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  • This map shows the boundary of the Maritime Security Zones for each port for the purpose of the Maritime Transport & Office Security Act 2003. 6 sheets (Colour) September 2009 Not for sale or public distribution Contact Manager LOSAMBA project, PMD

  • Overview of the Deep Crustal Seismic surveys conducted by Geoscience Australia and funded through the Onshore Energy Security Program since it's commencement in 2006 to September 2009.

  • Hot Rock geothermal exploration in Australia is significantly different to methods used for conventional geothermal plays elsewhere in the world. Hot Rock geothermal plays in the most essential form comprise a heat source and insulating layer. In Australia, high-heat producing granites (HHPG) are the presumed heat source, while low-conductivity sedimentary rocks provide the insulator necessary to create an accumulation of heat and elevated temperatures. It is presumed that other elements of a geothermal play can be introduced, such as using hydrofracturing or chemical treatment to achieve the required permeability, or the injection of circulation water.

  • Summary of GA's plans for marine seismic and reconnaissance surveys off southwestern Australia in 2008/09 as part of the Offshore Energy Security Program

  • Map showing Australia's Maritime Jurisdiction in the Torres Strait on a blue imagery background made from data collected from research vessels and/or derived from satellite imagery. Additional information includes the Special Quarantine Zone for the Australia Quarantine Inspection Service.

  • This map shows the boundaries of the Maritime Security Zones for each port for the purpose of the Maritime Transport & Office Security Act 2003. 7 Sheets (Colour) December 2009 Not for sale or public distribution Contact Manager LOSAMBA project

  • An igneous zircon reference material (OG1) was characterised for U-Pb isotopes by ID-TIMS, and utilised to evaluate SIMS (SHRIMP) instrumental mass fractionation (IMF) of radiogenic Pb isotopes (207Pb*/206Pb*). The TIMS 207Pb*/206Pb* reference value for OG1 was 0.29907 ± 0.00011 (95% confidence limit), 3465.4 ± 0.6 Ma. The high 207Pb* (~ 30 -g g-1), negligible common Pb, and isotopic homogeneity permitted precise (± 1-2) 207Pb*/206Pb* measurements within the analytical sessions. External reproducibility of mean 207Pb*/206Pb* ratios between sessions was demonstrated for one instrument, yielding a mean IMF of +0.87 ± 0.49. The mean 207Pb*/206Pb* ratios between instruments were dispersed beyond uncertainties, with session IMF values from +3.6 ± 1.7- to -2.4 ± 1.3, and a grand mean IMF value (twenty-six sessions) of +0.70 ± 0.52, indicating a tendency towards elevated 207Pb*/206Pb*. The specific causes of variability in IMF are unclear, but generally reflect subtle differences in analytical conditions. The common practice in SIMS of assuming that IMF for Pb+ is insignificant could result in systematic age biases and underestimated uncertainties, of critical importance for precise correlation of Precambrian events. Nevertheless, a zircon RM such as OG1 can be readily incorporated into routine dating to improve 207Pb*/206Pb* accuracy and external reproducibility.

  • Hyperspectral images from the Eastern Fold Belt of the Mount Isa Inlier, released by the collaborative Queensland NGMM project between GSQ and CSIRO, were validated as new tool for the detection of IOCG related alteration. High resolution of mineral maps derived from hyperspectral imaging (4.5m/pixel) enables the recognition of various types of hydrothermal alteration patterns and the localisation of fluid pathways. Groundtruthing of a suite of mineral maps was conducted in 2007. Though sample analyses in the lab is still in process, but some preliminary results already show some promising features. In summary hyperspectral images provide a powerful tool for the recognition of various hydrothermal alteration patterns and could be used in combination with other geophysical remote sensing data, such as radiometrics and magnetics. Limitations of this technique are defined by unsatisfactory coverage of mineral maps, man made features, river systems and distribution and composition of debris. A good knowledge of the local geology is necessary to extract the full information provided by the mineral maps. Calibration of ASTER data with the hyperspectral data can hopefully extend interpretation made from the HyMap data into adjacent areas, which are only covered by ASTER. 60pp final report and databases.

  • New and existing Sm-Nd whole rock isotope data and U-Pb zircon ages from sedimentary rocks in several Australian Proterozoic Provinces hosting Zn-Pb mineralisation show a distinct transition that corresponds to a change from evolved sediment sources to more juvenile sedimentary sources at ~1650 Ma. This Sm-Nd isotopic change has been documented in the Eastern and Western Successions of the Mount Isa Inlier, the Etheridge Province of the Georgetown Inlier. A similar transition at ~1650 Ma has also been documented in the Broken Hill and Olary Domains of the Curnamona Province (Barovich and Hand 2008) and defines a continental-scale isotopic signal. The world-class, sediment-hosted Mt Isa and Hilton-George Fisher Zn-Pb Mt Isa-style deposits in the Western Mount Isa Inlier occur above the transition in sediments derived from more juvenile sources. In contrast, Pb-Zn-Ag Broken Hill-style deposits, including the Broken Hill (Curnamona), Cannington (Isa), Mount Misery (now Chloe) and Railway Flat deposits (Georgetown Inlier) (Carr et al. 2004) occur below this ~1650 Ma transition in sediments which have a much more evolved source.

  • This map shows the boundaries of the security regulated port for the purposes of the Maratime Transport & Offshore Facilities Security Act 2003 4 sheets (colour) October 2009 Nort for sale or public distribution. Contact Manager LOSAMBA project, PMD.