Case Histories¶
Case histories provide the context for our development of educational and research material presented in em.geosci. Each case history focuses upon a particular problem to be solved and provides the motivation for working with particular surveys and shows the effectiveness of electromagnetics in answering the posed questions. For many people, a case history will be the entry point to this site. To facilitate transfer of knowledge we have developed a common framework (Seven Step Process) in which each case history is presented. Links are provided so that a reader can investigate fundamental aspects of EM, the survey, or interpretation. In some cases we are able to provide data sets and analysis/inversion software to enhance the user experience and to address important issues regarding reproducability. Case histories for our initial launch of em.geosci are those that have been developed by past and present students at the Geophysical Inversion Facility. The titles, and EM systems used are provided below.
Gallery¶
Albany¶

- Airborne and Ground Time-Domain EM results from the Albany Graphite Discovery
- Contributors
- author: Jean Legault, Josh Lymburner, Kevin Ralf, Peter Wood, Marta Orta, Alexander Prikhodko, Nasreddine Bournas, Stanislawa Hickey
- reviewer: Devin C. Cowan
- Tags
- Geophysical Surveys: Airborne TDEM, ground-based TDEM, aeromagnetic
- Applications: Mineral exploration, hydrothermal graphite porphyry
- Keywords: Mineral exploration, airborne, ground-based, TDEM, porphyry
- Location: Albany graphite deposit, Ontario, Canada
Aspen¶

- From exploration to reclamation: using EM methods at SAGD sites in the Athabasca oil sands
- Contributors
- author: Sarah G. R. Devriese
- Tags
- geophysical survey: Airborne TDEM
- application: Hydrocarbons
- keyword: Oil Sands
- location: Canada
Balboa¶

- The Balboa ZTEM Cu-Mo-Au porphyry discovery at Cobre Panama
- Contributors
- author: Jean Legault, Chris Wijns, Carlos Izarra, Geoffrey Plastow
- reviewer: Seogi Kang, Douglas Oldenburg, Lindsey J. Heagy
- Tags
- geophysical survey: Airborne NSEM
- application: Mining
- keyword: ZTEM, porphyry, copper, gold
- location: Panama
Barents Sea¶

- Reservoir properties prediction using CSEM, pre-stack seismic and well log data: Case Study in the Hoop Area, Barents Sea, Norway
- Contributors
- author: Pedro Alvarez, Amanda Alvarez, Lucy Macgregor, Fransisco Bolivar, Rob Keirstead, Thomas Martin
- reviewer: Devin C. Cowan
- Tags
- Geophysical Surveys: CSEM, 2D seismic
- Applications: Reservoir characterization, marine EM
- Keywords: Hydrocarbon, CSEM, reservoir, oil and gas
- Location: Hoop Fault Complex, Barents Sea, Norway
Bookpurnong¶

- Spatially constrained inversion for quasi 3D modelling of airborne electromagnetic data - an application for environmental assessment in the Lower Murray Region of South Australia
- Contributors
- author: Dikun Yang
- Tags
- geophysical survey: Airborne FDEM, Airborne TDEM
- application: Groundwater
- location: Australia
DO-27/DO-18 (TKC)¶

- Inversion of airborne geophysics over the DO-27/DO-18 kimberlites (TKC)
- Contributors
- author: Dom Fournier, Sarah G. R. Devriese, Seogi Kang
- Tags
- Geophysical Surveys: Airborne/ground gravity, Airborne magnetics, Airborne FEM, Airborne TEM
- Applications: Diamond exploration
- Keywords: Kimberlite, Diamond, Petrophysics
- Location: Northwest Territories,Canada
Elevenmile Canyon¶

- Three-Dimensional Inversion of ZTEM Data at the Elevenmile Canyon Geothermal System, Nevada
- Contributors
- author: Sarah G. R. Devriese
- Tags
- geophysical survey: Airborne NSEM
- application: Geothermal
- location: United States of America
- keyword: ZTEM
Furggwanghorn¶

- 3D Helicopter GPR surveying a rock glacier
- Contributors
- author: Alan G. Green, Kaspar Merz, Hansruedi Maurer
- reviewer: Seogi Kang, Douglas Oldenburg
- Tags
- geophysical survey: GPR
- application: Geotechnical
- location: Switzerland
Kasted¶

- 3D geological modelling of a complex buried-valley network delineated from borehole and AEM data
- Contributors
- Tags
- Geophysical Surveys: Airborne TDEM
- Applications: Groundwater Mapping
- Keywords: Airborne TDEM, Groundwater
- Location: Aarhus, Denmark
Lalor¶

- 3D inversion of total magnetic intensity data for time-domain EM at the Lalor massive sulphide deposit
- Contributors
- author: Douglas Oldenburg, Dikun Yang
- reviewer: Devin C. Cowan
- Tags
- Geophysical Surveys: Airborne TDEM
- Applications: Mineral exploration
- Keywords: Airborne TDEM, massive sulphide
- Location: Lalor Lake, Manitoba, Canada
Mt. Isa¶

- 2-D and 3-D IP/resistivity for the interpretation of Isa-style targets
- Contributors
- author: Dom Fournier
- Tags
- geophysical survey: DC, IP
- application: Mining
- location: Australia
Noranda¶

- 3D inversion of natural source electromagnetic data
- Contributors
- author: Elliot Holtham
- reviewer: Sarah G. R. Devriese
- Tags
- geophysical survey: ZTEM
- application: Mineral deposits
- keyword: Noranda
- location: Canada
Norsminde¶

- Assessment of near-surface mapping capabilities by airborne transient electromagnetic data - an extensive comparison to conventional borehole data
- Contributors
- author: Esben Auken, Anders Vest Christiansen, Cyril Schamper, Flemming J⌀rgensen, Flemming Effers⌀
- reviewer: Devin C. Cowan
- Tags
- Geophysical Surveys: Airborne TDEM
- Applications: Groundwater Mapping
- Keywords: Airborne TDEM, Groundwater
- Location: Norsminde, Denmark
SAGD¶

- Detecting and imaging time-lapse conductive changes using electromagnetic methods
- Contributors
- author: Sarah G. R. Devriese
- Tags
- geophysical survey: Borehole EM
- application: Hydrocarbons
- keyword: Oil Sands
- location: Canada
Saurashtra¶

- Exploration with Controlled Source Electromagnetics Under Basalt Cover in India
- Contributors
- reviewer: Devin C. Cowan, Douglas Oldenburg
- Tags
- geophysical survey: LOTEM
- application: Hydrocarbon
- keyword: LOTEM, Hydrocarbon
- location: Saurashtra Peninsula, India
Wadi Sahba¶

- High-resolution velocity modeling by seismic-airborne TEM joint inversion: A new perspective for near-surface characterization
- Contributors
- author: Daniele Colombo
- reviewer: Devin C. Cowan, Douglas Oldenburg, Seogi Kang, Lindsey J. Heagy
- Tags
- geophysical survey: Seismic, ATEM
- application: Hydrocarbon
- keyword: Wadi Sahba, Multi-physics, Joint Inversion
- location: Arabian Gulf, Qatar
Red Sea¶

- Application of Magnetotelluric and Controlled-Source Electromagnetic Methods for Subsalt Structure Imaging in the Red Sea
- Contributors
- author: Daniele Colombo
- reviewer: Devin C. Cowan, Douglas Oldenburg
- Tags
- geophysical survey: WAZ, CSEM, MT, Gravity
- application: Hydrocarbon
- keyword: Red Sea, Multi-physics, Data-Driven Inversion, Model-Driven Inversion
- location: Northern Arabian Gulf
West Plains¶

- A review of time and frequency domain airborne electromagnetic data sets over the West Plains orogenic gold region of the Committee Bay Greenstone Belt
- Contributors
- author: Douglas Oldenburg, Dikun Yang
- reviewer: Devin C. Cowan
- Tags
- Geophysical Surveys: VTEM, RESOLVE
- Applications: Mineral exploration
- Keywords: Airborne EM, orogenic gold, greenstone belt
- Location: Nunavut, Canada