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    The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected 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. This radiometric potassium grid has a cell size of 0.00083 degrees (approximately 91m) and shows potassium element concentration of the Hann River-Walsh merge, 1991 in units of percent (or %). The data used to produce this grid was acquired in 1991 by the QLD Government, and consisted of 61810 line-kilometres of data at 400m line spacing and 100m terrain clearance.

  • Categories  

    The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected 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. This radiometric thorium grid has a cell size of 0.00083 degrees (approximately 91m) and shows thorium element concentration of the Hann River-Walsh merge, 1991 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1991 by the QLD Government, and consisted of 61810 line-kilometres of data at 400m line spacing and 100m terrain clearance.

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    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. This Hann River Walsh magnetic grid geodetic has a cell size of 0.00083 degrees (approximately 91m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 1991 by the QLD Government, and consisted of 61810 line-kilometres of data at 400m line spacing and 100m terrain clearance.

  • Categories  

    The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected 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. This radiometric uranium grid has a cell size of 0.00083 degrees (approximately 91m) and shows uranium element concentration of the Hann River-Walsh merge, 1991 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1991 by the QLD Government, and consisted of 61810 line-kilometres of data at 400m line spacing and 100m terrain clearance.

  • Survey conducted by the Commonwealth Government or State/Territory Geological Survey (or equivalent) collecting airborne geophysical data

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    Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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. This Moree-St George-Tharg-Nocundra, Gravity (P196210) contains a total of 1 point data values acquired at a spacing of None metres. The data is located in QLD and were acquired in 1962, under project No. 196210 for None.

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    Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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. This National Mapping Helicopter Gravity, Height Survey (P196211) contains a total of 633 point data values acquired at a spacing of 11265 metres. The data is located in NSW, QLD and were acquired in 1962, under project No. 196211 for Australian Survey Office (National Mapping); Bureau of Mineral Resources (BMR).

  • Categories  

    Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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. This Kings Plain Gravity (P196215) contains a total of 914 point data values acquired at a spacing of 31 metres. The data is located in QLD and were acquired in 1962, under project No. 196215 for Bureau of Mineral Resources (BMR).

  • Categories  

    Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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. This Helicopter Gravity (Contract) (P196304) contains a total of 2223 point data values acquired at a spacing of 11000 metres. The data is located in QLD and were acquired in 1963, under project No. 196304 for Bureau of Mineral Resources (BMR).

  • Categories  

    Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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. This Rockhampton Downs-Townsville-Tennant Creek, Gravity (P196305) contains a total of 714 point data values acquired at a spacing of 7000 metres. The data is located in NT, QLD and were acquired in 1963, under project No. 196305 for Bureau of Mineral Resources (BMR).