|
Methods
|
|
Property
|
Parameter measured or calculated
|
Unit
|
Direct Prospecting
|
Prospecting
|
|
indirect
|
structural
|
|
Non directional methods
|
Radio Metric
|
Scintillometry
|
|
Gamma radiation
|
Shock/second
|
Ores of
|
Uranium
Thorium
Phosphate
|
Clays & granites
|
X
|
|
Monazite
|
X
|
|
Spectrometry
|
|
density
|
acceleration of gravity
|
milligal (mgal)
|
Massive sulphides - Magnetite - Chromite - Barite - Coal
|
Cupolas
|
X
|
|
|
Gravimetry
|
|
|
|
Magnetism
|
Magnetic Susceptivit y
|
Magnetic field
|
gamma (7) nanotesia
(nt)
|
Magnetite, Pyrrhotite Chromite, Ilmenite
|
X
|
|
Electric
|
Self potential
(SP)
|
conductivit y and redos potential
|
potential difference
|
milivolt
(mV)
|
Massive sulphides - graphite
|
|
X
|
|
Prolongation of productive mineralizations
|
|
|
Directional methods
|
Resistivity
|
Sections & maps
|
Conductivit y
|
apparent resistivity
|
ohm-meter
|
Ores
|
conductiv e resistant
|
and lodes
|
Faults
|
X
|
|
Electric “drilling”
|
Roofs of ore bodies
|
conductive resistant
|
|
X
|
|
Induced Polarization
|
Time-domain
|
chargeability (+resistivity) polarizability
|
millisecond
(ms)
|
Disseminated sulphides
Clays - Bausite - Chromite
|
Faults
|
|
|
Electro
Magnetic
|
Electromagnetism
|
Sections & maps
|
Conductivit y
|
Many parameters: amplitude & phase of field, angle of tilt, lengthening of ellipse of polarization. Components in phase & in quadrature
|
Conductive ores & lodes
|
Faults
|
X
|
|
Frequency domain
|
|
|
|
Magnetotelluric
|
Section & maps
|
Faults
|
X
|
|
Seismic
|
Retraction
|
Elasticity
|
velocity of waves
|
second & meter/second
(m/s)
|
Salt domes
|
Structures
|
X
|
|
Reflection
|
X
|
