From 1 - 10 / 842
  • The Layered Geology of Australia web map service is a seamless national coverage of Australia’s surface and subsurface geology. Geology concealed under younger cover units are mapped by effectively removing the overlying stratigraphy (Liu et al., 2015). This dataset is a layered product and comprises five chronostratigraphic time slices: Cenozoic, Mesozoic, Paleozoic, Neoproterozoic, and Pre-Neoproterozoic. As an example, the Mesozoic time slice (or layer) shows Mesozoic age geology that would be present if all Cenozoic units were removed. The Pre-Neoproterozoic time slice shows what would be visible if all Neoproterozoic, Paleozoic, Mesozoic, and Cenozoic units were removed. The Cenozoic time slice layer for the national dataset was extracted from Raymond et al., 2012. Surface Geology of Australia, 1:1 000 000 scale, 2012 edition. Geoscience Australia, Canberra.

  • The Vlaming Sub-Basin CO2 Storage Potential Study web service includes the datasets associated with the study in the Vlaming Sub-basin, located within the southern Perth Basin about 30 km west of Perth. The data in this web service supports the results of the Geoscience Australia Record 2015/009 and appendices. The study provides an evaluation of the CO2 geological storage potential of the Vlaming Sub-basin and was part of the Australian Government's National Low Emission Coal Initiative.

  • This web service delivers metadata for onshore active and passive seismic surveys conducted across the Australian continent by Geoscience Australia and its collaborative partners. For active seismic this metadata includes survey header data, line location and positional information, and the energy source type and parameters used to acquire the seismic line data. For passive seismic this metadata includes information about station name and location, start and end dates, operators and instruments. The metadata are maintained in Geoscience Australia's onshore active seismic and passive seismic database, which is being added to as new surveys are undertaken. Links to datasets, reports and other publications for the seismic surveys are provided in the metadata.

  • <div>The Vlaming Sub-Basin CO2 Storage Potential Study data package includes the datasets associated with the study in the Vlaming Sub-basin, located within the southern Perth Basin about 30 km west of Perth. The data in this data package supports the results of the Geoscience Australia Record 2015/009 and appendices. The study provides an evaluation of the CO2 geological storage potential of the Vlaming Sub-basin and was part of the Australian Government's National Low Emission Coal Initiative.</div>

  • Multi-decadal archives of satellite imagery and rapidly growing volumes of newly acquired Earth observation (EO) data provide the opportunity to monitor and assess changes to the Earth’s surface in a systematic way. However, many satellite data users need to invest substantial time and effort into data preparation that is typically done in desktop environments, which limits effective utilisation and subsequently the societal benefit that could be realised from the datasets. There is a growing trend among satellite data providers to handle more of such data preparation work and provide Analysis Ready Data (ARD) as a standard product package for EO data to make it more accessible and useful to a wider user base. ARD are satellite data that have been processed to a minimum set of requirements and organised into a form that allows immediate analysis with a minimum of additional user effort and interoperability both through time and with other datasets. Although definitive specifications for different families of ARD products are currently being developed by Committee on Earth Observation Satellites (CEOS), through the CEOS Analysis Ready Data for Land (CARD4L) framework, the effective utilisation and interoperability of cross-provider and cross-sensor ARD products may still pose challenges. The interoperability between ARD products will be critical for the effective user uptake of the multiple data streams. Identifying the common set of properties required for multi-sensor interoperability and assessment of the impact of parameters used in the corrections applied to derive ARD products, are important steps in achieving interoperability between ARD products. Multiple aerosol and water vapour parameters covering a range of conditions, a range of BRDF shape parameters from typical land cover types, and different solar angle normalisations covering seasonal variations have been evaluated for their impact on the derived surface reflectance, an ARD product. The results from the sensitivity analyses will be highlighted in this paper. Presented at the 2019 ESA Living Planet Symposium, 13-17 May 2019 Milan, Italy

  • Here we present 3D and 2D resistivity models of the lithosphere beneath an area of southeast Australia, derived from Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) data and a subsequent infill broadband MT transect collected in October 2020. The Flinders Ranges, South Australia, is a zone that has been weakened by multiple Precambrian rift cycles related to the breakup of Rodinia, which may have led to the utilisation of this lithosphere for the focussing of fluid alteration causing high conductivities at crust and upper mantle depths in this region, as imaged in the AusLAMP 3D resistivity models. The northwestern end of a 100 km MT transect traverses this region and its 1.5 km MT site spacing resolves high conductivity pathways that broadly correlate with previously identified mineral prospects. These pathways straddle the resistive granodiorite rocks of the Anabama pluton, known to host porphyry-style mineralisation. To the southeast, the transect images the onlapping Mesozoic Murra Abstract presented at Australasian Exploration Geoscience Conference (AEGC), 15-17 September 2021, Brisbane, Australia

  • 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 Yathong Magnetic Gradient and Radiometric Survey, NSW, 2023, (P5023), Radiometric Line Data - Reduced were acquired in 2023 by the NSW Government, and consisted of 65504 line-kilometres of data at 200m line spacing and 80m terrain clearance.

  • The Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) is an Australia-wide program to map the electrical resistivity structure of the Australian lithosphere in three dimensions. The aim of the program is to deliver long-period magnetotelluric data on a 0.5 degree (~55 km) grid across Australia. Data and models produced from this program will provide new insight into Australia’s lithospheric architecture and tectonic processes, and help to reduce exploration risk. Geoscience Australia is a key player in the delivery of the AusLAMP program, which is now around 30 % complete. Geoscience Australia has recently released AusLAMP data from Victoria, which completes data collection in this state. To date, a further 100 sites have been collected in NSW and 155 in the Northern Territory, the latter as part of Geoscience Australia’s Exploring for the Future (EFTF) program. This presentation will show new data and models from each of these key areas. The implications of these results for our understanding of the deep resistivity structure of the Australian lithosphere and for mineral systems targeting will also be discussed. Presented at the Australian Geoscience Council Convention, 14-18 October 2018, Adelaide SA

  • Every day, humanity benefits from geodesy. Geodesy is the science of measuring the size, shape, orientation and gravity field of our planet and it is a foundation for evidence-based policies, decisions and program delivery. Geodesy is used every day, in the fields of civil engineering, industrial automation, agriculture, construction, mining, financial transactions, intelligent transport systems, disaster response and emergency management, environmental studies and scientific research. Furthermore, geodesy enables accurate collection, management and alignment of nationally integrated geospatial information – a key requirement for societal, environmental and economic activities, the measuring and monitoring of progress of the 2030 Agenda for Sustainable Development, the Sendai Framework for Disaster Risk Reduction, the Small Island Developing States Accelerated Modalities of Action (SAMOA) Pathway, and other global, regional and national development agenda and initiatives.

  • Survey FK200308 on the R/V Falkor undertook detailed mapping within two significant and biologically unexplored submarine canyons (Cape Range and Cloates Canyon) in the Gascoyne Marine Park. The Gascoyne Marine Park covers 81, 766 km2 adjacent to the Ningaloo Marine Park. The canyons form part of the habitat protection and multiple use zones of the marine park and are identified as Key Ecological Features. The canyons provide an important connection between the abyssal plain environments and the Commonwealth waters adjacent to Ningaloo Reef on the continental shelf. High productivity aided by upwelling through the canyons has been related to aggregations of whale sharks, manta rays, humpback whales, sea snakes, sharks, large predatory fish and seabirds. In addition, the hard canyon walls provide habitat for a range of sessile invertebrates, while the soft sediments on the canyon floor support a range of mobile invertebrates. The data from this survey will provide a comprehensive taxonomic survey to characterise the marine biodiversity of the canyons or to understand the distribution of canyon habitats in relation to the seabed morphology. The SuBastian ROV was used to acquire high-resolution video and collect samples. SuBastian is a custom-built work class ROV that conducts scientific work down to 4500m. It is equipped with a Sulis Subsea Z70 deep sea science camera with 4K UHD 2160p optics and sensors for temperature, depth, conductivity and oxygen. Twenty ROV dives were completed across 16 stations, and these included 12 quantitative imagery transects within the Cape Range Canyon. No quantitative transects were conducted in the Cloates Canyon. The quantitative transects were run for 500 m upslope, ideally at a speed of 0.3 knots and an altitude of 2 m above the seafloor or rock walls.