of magnetic data to depth, dip, and susceptibility contrast using the SPI (TM) method

    Article • Geophysics, May 1997, Society of Exploration Geophysicists

    Jeff Thurston, Prof Richard S Smith

  95. A special circumstance of airborne induced‐polarization measurements

    Article • Geophysics, January 1996, Society of Exploration Geophysicists

    Prof Richard S Smith

  96. Application of a modified GEOTEM® system to reconnaissance exploration for kimberlites in the Point Lake area, NWT, Canada

    Article • Geophysics, January 1996, Society of Exploration Geophysicists

    Prof Richard S Smith

  97. The usefulness of multicomponent, time‐domain airborne electromagnetic measurements

    Article • Geophysics, January 1996, Society of Exploration Geophysicists

    Prof Richard S Smith

  98. Geology from geophysics; or, converting magnetic data to depth, dip, and susceptibility contrast using the source parameter imaging (SPITM) method

    Article • January 1996, Society of Exploration Geophysicists

    Jeff Thurston, Prof Richard S Smith

  99. An automatic technique for presentation of coincident‐loop, impulse‐response, transient, electromagnetic data

    Article • Geophysics, October 1994, Society of Exploration Geophysicists

    Prof Richard S Smith

  100. Conductivity‐depth imaging of airborne electromagnetic step‐response data

    Article • Geophysics, January 1991, Society of Exploration Geophysicists

    Prof Richard S Smith

  101. Response by Richard Smith to the authors’ reply

    Article • Geophysics, December 1989, Society of Exploration Geophysicists

    Prof Richard S Smith

  102. On: “Induced‐polarization effects in time‐domain electromagnetic measurements” by M. F. Flis, G. A. Newman, and G. W. Hohmann (GEOPHYSICS, 54, 514–523, April 1989).

    Article • Geophysics, December 1989, Society of Exploration Geophysicists

    Prof Richard S Smith

  103. Field examples of negative coincident‐loop transient electromagnetic responses modeled with polarizable half‐planes

    Article • Geophysics, November 1989, Society of Exploration Geophysicists

    Prof Richard S Smith

  104. Inductive interaction between polarizable conductors: An explanation of a negative coincident‐loop transient electromagnetic response

    Article • Geophysics, May 1988, Society of Exploration Geophysicists

    Prof Richard S Smith

  105. Electromagnetic induction in an inhomogeneous conductive thin sheet

    Article • Geophysics, December 1987, Society of Exploration Geophysicists

    Prof Richard S Smith