VIC
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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. These line dataset from the Murrindal, Vic, 1996 VIMP Survey (GSV3060) survey were acquired in 1995 by the VIC Government, and consisted of 15589 line-kilometres of data at 200m line spacing and 80m 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.
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Tectono-geomorphic landscape features in Australia, many of which are neotectonic, can be interpreted in the context of long-term patterns of large earthquake occurrence, and used to inform contemporary earthquake hazard science. Such features often represent our only means of defining seismic source parameters such as fault slip-rate, large earthquake recurrence and magnitude. They therefore provide an avenue for extending the short historic catalogue of seismicity to timeframes commensurate with the slow strain accumulation rates characteristic of intraplate environments (Clark et al., 2012). In addition to supporting seismic hazard assessment, an analysis of tectono-geomorphic landscape evolution might also be used to inform studies in a range of other disciplines. Here we present the example of the Avonmore Scarp in the Campaspe River valley of north-central Victoria, a tectono-geomorphic (and neotectonic) feature which has implications not only for seismic hazard in central Victoria, but also for mineral and groundwater resources.
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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 Otway Basin Gravity PEP93 (P198045) contains a total of 495 point data values acquired at a spacing of 75 metres. The data is located in VIC and were acquired in 1980, under project No. 198045 for Western Mining Corporation Ltd.
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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 Stavely Gravity Traverses, 2016 (P201631) contains a total of 3564 point data values acquired at a spacing of 200 metres. The data is located in VIC and were acquired in 2016, under project No. 201631 for Geological Survey of Victoria (GSV).
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Gravity data measure 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 Gippsland Basin Gravity P201430 CSCBA267GU is a complete spherical cap Bouguer anomaly grid for the Gippsland Basin Gravity Survey (P201430). This gravity survey was acquired under the project No. 201430 for the geological survey of VIC. The grid has a cell size of 0.00501 degrees (approximately 497m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 1211 gravity stations were acquired to produce this grid.
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Gravity data measure 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 Gippsland Basin Gravity P201430 SCBA267GU is a complete Bouguer anomaly grid for the Gippsland Basin Gravity Survey (P201430) survey. This gravity survey was acquired under the project No. 201430 for the geological survey of VIC. The grid has a cell size of 0.00501 degrees (approximately 497m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 1211 gravity stations were acquired to produce this grid.
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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 Gippsland Basin Gravity Survey (P201430) contains a total of 1211 point data values acquired at a spacing of 500 metres. The data is located in VIC and were acquired in 2014, under project No. 201430 for Geological Survey of Victoria (GSV).
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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 South Gippsland 2D Seismic Gravity Traverese (P201530) contains a total of 529 point data values acquired at a spacing between 90 and 435 metres. The data is located in VIC and were acquired in 2015, under project No. 201530 for Geoscience Australia.
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This GA Record report is one of a series of 4 reports undertaken by the GA Groundwater Group under the National Collaboration Framework Project Agreement with the Office of Water Science (in the Department of the Environment). The report was originally submitted to the OWS in July 2013, and subsequently reviewed by the Victorian and South Australian governments. The Otway Basin is a priority coal-bearing sedimentary basin that is not currently slated for Bioregional Assessment programme research in the initial tranche of work.
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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 Western Victoria Region Gravity (P195602) contains a total of 32 point data values acquired at a spacing of 7000 metres. The data is located in VIC and were acquired in 1956, under project No. 195602 for None.