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  • A seismic reflection survey was carried out in the Parish of Darriman, Victoria. The survey was planned to investigate a gravity anomaly, which may be an indication of a structure within the sedimentary section favourable to the accumulation of oil or natural gas. For the most part reflections were exceptionally good, and it was possible to trace one reflecting layer over most of the area. Contouring showed the presence of an anticlinal structure, plunging to the east, but rising and broadening to the west. On the flat crest of the structure, there is probable closure in two places. The thickness of the Tertiary sediments may be a maximum of 6,000 feet, but may be only 3,000 feet on the crest of the structure and 4,000 feet on the flanks.

  • This statement sets out the results of drilling by the Bureau within Swansea Sub-area N.S.W. (J.B.C. plan BG-4). The area investigated comprises approximately 115 acres, about 2 miles south of the township of Swansea in the parish of Wallarah, Country Northumberland. In the Swansea area 'test and define' core drilling by the Bureau has indicated coal reserves of approximately 302,000 tons within the physical limits required for open cut exploitation. This total is made up of more than 87,000 tons in the "Open Cut Block" and 215,000 tons in the "West Block". Proving is recommended for the open cut Block and for the West Block, except that in the latter area the obstruction which will be offered to open cutting by the presence of the P.M.G. cable should be considered before proving is undertaken.

  • Map which identifies Australia's diamond deposits, kimberlites, and related rock locations overlaying the 'Magnetic Anomaly Map' image. Includes photo images of major mine fields, and pie charts depicting Australia's diamond production and value in $US against world data. Information compiled from different sources, including mining companies, mining journals and 'Magnetic Anomaly Map'

  • Geoscience Australia provides information on the nation's future capacity to produce mineral resources. Australia's Identified Mineral Resources is an annual nation-wide assessment of Australia's ore reserves and mineral resources. All major and a number of minor mineral commodities mined in Australia are assessed. Australia's economic demonstrated resources (EDR) of the following mineral commodities increased during 2004 - bauxite, black coal, copper, gold, iron ore, ilmenite, lead, manganese, rare earth elements, tantalum, tin, uranium and zinc. EDR of cobalt, diamonds (both gem and industrial), lithium, phosphate, rutile, silver, tungsten and zircon decreased during the year. EDR for brown coal, magnesite, molybdenum, nickel, niobium, platinum group metals, shale oil, and vanadium remained at levels similar to those reported in 2003. Increases in EDR were due to on-going drilling and evaluation of known deposits resulting in the transfer (re-assessment) of resources from inferred or sub-economic categories into EDR, and discoveries of new deposits or extensions of known deposits. Newly delineated resources of 1 256 t added to gold's total national inventory, with growth in all east coast mainland states and South Australia. A few mining companies re-estimated ore reserves and mineral resources more conservatively for some commodities to comply with the requirements of the Australasian Code for Reporting of Mineral Resources and Ore Reserves (JORC Code).

  • Presentation to minerals industry representatives at the Geological Survey of Western Australia, 4 May 2010.

  • Australia's Identified Mineral Resources is an annual nation-wide assessment of Australia's ore reserves and mineral resources.

  • The mineral industry is an integral part of the Australian economy, generating $29,785 million in export revenue in the 1993-94 financial year. This was over 60% of all commodity exports for the year. Such an important contribution was possible because of the large and diverse resources that sustain the industry. Economic demonstrated resources (EDR) of several commodities, including gold, ilmenite, manganese, magnesite, zinc, tin and silver, rose substantially in 1994. EDR for cadmium, diamond and vanadium fell significantly, and for other commodities remained steady or showed minor variation over the year. Exploration expenditure continued to be dominated by the search for gold. Figures published by the Australian Bureau of Statistics (ABS) show that in 1993-94, $793 million was spent on mineral exploration of which 57% was on gold. Expenditure on diamond exploration rose by 54% to $58 million. Successful exploration programs have maintained Australia's position as one of the world's premier resource nations despite continued high rates of production. Australia is one of the world's top six countries for resources of commodities as diverse as bauxite, bismuth, gold, mineral sands, lithium, iron ore, lead, silver, manganese, zinc, tantalum and uranium.

  • In 2002, Australia's economic demonstrated resources (EDR) of bauxite, diamond, gold, iron and manganese ore, lithium, tin, tungsten and uranium increased, while those of black coal, ilmenite, tantalum, cadmium, zinc and vanadium decreased. EDR of brown coal, cobalt, lead, magnesite, rutile, zircon, nickel, niobium, phosphate, shale oil and silver remained at levels similar to those reported in 2002. The reductions in EDR were due mainly to production, with low commodity prices a subsidiary factor. Australia's EDR of base metals (zinc, lead, silver) nickel, mineral sands and uranium remain the world's largest, while bauxite, black coal, brown coal, cobalt, copper, gold, iron ore, lithium, manganese ore, rare earth oxides and gem/near gem diamond rank in the top six worldwide. Strong growth in gold prices in 2002 contributed to an increase in its EDR. The duration of gold's EDR (20 years at current production rates), however, signals the need for ongoing successful exploration in the short and medium term for this commodity, which is currently Australia's third largest export commodity. Similarly, there is a need for significant new discoveries of base metals to produce these commodities at current output levels beyond the next 20 to 25 years. Australian mineral exploration expenditure fell by 6% to $640.5 million in 2001-02, the lowest financial year current dollar amount since 1992-93. Spending for the calendar year, however, rose by $13.8 million (2%) to $678.2 million. A world survey of exploration budgets for 2002 by the Metals Economics Group saw Australia displaced by Canada as the world's leading exploration destination. In response to the low levels of exploration expenditure, industry and governments initiated studies to examine the economic implications of the downturn and ways at building industry recovery, including policy measures that may facilitate future mineral exploration activity in Australia.

  • Igneous rocks have long been recognised as an important source of metals in uranium mineral systems. Although magmas may form mineral deposits in their own right, they may also contribute directly to basin-related mineral systems as a source of metals and/or ligands. Thus, mapping of the distribution of uranium in igneous rocks has the potential to highlight potentially prospective regions for uranium mineralisation at a macro-scale. This map is the first in a series of three showing the uranium content of Australian igneous rocks. Map 1 shows the individual geochemical data points compiled for this study. Points are coloured and sized based on their uranium content. Igneous rock types from Geoscience Australia's 1:1,000,000 national surface geology dataset are also shown in the background. Geochemical analyses from igneous rock types spanning all compositions have been utilised, despite the low total abundance of uranium in ultramafic, mafic and intermediate compositions. Together with the two other maps in the series, this map demonstrates the close spatial relationship between uranium-rich igneous rocks and areas of known uranium mineralisation. In addition, new regions previously unknown for uranium mineralisation can be identified.

  • Igneous rocks have long been recognised as an important source of metals in uranium mineral systems. Although magmas may form mineral deposits in their own right, they may also contribute directly to basin-related mineral systems as a source of metals and/or ligands. Thus, mapping of the distribution of uranium in igneous rocks has the potential to highlight potentially prospective regions for uranium mineralisation at a macro-scale. Map 3 in the series of three maps of the uranium content of Australian igneous rocks shows the interpreted solid geology distribution of igneous rocks. Since no nationally seamless solid geology map yet exists, datasets have been compiled from a variety of State and Territory open file sources. Polygons are coloured by their average uranium content. The average uranium content of each polygon was calculated by plotting the igneous polygons together with geochemical sample points (distribution shown in Map 1 of the series) using ArcGIS software. Each polygon was then attributed with the average uranium value (in ppm) of all intersecting geochemical sample points. This approach allows igneous uranium content to be assessed on the pluton- to province-scale, depending on polygon resolution. Furthermore, the use of solid geology datasets allows for the uranium content of igneous rocks in the subsurface to be assessed, opening up broader areas for new potential uranium mineral systems. Together with the two other maps in the series, this map demonstrates the close spatial relationship between uranium-rich igneous rocks and areas of known uranium mineralisation. In addition, new regions previously unknown for uranium mineralisation can be identified.