STAG3104_IP&Resistivity

What is the primary purpose of using the induced polarization (IP) method in mineral exploration?

• To measure magnetic fields

• To detect electrical resistivity

• To identify subsurface mineral deposits

• To determine groundwater levels

Which type of current is used in the induced polarization (IP) method?

• Alternating current (AC)

• Direct current (DC)

• Both AC and DC

• Pulsating current

Which mineral is commonly associated with high IP responses?

• Quartz

• Pyrite

• Calcite

• Feldspar

In a resistivity survey, what is the primary measurement taken?

• Magnetic field strength

• Electrical potential difference

• Seismic wave velocity

• Gravitational acceleration

What type of subsurface feature is typically indicated by high resistivity values?

• Clay-rich layers

• Metallic ore bodies

• Saturated soils

• Dry, consolidated rock

Which parameter is derived from the ratio of the observed potential difference to the injected current in IP surveys?

• Resistivity

• Chargeability

• Magnetic susceptibility

• Density

In the frequency-domain IP method, what is the key measurement taken?

• Phase shift between current and voltage

• Amplitude of the voltage

• Decay time of the voltage

• Speed of the current

What is the main advantage of the IP method over other geophysical methods?

• It is faster

• It can detect non-metallic minerals

• It provides information about the mineralization and its quantity

• It requires less equipment

Which factor does NOT significantly affect the resistivity of subsurface materials?

• Temperature

• Mineral composition

• Water content

• Ambient air pressure

In the context of resistivity surveys, what is meant by 'apparent resistivity'?

• The actual resistivity of a specific layer

• The resistivity measured at a specific point

• An average resistivity value over a given volume of subsurface materials

• The resistivity calculated from the current and voltage measurements without correction