2020
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Geoscience Australia’s annual contribution to the newsletter of the Australasian Palaeontologists - Nomen Nudum
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A probabilistic tsunami hazard assessement (PTHA) was developed for the island of Tongatapu, All modelled tsunamis were initiated by hypothetical thrust earthquakes on the nearby Kermadec-Tonga subduction zone. We provide raster outputs containing the inundation depth with an estimated 10% and 2% chance of being exceeded in 50 years, as well as the code used to perform the analysis [both available here: https://github.com/GeoscienceAustralia/ptha/tree/master/misc/probabilistic_inundation_tonga2020].
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The Exploring for the Future program is an initiative by the Australian Government dedicated to boosting investment in resource exploration in Australia. As part of the Exploring for the Future program, this study aims to improve our understanding of the petroleum resource potential of northern Australia. This data release presents newly derived chemical maturity parameters based on Fourier transform-ion cyclotron resonance-mass spectrometry (FT-ICR-MS) analysis of non-polar (polyaromatic hydrocarbons) and polar (NSO) compounds. As such, it complements optical and bulk chemical techniques. Although, only a single core extract was analysed in this study, the technique offers potential for maturity assessments in high maturity samples outside the range of other traditional chemical maturity estimates and is ideally suited to samples older than the Early Palaeozoic.
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The Meteorite Self Check List is a flowchart aimed to provide Client Visitor Services and the Collections team a resource to direct external clients towards, when they believe that they have found a meteorite. This resource will streamline and improve engagement with clients, and allow them a clear and friendly way to perform basic and effective tests/observations to their specimen, to determine if it is likely a meteorite.
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Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This Coober Pedy - ground elevation geoid grid (radar) is elevation data for the Coober Pedy West Airborne Magnetic Radiometric and DEM Survey, SA, 2017. This survey was acquired under the project No. 1299 for the geological survey of SA. The grid has a cell size of 0.0004 degrees (approximately 42m). This grid contains the ground elevation relative to the geoid for the Coober Pedy West Airborne Magnetic Radiometric and DEM Survey, SA, 2017. It represents the vertical distance from a location on the Earth's surface to the geoid. The data are given in units of meters. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
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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 Arunta Gravity Bouguer Anomaly is a complete Bouguer anomaly grid for the East Arunta (P200680). This gravity survey was acquired under the project No. 200680 for the geological survey of NT. The grid has a cell size of 0.00376 degrees (approximately 400m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 5231 gravity stations were acquired to produce this grid.
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Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This Cooper Basin North Gravity Elevation geodetic is elevation data for the Cooper Basin North Gravity Survey, Queensland 2007 (P200701). This survey was acquired under the project No. 200701 for the geological survey of QLD. The grid has a cell size of 0.0075 degrees (approximately 796m). This grid contains the ground elevation relative to the geoid for the Cooper Basin North Gravity Survey, Queensland 2007 (P200701). It represents the vertical distance from a location on the Earth's surface to the geoid. The data are given in units of meters. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
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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 Cooper Basin North Complete Gravity Bouguer Anomaly 1VD geodetic is a complete Bouguer anomaly grid for the Cooper Basin North Gravity Survey, Queensland 2007 (P200701). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. This gravity survey was acquired under the project No. 200701 for the geological survey of QLD. The grid has a cell size of 0.0075 degrees (approximately 796m). A total of 3550 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 South West NSW Complete Bouguer Gravity geodetic is a complete Bouguer anomaly grid for the Far South West NSW Gravity Survey, 2007 (P200720). This gravity survey was acquired under the project No. 200720 for the geological survey of NSW. The grid has a cell size of 0.0074 degrees (approximately 748m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 3519 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 Thomson Gravity Complete Bouguer Gravity geodetic is a complete Bouguer anomaly grid for the Thomson NSW Gravity Survey, 2007 (P200721). This gravity survey was acquired under the project No. 200721 for the geological survey of NSW. The grid has a cell size of 0.0037 degrees (approximately 384m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 4728 gravity stations were acquired to produce this grid.