Presented at the Evolution and metallogenesis of the North Australian Craton Conference, 20-22 June 2006, Alice Springs. New and previously published ⁴⁰Ar/³⁹Ar data from the Tennant, Tanami, Davenport, and northern Arunta regions complement U-Pb geochronological data, providing additional time-constraints for various styles of mineralisation, and reveal the spatial extent of low- to medium-grade thermal overprints within the craton. <p>Related product:<a href="https://www.ga.gov.au/products/servlet/controller?event=GEOCAT_DETAILS&amp;catno=64764">Evolution and metallogenesis of the North Australian Craton Conference Abstracts</p>

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An updated map originally produced for the Department of Transport and Regional Srevices in October 2003 to show the Coral Sea Islands Territory and Australia's maritime boundaries.

This map has been created to support the Taruman illegal fishing court case, and is part of a map series. It shows recorded positions from Exhibit 11/09/05-4.3 of suspected long lines within Australia's AFZ around Macquarie Island for the 25-26/05/2005. This map is not for public distribution.

This data is part of the series of maps that covers the whole of Australia at a scale of 1:250 000 (1cm on a map represents 2.5km on the ground) and comprises 513 maps. This is the largest scale at which published topographic maps cover the entire continent. Data is downloadable in various distribution formats.

This map was produced as part of a 2006 series depicting Australian commonwealth fisheries and shows the area of the Southern Bluefin Tuna Fishery. The series of pdf's are for public download from AFMA's website and the shapefiles for public download from GA's website.

This data is part of the series of maps that covers the whole of Australia at a scale of 1:250 000 (1cm on a map represents 2.5km on the ground) and comprises 513 maps. This is the largest scale at which published topographic maps cover the entire continent. Data is downloadable in various distribution formats.

Protoliths of the Strangways Metamorphic Complex (SMC) in the Arunta Region of central Australia are dated to the 1810-1800 Ma Stafford magmatic event by SHRIMP U-Pb dating of igneous cores within granulite grade metamorphic zircons. Detrital zircons preserved in an associated metasediment have a provenance age spectrum similar to that in the Lander Package sedimentary rocks which are widespread in the region. The onset and duration of granulite facies metamorphism is recorded differentially across the SMC depending on lithology, varying mechanisms of metamorphic zircon crystallisation, and specific P-T-t paths experienced by different sectors of the complex. The earliest recorded thermal process is anatectic partial melting in the Kanandra Granulite at 1734 ± 3 Ma; zircon crystallisation from melt is indicated later at Edwards Creek (1716 ± 3 Ma) and Coles Hill (1708 ± 6 Ma). Later overgrowths indicate renewed metamorphic zircon precipitation in the Kanandra Granulite, probably from fluids, as late as ca. 1690 Ma. A 50 Myr continuum of metamorphic zircon ages, from ca. 1740-1690 Ma, is recorded in a single rock at Utnalanama and attributed to prolonged solid-state metamorphic zircon formation. The Strangways Event was not a transient and discrete process with a single age. There is evidence for prolonged residence at granulite facies conditions, with both discrete crystallisation events, and prolonged crystallisation responses, in different locations. Termination of the high grade metamorphism coincided with the local intrusion of a dolerite dyke swarm at 1689 ± 8 Ma. The Strangways Event coincides with the segment between prominent bends B0 and B1 of the Australian Palaeomagnetic Polar Wander Path, relating the thermal process to major direction changes in the movement of the north Australian plate. The geographic distribution of high grade metamorphism within the SMC, shallow-crust emplacement of magmas in the Tennant Region, and a low-temperature Ar isotope record in the Tanami Region, is consistent with effects propogating northwards from a plate boundary south of the SMC. Lamprophyre intrusions implicate subduction-modified mantle and the prolonged Strangways Event is probably a record of collisions or direction changes during north-directed subduction under the area.

This map was produced as part of a 2006 series depicting Australian commonwealth fisheries and shows the area of the Torres Strait Fisheries. The series of pdf's are available for public download from AFMA's website and the shapefiles for public download from GA's website.

This data is part of the series of maps that covers the whole of Australia at a scale of 1:250 000 (1cm on a map represents 2.5km on the ground) and comprises 513 maps. This is the largest scale at which published topographic maps cover the entire continent. Data is downloadable in various distribution formats.