This preliminary report will provide a geochemical and ionic characterisation of groundwater, to determine baseline conditions and, if possible, to distinguish between different aquifers in the Laura basin. The groundwater quality data will be compared against the water quality guidelines for aquatic ecosystem protection, drinking water use, primary industries, use by industry, recreation and aesthetics, and cultural and spiritual values to assess the environmental values of groundwater and the treatment that may be required prior to reuse or discharge.

Geoscience Australia conducted an absolute gravity survey during April and May 2015 in order to maintain and update the Australian Fundamental Gravity Network (AFGN). During the 2015 AFGN field campaign 35 absolute gravity readings were taken with an A10 gravity meter out of which 29 were new additions to the network. Six of the readings were taken over older AFGN stations in order to update and validate existing values. The re-measures found the previous gravity values agreed with the new A10 measurements within their stated uncertainties. Two ties were made with the CG5 gravity meter from a newly established station in order to resolve discrepancies with existing gravity values. 30 pre-existing stations were checked for their condition during this survey and 5 stations were found to be destroyed. GPS readings were taken at existing stations and their locations updated in the database as many of the old stations had poorly defined locations.

Within the Perth region, a karst belt lies five kilometres inland from the coast and stretches for approximately 24 kilometres in a north west to south east direction. This area is made up of one main geological unit, the Tamala Limestone which is surrounded by residual sands formed from the erosion of the limestone.

This publication is the successor to Oil and Gas Resources of Australia 2006 and continues as the definitive reference on exploration, development and production of Australia's petroleum resources. The tables describe: - wells drilled - seismic surveys - petroleum discoveries - petroleum reserves - production and development including a chronological listing of offshore facilities

This Oil and Gas Resources of Australia 2006 publication is the successor to Oil and Gas Resources of Australia 2005 and continues as the definitive reference on exploration, development and production of Australia's petroleum resources. The tables describe: - wells drilled - seismic surveys - petroleum discoveries - petroleum reserves - production and development including a chronological listing of offshore facilities

This Oil and Gas Resources of Australia 2009 publication is the successor to Oil and Gas Resources of Australia 2008 and continues as the definitive reference on exploration, development and production of Australia's petroleum resources. The tables describe: - wells drilled - seismic surveys - petroleum discoveries - petroleum reserves - production and development, including forecasts of crude oil and condensate form 2010 to 2025 and a listing of offshore facilities

This Record contains nine detrital zircon U-Pb geochronological datasets (outlined in Table 1.1) obtained via Sensitive High-Resolution Ion Microprobe (SHRIMP) from nine sedimentary samples obtained from the Geological Survey of Western Australia (GSWA) Harvey 1 well. Analysis was supported by the GSWA and Royalties for Regions Exploration Incentive Scheme (EIS). GSWA Harvey 1 was drilled in the southern onshore Perth Basin, Western Australia, on the ‘Harvey Ridge’ structural feature (Millar and Reeve, 2014). The aim of the study was to provide insights into the potential provenance of sedimentary rocks of the southern Perth Basin. This record provides detailed results for each sample individually, including a description of the target mineral for geochronology, the relevant analytical data and a brief geochronological interpretation. The Leederville Formation sample has a 238U/206Pb maximum depositional age of 134 ± 3 Ma (2σ), which is consistent with the Early Cretaceous (Hauterivian–Aptian), biostratigraphically determined depositional age. Three Eneabba Formation samples yield individual 238U/206Pb maximum depositional ages, from shallowest to deepest, of 514 ± 15 Ma (2σ), 515 ± 11 Ma (2σ), and 505 ± 23 Ma (2σ), respectively. These ages are considerably older than the biostratigraphically determined Early Jurassic depositional age. Four Lesueur Sandstone samples yield individual 238U/206Pb maximum depositional ages, from shallowest to deepest, of 517 ± 14 Ma (2σ), 527 ± 9 Ma (2σ), 513 ± 24 Ma (95% confidence), and 513 ± 14 Ma (2σ), respectively. These ages are considerably older than the biostratigraphically determined Late Triassic depositional age. The single Sabina Sandstone sample has a 238U/206Pb maximum depositional age of 537 ± 9 Ma (2σ), which is considerably older than the biostratigraphically determined Early Triassic depositional age.

No abstract available

Prepared as a contribution to the joint Commonwealth and State Murray Basin Hydrogeological Project.

The report and map synthesise groundwater studies made since 1954. Analysis of hydrogeological data defines the distribution of bore yield and groundwater chemistry for the regional aquifers of the ACT and environs. The aquifers are composed of fractured sedimentary, volcanic, and igneous rocks, and limited unconsolidated sediments in several different physiographic settings. Analysis of data, based on a three-way geological, 'broad-physiographic', and 'local-landform' subdivision scheme, shows that for bore yield, only the 'local-landform' parameter shows consistent relationships: in a given geomorphic unit, hill-crest bores always have lower yields than valley-floor or hill-slope bores. The highest mean yields are obtained from valley-floor bores tapping fractured aquifers in Ordovician to Early Silurian sedimentary rocks on the Cullarin Tableland. Groundwater yield is mostly obtained from the top 40 m of bores, and boreholes deeper than 100 m failed to improve yields. Groundwaters are generally dilute - less than 1200 mglL total dissolved salts. The variation in solute concentration is attributable to the geochemistry of the aquifer, the dissolution of soluble salts in the unsaturated zone of recharge areas, and the residence time of water in the aquifer. The better-quality water is found in aquifers that are geochemically stable, under high hydraulic gradients, close to recharge zones.