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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 West Murchison Gravity Survey (P201260) contains a total of 11816 point data values acquired at a spacing of 2500 metres. The data is located in WA and were acquired in 2012, under project No. 201260 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 East Amadeus Gravity Survey, 2012 (P201280) contains a total of 7565 point data values acquired at a spacing between 1000 and 4000 metres. The data is located in NT and were acquired in 2012, under project No. 201280 for Northern Territory of Australia (Northern Territory Geological Survey).

  • 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 Yathong Trough Seismic Lines Gravity (P201320) contains a total of 579 point data values acquired at a spacing of 400 metres. The data is located in NSW and were acquired in 2013, under project No. 201320 for Terrex Pty Ltd.

  • 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 Ardlethan Gravity Survey (P201321) contains a total of 1321 point data values acquired at a spacing between 500 and 2000 metres. The data is located in NSW and were acquired in 2013, under project No. 201321 for Geological Survey of New South Wales (GSNSW).

  • 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 Riverina Gravity Survey (P201322) contains a total of 18234 point data values acquired at a spacing between 100 and 2000 metres. The data is located in NSW and were acquired in 2013, under project No. 201322 for Geological Survey of New South Wales (GSNSW).

  • 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 Australia Wide AFGN Absolute 2016 (P201691) contains a total of 21 point data values acquired at a spacing of 750 metres. The data is located in ACT, NSW, NT, QLD, SA, TAS, VIC, WA and were acquired in 2016, under project No. 201691 for Geoscience Australia.

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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 Gravity along seismic Gawler Curnamona Link Line, 09GA-CG1 (P200950) contains a total of 359 point data values acquired at a spacing between 320 and 480 metres. The data is located in SA and were acquired in 2009, under project No. 200950 for Geoscience Australia.

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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 Emu Creek Gravity (P199242) contains a total of 54 point data values acquired at a spacing between 1000 and 15000 metres. The data is located in QLD and were acquired in 1992, under project No. 199242 for RGC Exploration Pty Ltd.

  • Australia's Identified Mineral Resources is an annual nation-wide assessment of Australia's ore reserves and mineral resources.

  • Although the time-averaged shear-wave velocity down to 30 m depth (Vs30) can be a proxy for estimating earthquake ground-motion amplification, significant controversy exists about its limitations when used as a single parameter for the prediction of amplification. We make an extensive use of different methodologies as blind comparisons in order to question the applicability of amplification factor as defined by Vs30, for 30 sites in the Newcastle area, Australia. The multi-method approach includes past seismic cone penetrometer (SCP) and spectral analysis of surface waves (SASW), with newly acquired horizontal-to-vertical spectral ratio (H/V), passive source surface-wave spatial autocorrelation (SPAC), refraction microtremor (ReMi) and multichannel analysis of surface waves (MASW) data. We show that Vs30 can be related with spectral response but not necessarily with the maximum amplification. Transition zones within the geological boundaries may be important factors affecting site effects. Both Vs30 and amplification factor (AF) values are influenced by the velocity ratio between bedrock and overlying sediments and the presence of surficial thin low velocity layers (STL) (< 2m thick and < 150 m/s), but the velocity ratio is what affects mostly the AF. At 0.2 < T < 0.4 s, the AFs are largely influenced by surficial geology. For T > 0.5 s, amplification curves follow the order expected for hard to soft site classes. The SPAC and ReMi techniques have the smallest deviation from the average for all sites, corresponding to a factor of < 0.5 for > 75% of the data.