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.

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.

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>

Researchⁱ indicates that inclusive organisations that value diversity, including having gender diverse leadership teams, outperform those that don’t. Australian university science graduates reached gender parity over 20 years ago. Geoscience Australia (GA), however, continues to face the challenge of attaining greater gender equity across the organisation, and especially within its senior leadership. GA is committed to improving its performance in gender equity by creating a more inclusive workplace. GA has joined the pilot Athena SWAN program in Australia, run by SAGE (Science in Australia and Gender Equity). This framework of accreditation, based on the UK Athena SWAN Charter, is recognised as a comprehensive and practical scheme to improve scientists’ careers by addressing gender inequity. The Charter of 10 principles encourages institutions and public research organisations to commit to a progressive approach to policies, practices and actions to improve their culture thus creating and supporting a more diverse workplace. GA will submit an application in July 2019 for Bronze accreditation that will identify a set of actions to be implemented to address the gender equity challenges. We will continue to measure and analyse our data to determine if the actions are having a positive effect, thereby allowing us to build on improvements in creating a gender inclusive workplace and potentially enabling us to apply for Silver accreditation. ⁱ for example: Desvaux, Devillard, de Zelicourt, Kossoff, Labaye and Sancier-Sultan, Wood, McKinsey, Women Matter: Ten years of insights on gender diversity, 2017; University of Melbourne, Building a Business Case for Gender Diversity, 2013; Poster presentation for the Australian Geoscience Council Convention (AGCC) 2018

This Record details rhenium–osmium (Re–Os) dating of molybdenite separated from quartz veins associated with tungsten mineralisation at the Hit or Miss deposit of the Hatches Creek tungsten field, Warramunga Province. Two samples of molybdenite were collected from the former mine: sample FR17MVM001 as drill chips from a tungsten-mineralised quartz vein in drillhole HCRC021, and sample FR17MVM002 from a quartz vein in surface workings associated with tungsten and molybdenum. Molybdenite was dated to determine an absolute age for tungsten mineralisation at the deposit. The Re–Os molybdenite model ages obtained were 1677 ± 10 Ma and 1602 ± 9 Ma respectively. These ages are tentatively interpreted as mineralisation and/or remobilisation ages for molybdenum and tungsten, and the associated bismuth and copper at the Hit or Miss deposit; they also provide timing constraints on mineralisation in the wider Hatches Creek tungsten field. Low Re concentrations in the samples (1–2 ppm) are consistent with an evolved crustal source for the tungsten mineralisation. The older of the two Re–Os model ages is broadly consistent with previous age determinations for tungsten mineralisation and felsic intrusions in the Warramunga Province using Ar–Ar muscovite and U–Pb zircon dating methods. Although the geological significance of the new Re–Os molybdenite age is uncertain, the results are tentatively interpreted to record a protracted episode of tungsten, copper and molybdenum mineralisation in the Warramunga Province between ca 1700 –1600 Ma, associated with evolved felsic intrusions. <b>BIBLIOGRAPHIC REFERENCE: </b>McGloin MV, , Huston DH and Norman M, 2019. Summary of results. Re–Os molybdenite dating of the Hit or Miss deposit, Hatches Creek tungsten field, Warramunga Province. <i>Northern Territory Geological Survey</i>, Record 2019-010.

This compilation of gravity, magnetic and bathymetry ship-track line data, derived from the Geoscience Australia marine geophysical survey database 'Mardat', has been levelled in preparation for gridding. Data are included from Geoscience Australia geophysical surveys acquired since the 1970's as well as surveys from other institutions. The levelling process reduces mis ties between intersecting surveys of various vintages so that they can be integrated and represented as continuous surfaces. The compilation consists of time-indexed ASCII fixed format files organised by survey with a record spacing approximately 150m. Each survey file contains geographic coordinates and the potential field and bathymetry data, both unlevelled (source data as in Mardat) and levelled. The compilation does not include shot-indexed data as may be recorded on seismic reflection surveys. Note: The marine data was levelled by Desmond FitzGerald & Associates from 1998-2001, and Ron Hackney in 2009-2011. The final data were further reviewed by Yvette Poudjom Djomani prior to the release.

<div>The integrity and strength of multi-technique terrestrial reference frames, such as realisations of the International Terrestrial Reference Frame (ITRF), depend on the precisely measured and expressed local-tie connections between space geodetic observing systems at co-located observatories. Australia has several observatories which together host the full variety of space geodetic observation techniques, including Global Navigation Satellites Systems (GNSS), Very Long Baseline Interferometry (VLBI), Satellite Laser Ranging (SLR) and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) beacons.</div><div><br></div><div>This report documents the technical aspects of the local tie survey completed at the Mount Stromlo observatory, in Canberra in September 2018. The aim of the survey was to precisely measure the local terrestrial connections between the space-based geodetic observing systems co-located at the observatory, which include 3 International GNSS Service (IGS) stations (AU45&nbsp;A 50119M001, STR3&nbsp;A 50119M005 & STR1&nbsp;A 50119M002), SLR (7825&nbsp;A 50119S003) and DORIS (MSPB&nbsp;A 50119S004) infrastructure. </div><div><br></div><div>In particular, this report documents the indirect measurement of the SLR invariant reference point. Geoscience Australia has routinely performed classical terrestrial surveys at Mount Stromlo, including surveys in 1999, 2002 and 2003 (post-fire). A high precision survey was conducted between the survey pillars surrounding the SLR observatory. These survey pillars were monitored to ensure their stability as part of a consistent, stable terrestrial network from which local tie connections were made to the SLR and other observing systems. The relationship between points of interest included the millimetre level accurate connections and their associated variance covariance matrix.</div><div><br></div>

<div><strong>Conclusions</strong>&nbsp;</div><div><br></div><div>The NW NT Seismic Survey (L214) was designed to image the underexplored Proterozoic Birrindudu Basin and adjacent regions, including the highly prospective Tanami region. In an area of very limited seismic coverage, the acquisition of ~900km of deep crustal seismic data has vastly improved the seismic coverage through this region. &nbsp;The new dataset will be available as both raw and processed data files from the Geoscience Australia website in the future.</div><div><br></div>Abstract presented at the 2024 Annual Geoscience Exploration Seminar (AGES)

<div>Critical minerals are the minerals and elements essential for modern technologies, economies and national security. However, the supply chains of these minerals may be vulnerable to disruption thereby making the study of these minerals, from source to product, of primary importance. </div><div><br></div><div>The global transition to net-zero emissions is driving accelerated consumption of critical minerals, particularly driven by the increase in demand for technologies such as solar photovoltaics (PV) and semiconductors (Department of Industry, Science and Resources [DISR], 2022; 2023). In parallel, the phasing out of, for example, traditional machinery and manufacturing processes reliant on hydrocarbon resources (Ali et al., 2017; Bruce et al., 2021; International Energy Agency [IEA], 2021; 2023; Skirrow et al., 2013) is further adding to the global demand. High Purity Quartz (HPQ) forms just one of these critical minerals, and is the primary raw material for the production of High Purity Silica (HPS) and Silicon (Si) for use in products ranging from solar PVs to semiconductors. </div><div><br></div><div>The current list of minerals classified as critical is now up to 31 (Department of Industry, Science and Resources [DISR], 2022; 2023). This diversity of critical minerals is also promoting a new focus on the exploration for i) new styles of mineralisation that might host sufficient volumes of critical minerals, and ii) a re-examination of existing minerals systems knowledge in order to help mineral explorers make new discoveries to help support the increasing demand. </div><div><br></div><div>At present, the main global suppliers of HPQ are the United States, Canada, Norway, Brazil, Russia and India (Pan et al., 2022). In Australia, there has been a paucity of exploration and development of HPQ mineral deposits and, despite the potential that Australia holds for the exploration and discovery of potentially significant HPQ occurrences, Simcoa Operations Pty Ltd. (Figure 1) represents the only operator currently mining HPQ, and the only manufacturer of high purity silicon in Australia (Simcoa, 2020). </div><div><br></div><div>Australia is well-positioned to incentivise the exploration, discovery and supply of raw materials, and significantly expand onshore silicon production capacity (PricewaterhouseCoopers, 2022). Research presented here highlights the opportunity that Australia has in making a positive contribution to meeting the global demand for HPQ required for high-technology applications and the transition to a net zero economy.&nbsp;</div><div><br></div>Abstract presented at the 2024 Annual Geoscience Exploration Seminar (AGES)