Colin G. Farquharson:  Publications List

Papers | Selected conference presentations

Ansari, S., and C.G. Farquharson, 2014. 3D finite-element forward modeling of electromagnetic data using vector and scalar potentials and unstructured grids, Geophysics, 79, E149-E165. (DOI: 10.1190/geo2013-0172.1)
Lelièvre, P.G., and C.G. Farquharson, 2013. Gradient and smoothness regularization operators for geophysical inversion on unstructured meshes, Geophysical Journal International, 195, 330-341. (DOI: 10.1093/gji/ggt255)
Jahandari, H., and C.G. Farquharson, 2013. Forward modeling of gravity data using finite-volume and finite-element methods on unstructured grids, Geophysics, 78, G69-G80. (DOI:10.1190/geo2012-0246.1)
Miensopust, M.P., P. Queralt, A.G. Jones, and the 3D MT modellers, 2013. Magnetotelluric 3-D inversion -- a review of two successful workshops on forward and inversion code testing and comparison, Geophysical Journal International, 193, 1216-1238. (DOI:10.1093/gji/ggt066)
Mosher, C.R.W., and C.G. Farquharson, 2013. Minimum-structure borehole gravity inversion for mineral exploration: A synthetic modeling study, Geophysics, 78, G25-G39. (DOI: 10.1190/geo2012-0373.1)
Zheglova, P., C.G. Farquharson, and C.A. Hurich, 2013. 2-D reconstruction of boundaries with level set inversion of traveltimes, Geophysical Journal International, 192, 688-698. (DOI: 10.1093/gji/ggs035)
Everett, M., and C. Farquharson, 2012. Near-surface electromagnetic induction -- Introduction, Geophysics, 77, WB1-WB2.
Lelièvre, P.G., A. Carter-McAuslan, C. Farquharson, and C. Hurich, 2012. Unified geophysical and geological 3D Earth models, The Leading Edge, 31, 322-328. (DOI: 10.1190/1.3694900)
Lelièvre, P.G., C.G. Farquharson, and C.A. Hurich, 2012. Joint inversion of seismic traveltimes and gravity data on unstructured grids with application to mineral exploration, Geophysics, 77, K1-K15. (DOI: 10.1190/geo2011-0154.1)
Farquharson, C.G., and M.P. Miensopust, 2011. Three-dimensional finite-element modelling of magnetotelluric data with a divergence correction, Journal of Applied Geophysics, 75, 699-710. (DOI: 10.1016/j.jappgeo.2011.09.025)
Lelièvre, P.G., C.G. Farquharson, and C.A. Hurich, 2011. Inversion of first-arrival seismic traveltimes without rays, implemented on unstructured grids, Geophysical Journal International, 185, 749-763. (DOI: 10.1111/j.1365-246X.2011.04964.x)
Lelièvre, P.G., C.G. Farquharson, and C.A. Hurich, 2011. Computing first-arrival seismic traveltimes on unstructured 3-D tetrahedral grids using the Fast Marching Method, Geophysical Journal International, 184, 885-896. (DOI: 10.1111/j.1365-246X.2010.04880.x)
Martí, A., P. Queralt, J. Ledo and C.G. Farquharson, 2010. Dimensionality imprint of electrical anisotropy in magnetotelluric responses, Physics of the Earth and Planetary Interiors, 182, 139-151. (DOI: 10.1016/j.pepi.2010.07.007)
Farquharson, C.G., and J.A. Craven, 2009. Three-dimensional inversion of magnetotelluric data for mineral exploration: An example from the McArthur River uranium deposit, Saskatchewan, Canada, Journal of Applied Geophysics, 68, 450-458. (DOI: 10.1016/j.jappgeo.2008.02.002)
Farquharson, C.G, and C.R.W. Mosher, 2009. Three-dimensional modelling of gravity data using finite differences, Journal of Applied Geophysics, 68, 417-422. (DOI: 10.1016/j.jappgeo.2009.03.007)
Farquharson, C.G., M.R. Ash, and H.G. Miller, 2008. Geologically constrained gravity inversion for the Voisey's Bay ovoid deposit, The Leading Edge, 27, 64-69. (DOI: 10.1190/1.2831681)
Farquharson, C.G, 2008. Constructing piecewise-constant models in multidimensional minimum-structure inversions, Geophysics, 73, K1-K9. (DOI: 10.1190/1.2816650)
Lam, K., M.J. Yedlin, and C.G. Farquharson, 2007. Two-Dimensional Radio Frequency Tomography, IEEE Transactions on Microwave Theory and Techniques, 55, 801-808. (DOI: 10.1109/TMTT.2007.893654)
Farquharson, C.G., K. Duckworth and D.W. Oldenburg, 2006. Comparison of integral equation and physical scale modeling of the electromagnetic responses of models with large conductivity contrasts, Geophysics, 71, G169-G177. (DOI: 10.1190/1.2210847)
Jones, A.G., J. Ledo, I.J. Ferguson, C. Farquharson, X. Garcia, N. Grant, G. McNeice, B. Roberts, J. Spratt, G. Wennberg, L. Wolynec, and X. Wu, 2005. The electrical resistivity structure of Archean to Tertiary lithosphere along 3200 km of SNORCLE profiles, northwestern Canada, Canadian Journal of Earth Sciences, 42, 1257-1275.
Farquharson, C.G., and D.W. Oldenburg, 2004. A comparison of automatic techniques for estimating the regularization parameter in nonlinear inverse problems, Geophysical Journal International, 156, 411-425.
Farquharson, C.G., D.W. Oldenburg and P.S. Routh, 2003. Simultaneous one-dimensional inversion of loop-loop electromagnetic data for magnetic susceptibility and electrical conductivity, Geophysics, 68, 1857-1869.
Farquharson, C.G., and D.W. Oldenburg, 2002. An integral-equation solution to the geophysical electromagnetic forward-modelling problem, in Three-Dimensional Electromagnetics: Proceedings of the Second International Symposium, M.S. Zhdanov and P.E. Wannamaker (eds), Elsevier, 3-19.
Farquharson, C.G., D.W. Oldenburg and Y. Li, 1999. An Approximate Inversion Algorithm for Time-Domain Electromagnetic Surveys, Journal of Applied Geophysics, 42, 71-80.
Farquharson, C.G., and D.W. Oldenburg, 1999. Approximate Sensitivities for the Multi-Dimensional Electromagnetic Inverse Problem, in Three-Dimensional Electromagnetics, M.L. Oristaglio and B.R. Spies (eds), Society of Exploration Geophysicists, 256-264.
Farquharson, C.G., and D.W. Oldenburg, 1998. Nonlinear inversion using general measures of data misfit and model structure, Geophysical Journal International, 134, 213-227.
Oldenburg, D.W, Y. Li, C.G. Farquharson, P. Kowalczyk, T. Aravanis, A. King, P. Zhang and A. Watts, 1998. Applications of Geophysical Inversions in Mineral Exploration Problems, The Leading Edge, 17, 461-465.
Farquharson, C.G., and D.W. Oldenburg, 1996. Approximate sensitivities for the electromagnetic inverse problem, Geophysical Journal International, 126, 235-252.
Ogawa, Y., A.G. Jones, M.J. Unsworth, J.R. Booker, X. Lu, J. Craven, B. Roberts, J. Parmelee, C. Farquharson, 1996. Electrical conductivity structures of the Appalachian Orogen, Geophysical Research Letters, 23, 1597-1600.
Farquharson, C.G., and D.W. Oldenburg, 1993. Inversion of time-domain electromagnetic data for a horizontally layered Earth, Geophysical Journal International, 114, 433-442.
Ellis, R.G., C.G. Farquharson and D.W. Oldenburg, 1993. Approximate Inverse Mapping inversion of the COPROD2 data, Journal of Geomagnetism and Geoelectricity, 45, 1001-1012.
Jones, A.G., J.A. Craven, G.W. McNeice, I.J. Ferguson, T. Boyce, C.G. Farquharson and R.G. Ellis, 1993. North American Central Plains conductivity anomaly within the Trans-Hudson orogen in northern Saskatchewan, Canada, Geology, 21, 1027-1030.
Farquharson, C.G., and R. Thompson, 1992. The Blairgowrie magnetic anomaly and its interpretation using simplex optimisation, Transactions of the Royal Society of Edinburgh: Earth Sciences, 83, 509-518.

Selected conference presentations | Papers

Ansari, S., and C.G. Farquharson, A Potential Method for Three-dimensional Numerical Modeling of Geophysical Electromagnetic Problems, EAGE Conference and Exhibition, Amsterdam, 16-19 June, 2014. [PDF file of talk (75M).]
Jahandari, H., and C.G. Farquharson, Forward Modelling of Geophysical Electromagnetic Data on Unstructured Grids Using a Finite-volume Approach, EAGE Conference and Exhibition, Amsterdam, 16-19 June, 2014. [PDF file of talk (16M).]
Farquharson, C.G., P.G. Lelièvre, S. Ansari, and H. Jahandari, Towards Real Earth Models -- Computational Geophysics on Unstructured Tetrahedral Meshes?, EAGE Conference and Exhibition, Amsterdam, 16-19 June, 2014. [PDF file of talk (18M).]
Lelièvre, P.G., and C.G. Farquharson, 3D Geophysical Inversion for Contact Surfaces, EGU General Assembly, Vienna, 27 April - 2 May 2014. [PDF file of poster (2M).]
Carter-McAuslan. A., P.G. Lelièvre, and C.G. Farquharson, Joint Inversion of Gravity and Seismic Tomography Data for Modelling Magmatic Massive Sulphide Bodies, EGU General Assembly, Vienna, 27 April - 2 May 2014. [PDF file of poster (8M).]
Jahandari, H., and C.G. Farquharson, A finite-volume solution to the geophysical electromagnetic forward problem using unstructured grids, SEG Annual Meeting, Houston, 22-27 September 2013. [PDF file of talk (15M).]
Ansari, S., and C.G. Farquharson, Numerical modeling of geophysical electromagnetic inductive and galvanic phenomena, SEG Annual Meeting, Houston, 22-27 September 2013. [PDF file of talk (44M).]
Jahandari, H., and C.G. Farquharson, Finite volume modelling of electromagnetic data using unstructured staggered grids, 3DEM-5 5th International Symposium on Three-Dimensional Electromagnetics, Sapporo, 7-9 May 2013. [PDF file of talk (11M).]
Ansari, S., and C.G. Farquharson, Three dimensional modeling of controlled-source electromagnetic response for inductive and galvanic components, 3DEM-5 5th International Symposium on Three-Dimensional Electromagnetics, Sapporo, 7-9 May 2013. [PDF file of poster (29M).]
Lelièvre, P.G., C.G. Farquharson, and C.J. Tycholiz, Integrating geological constraints into 3D geophysical inversions using unstructured meshes, EGU General Assembly, Vienna, 7-12 April 2013.
Carter-McAuslan. A., P.G. Lelièvre, and C.G. Farquharson, Gravity and Seismic Tomography Joint Inversion: A synthetic study modelling magmatic massive sulphide type bodies, EGU General Assembly, Vienna, 7-12 April 2013. [PDF file of poster (3M).]
Carter-McAuslan, A., P.G. Lelièvre, and C.G. Farquharson, Joint inversion of seismic traveltime and gravity data: A synthetic study using geologically realistic models from the Voisey's Bay deposit, AGU Fall Meeting, San Francisco, 3-7 December, 2012.
Lelièvre, P.G., C.J. Tycholiz, and C.G. Farquharson, Constrained geophysical inversion on unstructured meshes, SEG Annual Meeting, Las Vegas, 4-9 November, 2012.
Lelièvre, P.G., P. Zheglova, T. Danek, and C.G. Farquharson, Geophysical inversion for contact surfaces, SEG Annual Meeting, Las Vegas, 4-9 November, 2012.
Zheglova, P., and C.G. Farquharson, Level set method in seismic inversion: 2D reconstruction of boundaries, SEG Annual Meeting, Las Vegas, 4-9 November, 2012. [PDF file of poster (1M).]
Ansari, S., and C.G. Farquharson, Three dimensional finite-element forward modelling of electromagnetic data using potentials and unstructured meshes, SEG Annual Meeting, Las Vegas, 4-9 November, 2012. [PDF file of mini version of poster (*100M*).]
Lelièvre, P.G., A. Carter-McAuslan, C.J. Tycholiz, C.G. Farquharson, and C.A. Hurich, Unstructured grid modelling to create 3D Earth models that unify geological and geophysical information, GAC-MAC Joint Annual Meeting, St. John's, 27-29 May 2012. [PDF file of talk (2.7M).]
Tycholiz, C.J., P.G. Lelièvre, and C.G. Farquharson, Geologically constrained inversion of airborne gravity gradiometer data using unstructured tetrahedral meshes, GAC-MAC Joint Annual Meeting, St. John's, 27-29 May 2012.
Carter-McAuslan, A., P.G. Lelièvre, G. Blades, and C.G. Farquharson, Testing joint inversion code with geologically realistic models, GAC-MAC Joint Annual Meeting, St. John's, 27-29 May 2012. [PDF file of talk (8.5M).]
Lelièvre, P.G., A. Carter-McAuslan, C.J. Tycholiz, C.G. Farquharson, and C.A. Hurich, Refining 3D Earth models by unifying geological and geophysical information on unstructured meshes, EGU General Assembly, Vienna, 22-27 April, 2012.
Lelièvre, P.G., P. Zheglova, T. Danek, and C.G. Farquharson, Parameterization of the Earth's subsurface to flexibly emphasize distinct rock units, EGU General Assembly, Vienna, 22-27 April, 2012. [PDF file of poster (1.2M).]
Danek, T., M. Wojdyla, and C.G. Farquharson, Bayesian inversion of geophysical data using combined particle swarm optimization and Metropolis sampling, EGU General Assembly, Vienna, 22-27 April, 2012.
Lelièvre, P.G., A. Carter-McAuslan, C.J. Tycholiz, C.G. Farquharson, and C.A. Hurich, Refining 3D Earth models through constrained joint inversion on flexible unstructured meshes, KEGS-DMEC Geophysical Symposium, Toronto, 3 March, 2012. [PDF file of talk (4.2M).]
Ansari, S., and C.G. Farquharson, 3D finite-element simulation of electromagnetic data for inductive and galvanic components, SEG Annual Meeting, San Antonio, 18-23 September, 2011.
Jahandari, H., and C.G. Farquharson, Forward modelling of gravity data for unstructured grids using the finite-volume method, SEG Annual Meeting, San Antonio, 18-23 September, 2011.
Farquharson, C.G., P.G. Lelièvre, and C.A. Hurich, Unified geophysical and geological 3-D Earth models, EGU General Assembly, Vienna, 3-8 April, 2011. [PDF file of talk (1.2M).]
Ansari, S., and C.G. Farquharson, 3D Finite-element Simulation of Controlled-source EM problems Using Edge and Nodal Interpolation functions, EGU General Assembly, Vienna, 3-8 April, 2011.
Martí, A., P. Queralt, J. Ledo, and C.G. Farquharson, Electrical anisotropy: dimensionality imprints in magnetoteluric responses and effects in isotropic inversion, EGU General Assembly, Vienna, 3-8 April, 2011.
Lelièvre, P.G., C.G. Farquharson, and C.A. Hurich, Inversion of First-Arrival Seismic Traveltimes on 3D Unstructured Grids Without Ray Tracing, Fall Meeting, AGU, San Francisco, Calif., 13-17 December, 2010.
Farquharson, C.G., P.G. Lelièvre, and C.A. Hurich, Joint inversion of seismic traveltimes and gravity data on unstructured grids with application to mineral exploration, Fall Meeting, AGU, San Francisco, Calif., 13-17 December, 2010.
Lelièvre, P.G., C.G. Farquharson, and C.A. Hurich, Joint inversion of seismic traveltimes and gravity data on unstructured grids with application to mineral exploration, SEG Annual Meeting, Denver, 17-22 October, 2010. [PDF file of talk (5.9M).]
Drew, M.C., C.G. Farquharson, and J.A. Craven, Three-dimensional modelling of the Nechako Basin magnetotelluric data set, 20th International Workshop on Electromagnetic Induction in the Earth, Giza, Egypt, 18-24 September 2010. [PDF file of the poster (34M).]
Lelièvre, P.G., C.G. Farquharson, and C.A. Hurich, Joint inversion of seismic travel times and gravity data on 3D unstructured grids with application to mineral exploration, EGU General Assembly, Vienna, 2-7 May, 2010. [PDF file of talk (4.0M).]
Farquharson, C.G., 3-D finite-element modelling of magnetotelluric data with a static divergence correction, AGU-CGU-etc. Joint Assembly, Toronto, 24-27 May 2009. [PDF file of talk (1.4M).]
Mosher, C.R.W., C.G. Farquharson, and C.A. Hurich, Minimum-structure borehole gravity inversion, 78th Annual Meeting of the Society of Exploration Geophysicists, Las Vegas, Nevada, 9-14 November 2008.
Farquharson, C.G., Three-dimensional inversion of gravity data for blocky models using a minimum-structure algorithm and general measures, KEGS Workshop on Geophysical Inversion, Toronto, 3 March 2007. [PDF file of talk (800k).]
Miller, H.G., M.R. Ash, M. Wheeler, and C.G. Farquharson, Constrained inversion of gravity and magnetic data: a real time exploration tool?, KEGS Workshop on Geophysical Inversion, Toronto, 3 March 2007. [PDF file of talk (1.8M).]
Ash, M.R., M. Wheeler, H.G. Miller, C.G. Farquharson, and A.V. Dyck, Constrained three-dimensional inversion of potential field data from the Voisey's Bay Ni-Cu-Co deposit, Labrador, Canada, 76th Annual Meeting of the Society of Exploration Geophysicists, New Orleans, Louisiana, 1-6 October 2006. [PDF files 1 & 2 of poster (2.5 & 7.0M).]
Farquharson, C.G., Constructing piecewise-constant models in multi-dimensional minimum-structure inversions, 76th Annual Meeting of the Society of Exploration Geophysicists, New Orleans, Louisiana, 1-6 October 2006. [PDF file of talk (2.2M).]
Craven, J.A., C.G. Farquharson, R.L. Mackie, W. Siripunvaraporn, V. Tuncer, and M.J. Unsworth, A comparison of two- and three-dimensional modelling of audiomagnetotelluric data collected at the world's richest uranium mine, Saskatchewan, Canada, 18th International Workshop on Electromagnetic Induction in the Earth, El Vendrell, Spain, 17-23 September 2006. [PDF file of poster (1.9M).]
Farquharson, C.G., Blocky models in minimum-structure inversions, 18th International Workshop on Electromagnetic Induction in the Earth, El Vendrell, Spain, 17-23 September 2006. [PDF file of poster (0.5M).]
Burgi, H.A., and C.G. Farquharson. Modelling of induced polarization effects in time-domain electromagnetic data from a glacier in Svalbard, Norway, Annual Meeting of the Canadian Geophysical Union, Banff, Alberta, 14-17 May 2006. [PDF file of talk.]
Farquharson, C.G., and Ken Witherly. Quantitative interpretation of airborne and ground geophysical electromagnetic data for groundwater investigations, Annual Meeting of the Canadian Geophysical Union, Banff, Alberta, 14-17 May 2006. [PDF file of talk.]
Farquharson, C.G., D.W. Oldenburg and P. Kowalczyk. Three-dimensional inversion of magnetotelluric data from the Turquoise Ridge mine, Nevada, 74th Meeting of the Society of Exploration Geophysicists, Denver, Colorado, 10-15 October 2004.
Cristall, J., C.G. Farquharson and D.W. Oldenburg. Inversion of Airborne Electromagnetic Data: Application to Oil Sands Exploration, The 2004 Joint Assembly of the CGU, AGU, SEG and EEGS, Montréal, PQ, 17-21 May 2004. [PDF file of talk.]
Farquharson, C.G., K. Duckworth and D.W. Oldenburg. Comparison of integral equation and physical scale modelling of the electromagnetic response of models with large conductivity contrasts, Annual Meeting of the Canadian Geophysical Union, Banff, Alberta, 11-14 May 2003. [PDF file of talk.]
Farquharson, C.G., and D.W. Oldenburg. Constructing piece-wise-constant models using general measures in non-linear, minimum-structure inversion algorithms, 6th International Symposium of the Society of Exploration Geophysicists of Japan, Tokyo, 22-24 January 2003. [Expanded abstract.]
Farquharson, C.G., D.W. Oldenburg, E. Haber and R. Shekhtman. An algorithm for the three-dimensional inversion of magnetotelluric data, 72nd Meeting of the Society of Exploration Geophysicists, Salt Lake City, Utah, 6-11 October 2002. [PDF file of talk; expanded abstract.]

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Last update: 27th June 2014.