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GEOPHYSICAL METHOD - Coggle Diagram
GEOPHYSICAL METHOD
ELECTRICAL METHOD
DEFINITION
Electrical resistivity and its inverse, electrical conductivity, is a fundamental property of a material that quantifies how strongly it resists or conducts electric current
OBJECTIVE
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measure potentials, currents, and electromagnetic fields that occur naturally or are introduced artificially in the ground
DISADVANTAGES
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cultural problems cause interference such as power lines, pipelines, buried casing and fences
data acquisition can be slow compared to other geophysical methods, although that difference is dissappearing with the very latest techniques
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MAGNETIC METHOD
DEFINITION
A geophysical prospecting method that maps variations in the magnetic field of the Earth that are attributable to changes of structure or magnetic susceptibility in certain near-surface rocks
OBJECTIVES
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investigate subsurface geology on the basis of anomalies in the earth's magnetic field resulting from the magnetic properties of underlying rocks
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