From 1 - 10 / 1916
  • Legacy product - no abstract available

  • These data represent the grid of the Magnetic Anomaly Map of Australia (third edition). This grid was compiled from 9 million line-kilometres of TMI data held in the National Airborne Geophysics Database. The data were collected in surveys conducted by Geoscience Australia and by airborne geophysical companies operating under contracts to Geoscience Australia and State and Territory Geological Surveys, either separately or in joint projects. Data from a number of other surveys, carried out for private companies, were acquired by Geoscience Australia. These datasets contain anomalies with wavelengths as small as 800 m.

  • TMI - Psudocolor image of residual anomalies

  • Legacy product - no abstract available

  • Non standard map includes all of the Sale 1:250 000 map and parts of the adjoining 1:250 000 maps to the north and south of the Sale Sheet. Contour interval is 2 nT.

  • 22-1/F54-3/1 Contour interval = 2

  • Categories  

    Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. These line dataset from the Darling Basin(Milparinka,Urisino),NSW, 1981 survey were acquired in 1981 by the NSW Government, and consisted of 15669 line-kilometres of data at 3000m line spacing and 150m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.