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The Forbes Geology GIS comprises a digital compilation of regional geological mapping of the Forbes 1:250,000 sheet by AGSO and the NSW DMR under the National Geoscience Mapping Accord from 1995 to 1999. The data package includes all mapping data from the 6 component 1:100,000 geological sheets; Parkes, Grenfell, Bogan Gate, Marsden, Condobolin and Wyalong. The GIS includes polygon and line layers depicting outcropping and buried rock types, structures, and regolith landforms. It also includes point layers depicting outcrop descriptions; mineral occurrences; geochemical, thin section and geochronological samples; georeferenced photographs; structural readings; and drill hole locations. Images of AGSO's airborne magnetic and radiometric data, and a depth to slightly weathered bedrock model are included.
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This module is part of the AGSO-APIRA Australian Petroleum Systems Project. Eight basin modules were examined which covered almost the entire North West Shelf, the Petrel Sub-basin, as well as the Papuan basin in PNG. Two relational databases were established containing the biostratigraphic data (STRATDAT) and reservoir, facies and hydrocarbon shows data (RESFACS). These databases were linked by application programs which allow time series searching using geologically intelligent routines. Petroleum systems analyses were conducted on each area, with key results focussing upon the comparison of source quality and timing of generation between similar systems in different areas.
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WinBury is a one-dimensional heatflow modelling package which takes well stratigraphic data and maturity as input, and outputs computed palaeotemperature and downhole maturity (using the industry standard algorithm of Burnham & Sweeney, 1992). By forward modelling the palaeowaterdepth (directly linked to palaeo-sea bottom temperature) and palaeoheatflow variables, a best fit may be derived to observed maturity data, implying a valid palaeotemperature model at all levels in the well. This palaeotemperature model is then applied to the kerogen types present in the source rocks (using industry standard algorithms of Tissot and Welte, 1978) to predict when source rocks would generate and expel hydrocarbons.
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Fresh groundwater stored in coastal aquifers constitutes an important resource for humans and the natural environment. However, many Australian coastal aquifers are vulnerable to seawater intrusion (SWI), which is the landward encroachment of seawater into coastal aquifers. SWI can significantly degrade water quality and reduce freshwater availability. In response to the threat posed by SWI, Geoscience Australia and the National Centre for Groundwater Research and Training, in collaboration with state and territory water agencies, have undertaken a national-scale assessment of the vulnerability of coastal aquifers to SWI. This report describes one of the project's technical components, the Mathematical Analysis. This project developed a method for first-order assessment of SWI extent under current conditions and propensity to change in SWI extent due to various stressess associated with climate change and future extraction. The method is an extension to an existing analytical sharp-interface solution and involves the use of partial derivative to quantify rates of change in SWI extent for the various stresses.
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Contained in: Proceedings of papers presented at an industry workshop held in Perth, 20 June 2002. Edited by K.F. Cassidy (See link)
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Legacy product - no abstract available
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Legacy product - no abstract available