URL: https://geoscience.data.qld.gov.au/dataset/mr010689
Aeromagnetics TMI with gradient - Map number 32 from the Atlas of North Queensland Geology 1:3 Million Scale Compiled by JHC Bain and JJ Draper in 1997. Map 32 Areomagnetics: TMI with gradient.
The land and near shore data are from surveys by BMR/AGSO with a flight line spacing of generally 1.5 to 3.2 km and a terrane clearance of 150 m. The continental shelf data are from airborne surveys by petroleum companies, with a flight-line spacing of 2 to 50 km. All data are available from the Australian National Magnetic Database of AGSO. The grids derived from the individual surveys have been joined at their margins; this gives good control for short wavelength anomalies, but anomalies of wavelength more than about 600 km are poorly controlled. This map shows observed total magnetic intensity, with the intensity due to the Earth's core removed. Note that the major high anomalies are associated with a low to the south due to the 54° dip of the earth's magnetic field. The warmer colours on this map represent crustal rocks with higher magnetite contents than those in areas with cooler colours. Imaging by P Wellman, GIS/cartography by M Peljo (AGSO).