This document describes a format of the AVNIR-2 (Advanced Bisible Near-Infrared Radiometer) products generaged by the ALOS Data Processing Subsystem.

The Crazy Ants shapefile included in the CIGIS release was built from Parks Australia North Christmas Island (PANCI) working database file as at December 2001. This data contains observation data made by PANCI employees during their research of Crazy Ants colonies on Christmas Island.

Mapping Mineralogical and structural relationships with satellite-borne ASTER and airborne geophysics at Broken Hill

Project C5 Curnamona Audit and Gaps Analysis Report

Mining lease boudaries were supplied to Geoscience Australia as many small polygons. Geoscience Australia merged all these polygons to form one theme of mine lease boundaries. This data shows areas where mining of phosphate has been approved. The mine lease theme is mineleases.shp and contains the following fields: Field Type Width Decimal ---------------------------------------------------Shape FIELD_SHAPEPOLY 8 0 Id_lease FIELD_CHAR 8 0 Leasnum FIELD_DECIMAL 5 1 Leasrdcd FIELD_DECIMAL 2 0 Area FIELD_DECIMAL 8 1 Perimeter FIELD_DECIMAL 7 2 Hectares FIELD_DECIMAL 16 3

No abstract available

Geoscience Australia distributes a range of Antarctica maps and images at various scales and currency, on behalf of Australian Antarctic Division. These products are very diverse and include topographic maps and satellite images, ranging from landscape specific (1:1,000 scale) to regional (1:20,000,000) scale.

Formed throughout some 40% of the earth's history (>2500 Ma), Archaean cratons now comprise <10% of the continents, but contribute disproportionately to the world's mineral wealth. Remnant Archaean terrains vary in age from fragments as old as 3.6 to 4.0 Ga in age (e.g., Isua - Greenland, Acasta's Slave Province), to more common younger cratons (3.6 to 2.5 Ga) of various sizes, the largest being the Superior Province (1,572,000 km2), which alone constitutes greater than 20% of the total exposed Archaean (Thurston, 1991). Better known Australian examples include the small but well exposed (3.6 Ga and younger) Pilbara Craton (45,000 km2), and the significantly larger, but poorly outcropping Yilgarn Craton (>600,000 km2), both in Western Australia. Granitic rocks form the main component of most Archaean Cratons (e.g., ~70% of the Yilgarn). They occur as syn-volcanic and younger intrusive units within volcano-sedimentary assemblages (greenstone belts), as intrusive components of batholiths, and as components of high-grade gneiss terrains. Their compositional range is extensive and reflects both short-lived or local tectonic processes as well as longer-term process that relate to regional or global evolution.

We propose a geodynamic model for the generation of Fe oxide Cu-Au deposits in the eastern Gawler Craton. Rifting during the early Calymnian Period, at 1.59 Ga, produced steep geothermal gradients, active magmatism, regional-scale faulting, and immature clastic sedimentation. Major NNW?SSE-trending, dextral transtensional faults exerted fundamental structural controls on several elements of the mineral system: the geometry of intrusion of magmas of the Hiltaba Suite; the provision of fluid pathways for magnetite- and haematite-buffered fluids; creation of basinal space for the effusive lavas of the Gawler Range Volcanics and the overlying terrigeneous sediments of the Pandurra Group; and propagation of near-surface fault tips giving rise to fault-bound hydrothermal breccias. We demonstrate that faults active at 1.59 Ga were of sufficient dimension and seismic longevity to have acted as fluid pumps within the mineral system. Their size and location imply multiple sources for metals in the Olympic Dam deposit and other Fe oxide Cu-Au occurrences in the region. Multiple sources would have resulted in some of the anomalous features of the mineralisation, such as non-magmatic Br:Cl ratios, and magmatic and juvenile, mafic isotopic signatures, all noted by previous workers. Isostatic footwall uplift in the actively extending system may have compressed the regional geothermal gradients, and brought rock volumes altered by hot, reduced fluids into contact with circulating cooler, oxidised fluids. In general, fluid circulation and deposition was enhanced by deformation-induced permeabilities and hydrofracture. In the time-span of the mineral system, say 3 million years, mineralisation cycles (source-transport-deposition) may have repeated 102 to 106 times, depending on the hydraulic conductivity of the source rocks. Some associations at the Olympic Dam deposit, such as granite and maar-like volcanism, are fortuitous and are not essential elements of the mineral system. In the light of the geodynamic model, geophysical. geochemical, and petrological data may be examined for evidence of likely source rocks, fluid pathways, and suitably oxidised magnetite deposits that may contain ore.

North Queensland comprises Palaeoproterozoic to Mesoproterozoic basement (Etheridge, Savannah, Croydon ) provinces structurally overlain by successively younger components including Neoproterozoic-Cambrian (Iron Range, Cape River, Barnard), Cambrian-Ordovician (Thalanga) and Ordovician to Carboniferous (Broken River, Hodgkinson) provinces. The region has been the site of long lived, episodic, widespread and voluminous felsic I-, S- and rarer A-type magmatism, spanning some 1200 Ma. Major episodes of granite formation include the Mesoproterozoic (ca 1550 Ma), the Cambrian to Ordovician (ca 480-460 Ma) Macrossan Igneous Province, the Silurian to Devonian (ca 430-380 Ma) Pama Igneous Province, and the Carboniferous to Permian (ca 330-260 Ma) Kennedy Igneous Province.