Geophysical Survey - Magnetic

Magnetic Surveying measures variations in the Earth's magnetic field generated by differences in sub-surface rock magnetic susceptability. Applications of magnetic surveys have a broad range of applications including geological, civil and archaeological.

Identifiable Features

The use of Magnetic Geophysical surveys is a widely used technique due to its speed of acquisition and lower cost. Magnetic Surveys can provide;
  • Palaeochannels containing tertiary basalt can be identified, extent mapped and an estimate of thickness obtained.
  • Delineate dyke, sill & massive intrusives.
  • Large scale basement fracture and fault systems that alter the basin floor can be mapped.
  • Smaller scale fracture and fault systems that cross magnetically inductive bodies, such as sills can be identified.
  • Magnetically inductive ore bodies can be easily identified.
GeoConsult Acquisition
  • Good start to exploration; low impact - easier land access, use of existing infrastructure,      small team, relatively low cost & quick.
  • Provision of all field equipment, personnel and procedures to match the scale of the target.
  • Acquisition process from survey design, trial survey’s to field data collection processing & storage.
  • Latitude/Inclination adjustments to the geomagnetic field.
  • Di-urnal variation, geomagnetic, elevation & Terrain corrections.
  • Geophysical corrections and modelling.
  • Can be run in conjunction with gravity and TSIM surveying to increase interpretation reliability.
  • Professional reporting on nature of recorded magnetic anomalies.

GeoConsult provides a complete service from survey planning and design, access to the survey equipment, data acquisition, interpretation and professional reporting.

16 Magnetic Survey 20120223.pdf

Rockhampton-Monto High Density Total Magnetic Intensity Survey

G-859 Geometrics Magnetometer (left) & its use in the field (right).