Nice stuff, Pin. Really helpful in trying to understand what's happening up north.
I'm certainly not a geologist so I had to look up the definition of TDEM:
| TIME DOMAIN ELECTROMAGNETICS |
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Time-Domain ElectroMagnetic (TDEM) methods are based on the principle of using electromagnetic induction to generate measurable responses from sub-surface features. When a steady current in a cable loop is terminated a time varying magnetic field is generated. As a result of this magnetic field, eddy currents are induced in underground conductive materials. The decay of the eddy currents in these materials is directly related to their conductive properties, and may be measured by a suitable receiver coil on the surface.
I picked this definition up from: http://www.fugroground.com/products&services/acquisition/TDEM%20Time%20Domain%20Electromagnetics.html
Snug
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