This map is part of a series which comprises 50 maps which covers the whole of Australia at a scale of 1:1 000 000 (1cm on a map represents 10km on the ground). Each standard map covers an area of 6 degrees longitude by 4 degrees latitude or about 590 kilometres east to west and about 440 kilometres from north to south. These maps depict natural and constructed features including transport infrastructure (roads, railway airports), hydrography, contours, hypsometric and bathymetric layers, localities and some administrative boundaries, making this a useful general reference map.

No abstract available

2-page A4 flyer advertising a GA workshop in Perth (10 June 2016) on Australia's potential for intrusion-hosted Ni-Cu-PGE mineral deposits.

Description of construction and use of static geological models for use in the evaluation of CO2 storage potential using the Petrel Sub-basin as an example

2013 Acreage Release Areas W13-19 and W13-20 in the offshore northern Perth Basin, Western Australia, cover more than 19,000 km2 in parts of the Houtman, Abrolhos, Zeewyck and Gascoyne sub-basins. The Release Areas are located adjacent to WA-481-P, the only offshore exploration permit active in the Perth Basin, granted to joint venture partners Murphy Australia Oil Pty Ltd, Kufpec Australia Pty Ltd and Samsung Oil and Gas Australia Pty Ltd in September 2012. Geoscience Australia recently undertook a regional prospectivity study in the area as part of the Australian Government's Offshore Energy Security Program. A revised sequence stratigraphic framework, based on new biostratigraphic sampling and interpretation, and an updated tectonostratigraphic model, using multiple 1D burial history models for Permian to Cenozoic sequences, provide fresh insights into basin evolution and prospectivity. Geochemical studies of key offshore wells demonstrated that the late Permian-Lower Triassic Kockatea Shale Hovea Member oil-prone source interval is regionally extensive offshore in the Houtman and Abrolhos sub-basins. This is supported by fluid inclusion data that provides evidence for palaeo-oil columns within Permian reservoirs in wells from the Abrolhos Sub-basin. Additionally, oil shows in Houtman-1 can be linked to Jurassic source rocks suggesting that multiple petroleum systems could be effective in the Release Areas. A trap integrity analysis was undertaken to mitigate exploration risks associated with trap breach during Early Cretaceous breakup and provides a predictive approach to prospect assessment. Potential seepage sites on the seafloor over recently reactivated faults correlate with hydroacoustic flares, pockmarks and dark colored viscous fluid observed over the areas. These observations may indicate an active modern-day petroleum system in the Houtman Sub-basin. The presence of a Jurassic petroleum system combined with the extension of the Hovea Member source rock offshore, the potential presence of seeps and results from trap integrity studies provide a platform to revitalize exploration in the offshore northern Perth Basin.

The Australian National GNSS Infrastructure consists of the Continuously Operating Reference Stations (CORS) of the Australian Regional GNSS network (ARGN), operated by Geoscience Australia (GA), and the AuScope network operated collaboratively by GA and the State and Territory geodetic agencies. Developed to support the geospatial sector and Earth science applications, this national infrastructure underpins the national datum, the Geocentric Datum of Australia (GDA), and contributes to the Global Geodetic Observing System (GGOS) products and services, which includes the International Terrestrial Reference Frame (ITRF). To ensure this infrastructure meets needs of its users a quality management system has been developed that includes procedures for site selection, monumentation design, routine data management, and data fitness-for-purpose assessment. This presentation overviews Geoscience Australia's approach to quality management including our approach to monitoring the impact of: equipment configuration change; antenna malfunction; crustal deformation; and processing strategy and modelling changes. Some examples are given based on experience within the Asia Pacific Reference Frame (APREF) community.

In many areas of the world, vegetation dynamics in semi-arid floodplain environments have been seriously impacted by increased river regulation and groundwater use. With increases in regulation along many rivers in the Murray-Darling Basin, flood volume, seasonality and frequency have changed which has in turn affected the condition and distribution of vegetation. Floodplain vegetation can be degraded from both too much and too little water due to regulation. Over-regulation and increased use of groundwater in these landscapes can exacerbate the effects related to natural climate variability. Prolonged flooding of woody plants has been found to induce a number of physiological disturbances such as early stomatal closure and inhibition of photosynthesis. However, drought conditions can also result in leaf biomass reduction and sapwood area decline. Depending on the species, different inundation and drought tolerances are observed. Identification of groundwater-dependent terrestrial vegetation, and assessment of the relative importance of different water sources to vegetation dynamics, typically requires detailed ecophysiological studies over a number of seasons or years as shown in Chowilla, New South Wales [] and Swan Coastal Plain, Western Australia []. However, even when groundwater dependence can be quantified, results are often difficult to upscale beyond the plot scale. Quicker, more regional approaches to mapping groundwater-dependent vegetation have consequently evolved with technological advancements in remote sensing techniques. Such an approach was used in this study. LiDAR canopy digital elevation model (CDEM) and foliage projected cover (FPC) data were combined with Landsat imagery in order to characterise the spatial and temporal behaviour of woody vegetation in the Lower Darling Floodplain, New South Wales. The multi-temporal dynamics of the woody vegetation were then compared to the estimated availability of different water sources in order to better understand water requirements.

Geological mapping with GeoModeller

Hydrogeology of East Timor Poster (IGC 2012)

22-1/G54-14/19 Contour interval: 2