b'AEGC 2023Short abstractsThese approaches generate large volumes of data, processing,Geomagnetic storms induce electric currents in the Earth that management and interpretation of which has been an obstaclefeed into power lines through substation neutral earthing, to their application. Cloud computing technologies providecausing instabilities and sometimes blackouts in electricity the infrastructure needed to effectively distil and communicatetransmission systems. Power outages to business, financial information meeting stakeholder needs. and industrial centres cause major disruption and potentially billions of dollars of economic losses. The intensity of Data analysis and interpretation of well logs in NDIgeomagnetically induced currents is closely associated with geological structure.Carrara 1, Northern Territory.Geomagnetic storm events across three decades have been Liuqi Wang , Adam Bailey, Emmanuelle Grosjean, Chris Carson,analysed to develop a statistical model of geomagnetic storm Lidena Carr, Grace Butcher, Christopher Boreham, Chris Southbyactivity in Australia and the model used to predict the intensity and Paul Henson of geomagnetically induced currents in Australias modern-Geoscience Australia day power grids. Modelling shows the induced electric fields in South Australia, Victoria and New South Wales caused by The recently drilled deep stratigraphic drill hole NDI Carraraan intense magnetic storm that occurred in 1989. Real-time 1 penetrates the water-bearing, carbonate reservoirs of theforecasting of geomagnetic hazards using Geoscience Australias Cambrian Georgina Basin as well as the underlying Proterozoicgeomagnetic observatory network and magnetotelluric data successions of the Carrara Sub-basin. The Proterozoicfrom the Australian Lithospheric Architecture Magnetotelluric interval consists predominantly of tight shales, siltstones,Project (AusLAMP) helps develop national strategies and risk and calcareous clastic rocks. This study aims to assess theassessment procedures to mitigate space weather hazard.petrophysical properties of the Proterozoic shales using conventional wireline logs.Gamma ray and neutron-density crossplot were used toAusGeochem data platform: Easily visualise and calculate shale volume (V shale ), and neutron-density crossplotsynthesise data for exploration.was applied to compute the total and effective porosity ofBryant Ware 1, Fabian Kohlmann2, Alexander Prent1, Samuel the non-shale rocks. Total organic carbon (TOC) content wasBoone3, Hayden Dalton3, Yoann Greau4, Alanur Halimulati4, Brent interpreted from well logs using artificial neural networks, andMcInnes1, Andrew Gleadow3 and Barry Kohn3the volume of organic matter was converted from TOC (wt%). Bulk density logs were corrected by removing the kerogen1 John de Laeter Centre, Curtin University effect in the organic-rich shales. Grain (matrix) and kerogen2 Lithodat Pty Ltddensities were obtained by correlating the reciprocal of grain3 University of Melbourne density with TOC content from laboratory measurements. Shale4 Macquarie Universitytotal porosity was interpreted from kerogen-corrected densityWith the development of the AusGeochem platform, the logs. Effective porosity was estimated from kerogen-correctedAuScope Geochemistry laboratory Network (AGN) and total porosity by removing the shaliness effect. Water saturationcollaborator Lithodat Pty Ltd facilitate better organisation, was estimated from V shale , porosity and resistivity logs. coordination and sharing of data produced by Australian The results of these log interpretations of shales weregeochemistry laboratories with the resource industry summarised with the integrations of mudlog gas and TOCcommunity. AusGeochem will provide a powerful multi-profiles. Of particular interest is the Lawn Hill Shale interval,purpose geochemistry research and exploration tool to which has an average total shale porosity of ~3% with abecome a key resource in quantitatively understanding maximum value of ~6% alongside a water saturation of lessEarth system processes, utilising world-class data produced than 100% and an average TOC of 1 wt% with a maximumby Australian geochemistry laboratories and facilitating measured value of ~4 wt%. Net shale thickness is about 120collaborations with the resource industry.m when calculated for shale with TOC 1 wt%. Shale units with interpreted high porosity and TOC correspond withWhen an industry collaborator approaches an Australian elevated methane peaks recorded on mudlog gas profiles.laboratory facility to obtain geochemical data, AusGeochem These Proterozoic shale intervals represent a highly prospectivecan be used first to search the area of interest for existing potential shale gas resource with both favourable free andpublicly available data. The data and sample location can then adsorbed gas contents. be interrogated through an array of easy to use visualisation and analytic tools that include toggling between different map layers (gravity, magnetics, geology) and plotting data Understanding space weather hazard in Australia usingon the fly, setting up a more informed inspection of existing geomagnetic and magnetotelluric data. geochemical data and allowing users to target the best geochemical tool for their specific need. When analytical Liejun Wang, Andrew Lewis, Bill Jones, Matthew Gard, Jingmingdata generation is underway, users upload sample metadata Duan and Adrian Hitchman to AusGeochem and laboratory staff performing the Geoscience Australia geochemical analyses can upload the finished data directly into the platform, simultaneously linking the analyses to the Geoscience Australias geomagnetic observatory networksample metadata. Collaborators from industry and academia covers one-eighth of the Earth. The first Australian geomagneticcan be provided secure and private access to the data to observatory was established in 1840 in Hobart. This almostperform statistical analyses, use novel capabilities to visualise continuous 180-year period of magnetic-field monitoringand synthesise data within the context of large volumes of provides an invaluable dataset for scientific research. aggregated publicly funded geochemical data, all directly FEBRUARY 2023 PREVIEW 150'