Gravity is used for geological and structural reconnaissance to determine rock type, soil compaction, the presence of water and to create plausible deposit models: (greenstone belts, sedimentary basins, ultramafic rocks, granitic batholiths, karst, calderas, volcanic domes, structural corridors and faults).
Gravity is used for geological and structural mapping to directly delineate ore-bearing structures: (skarns, horsts, grabens, brecchias, silicification and alteration or intense fracture zones).
Gravity is used for the direct detection of either excess of mass: (massive sulphide deposits associated with nickel, chromite ore, banded iron formations, stock works, and barite deposits) or depletion of mass: (coal, lignite, salt deposits, placer, karst and kimberlites).
Gravity is used where seismic imaging has been challenged by complex geology, crew safety or practical inaccessibility. Gravity is used to map the subsurface structures under thick salt and in volcanic provinces where seismic methods have imaging problems.
Gravity is used to measure the density change in an oil reservoir assisting in the oil and gas estimate and recovery process.
Gravity is used for:
Magnetics are used to understand the general structure of underlying rock by identifying faults and folds otherwise hidden beneath the surface.
Magnetics are used to discover and evaluate the size and shape of ore bodies by mapping the magnetism of underlying rocks.
Magnetics are used to define deposits:
Iron ore, gold, copper, zinc, nickel, diamonds, chromite, manganese, asbestos.
Magnetics are used to determine depth to basement rocks and to locate and define the extent of sedimentary basins.
Magnetics are used to identify demagnetised rocks produced by the heat of geothermal activity; potential epithermal gold deposits.
IES conducts both ground and aerial (UAV) magnetic surveys.