Rock Properties: (aka) Geology

Geophysical measurements are directly related to geology, mineralization and alteration and linked through physical rock properties.
Exploration is a feedback loop between geology, geochemistry and geophysics. It is a continual work in progress, refining our understanding of the sub-surface as we explore for mineral deposits.
What are the defining characteristics of the target model in terms of physical rock properties?
Do all lithologies have contrasts?
How is the geology represented as physical rock properties? Think of geophysical rock property geology as much simpler than typical geology.
Is your target amenable to direct geophysical detection (i.e. VMS conductive target) or would geologic mapping be the driver to further exploration?
Successful geophysical surveys require that physical rock property contrasts be large enough to be measurable from either ground or airborne surveys. Target size, depth, geometry and amplitude of rock property contrast are key factors in detectability.

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