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Marigold Garuda Deep Gold F1
The service water often contains nitrate, probably as a result of the explosives used in the mining process, and sulfate, which originates from oxidation of sulfide minerals. Dolomite aquifer water sample D1 is isotopically lighter than either the service water samples or modern precipitation. This result is not consistent with rapid recharge of the dolomite aquifer by modern surface meteoric water as the sole source and suggests that a portion of the dolomite water originates from an isotopically lighter source. Fissure water samples F1 and F3 were isotopically similar to each other, and their values clustered with borehole water values reported for other South African gold mines by Duane et al. (17).
Deep Gold x Verse: Shed at Toronto
Mine design and scheduling at South Deep is done in Mine 2-4D and Earthworks Project Scheduler (EPS) software, on a Datamine platform. All designs are based on three dimensional resource models.
Gold Fields has produced a Sustainability Report in 2009 and intends reporting annually in accordance with the Global Reporting Initiative. This Technical Statement has been prepared in Compliance with the South Africa Code for the Reporting of Exploration Results, Mineral Resources and Mineral Reserves (2007 SAMREC Code). A paradigm improvement in the stratigraphic and sedimentological resolution within the Upper Elsburg reef units has been developed over the past two years, which will facilitate 3D evaluation and fit for purpose mine design and scheduling.
Marigold Garuda Deep Gold F1
About 60% of Australia's gold resources occur in Western Australia, with the remainder in all other States and the Northern Territory. Virtually all resources occur in primary deposits, many of which have undergone some degree of weathering. Weathered primary deposits are important to the gold industry because they are usually easier and cheaper to mine and the gold is easier to recover. Visit our Education Centre The Education Centre provides curriculum-linked, hands-on activities that keep students captivated, focused and looking for more. Teacher Programs Geoscience Australia hosts earth science related programs and events for teachers.
In biological leaching the oxidation is caused by the action of specific bacteria on the ore. The tonnage of refractory ore to be roasted or leached is greatly reduced by first producing a finely ground concentrate.
Acid mine water is commonly observed in metalliferous ore mines and is formed by both chemical and microbiological processes (38). In the South African gold mines, water dripping from wall and roof cracks was often acidic.
The model is employed in an analysis which shows that plastic deformations tend to localize in thin shear bands, which may occur even before peak strength is reached. Finally, a review is given of concepts for modelling hysteresis and strain accumulation in cyclic loading. The concept of a bounding surface in addition to a yield surface is discussed and is adapted for use in a sophisticated model for loose and cemented granular materials under cyclic loading.
Retail store & pick up point
Uncle Harry�s equates to the Kalbasfontein Prospecting Right. It is estimated that the contiguous ground immediately to the east of South Deep, contains an Inferred Mineral Resource of 14.6 Moz at a cut-off grade of 3 g/t. This ground will be accessed through the existing South Deep infrastructure.
We pay our respect to them and their cultures and to the elders past and present. Free-milling ore is the name for when gold can be recovered by crushing, grinding and cyanidation (treatment with a dilute cyanide solution) without additional processing. In refractory ore the gold is locked in sulphide minerals, so to achieve satisfactory levels of gold recovery additional processing is required before cyanidation. Sulphide minerals in refractory ores are converted to oxides by either roasting or biological leaching to release the gold.
A major capital Long Inclined Borehole (LIB) drilling programme has been initiated at South Deep on 95 and 110 levels. This drilling programme is designed to provide geological structure, facies and grade information in current mining areas, in zones below current infrastructure and south of the Wrench Fault which duplicates 110 level further south. The two year drilling programme involves some 17.4 km of drilling at an estimated cost of R15.3 million. Continued exploration in the late 1970�s confirmed earlier indications that the target reef horizons extend well to the south in the area which has become known as the South Deep Project Area (SDPA). Underground mining is used where the depth of ore below the surface makes open-cut mining uneconomic.
Gold is the only yellow metal and is chemically very stable. It does not readily combine with other substances and, therefore, does not corrode or tarnish. Because of this property, it is almost always found in nature as pure gold. This meant that the early humans could collect the gold and use it without having to smelt or refine the metal from a mineral. Gold is a very rare substance making up only ~3 parts per billion of the Earth's outer layer (imagine 1 billion smarties in one place and only 3 of them were made of gold!).
The mine was further explored and categorised into four areas, namely Old Mine, Current Mine, Phase 1 and Phase 2. Old Mine region is situated above the 90 Level and is accessed through the South Shaft complex.
- At Beatrix Mine, the dolomite and Ventersdorp sequences are absent, and Karoo (200 to 300 megaannum [Ma]) sediments overlie the Witwatersrand Supergroup.
- This novel idea is introduced to account for the degradation of the cohesion of cemented granular materials with increasing inelastic deformation.
- Additional, the tracking number is welded with big letters on the front side of the tube (retouched in the foto above).
- Image courtesy of Gold Fields.Head gear attached to the ventilation shaft at the South Deep gold mine.
All Mineral Resource and Mineral Reserve figures reported are managed unless otherwise stated and Mineral Resources are inclusive of Mineral Reserves. The largest gold nugget ever found was the 'Welcome Stranger', found in 1869 just under the soil at the base of a tree! It weighed 70 kg and on today's value would be worth over $3 million. The second largest gold nugget ever found was the Welcome Nugget (68.98 kg), that was discovered by a group of twenty-two Cornish miners at the Red Hill Mining Company site at Bakery Hill in Ballarat, Victoria, Australia, on June 9, 1858. It was located in the roof of a tunnel 55 metres underground.
The 30 June 2009 Mineral Resources and Mineral Reserves are based on new resource estimation and mine design work completed over the past 12 months, which has resulted in approximately 50% of reserved ounces having been remodelled and designed (previously 12%). The remaining Mineral Resources and Mineral Reserves are as previously reported at 30 June 2008 (i.e. acquisition figures). South Deep Gold Mine is an intermediate to deep level gold mine comprising two shaft systems that mine various auriferous conglomerates from open ground and pillars that occur at depths between 1,575 m and 3,500 m below surface.
When these fluids cooled or reacted with other rocks the dissolved gold precipitated (came out of the fluid) in cracks or fractures forming veins. If the fluids move over a large enough area, and dissolve the gold for a long enough period of time, gold can be concentrated in amounts in the parts per thousand or even greater.
Tramming Ore. Simmer Deep Gold Mine.
Mineral Reserve statements include only Measured and Indicated Mineral Resources, modified to produce Mineral Reserves and contained in the Life of Mine (LoM) plan. Unless otherwise stated, all Mineral Resources and Mineral Reserves are quoted as 100% and are not attributable with respect to ownership. The Measured and Indicated Mineral Resources are inclusive of those Mineral Resources modified to produce Mineral Reserves. South Deep�s environmental initiatives are focused on reducing the impact that the mine may have on the receiving environment through concurrent rehabilitation and responsible water management.
Its rarity and physical properties have made gold one of the most prized of the Earth's natural resources. Strategic Priorities We apply our diverse professional expertise to the opportunities and challenges that face our nation. Corporate Documents A range of documents govern our operations and provide information about our projects and initiatives. Our People and Careers Our strength lies in our people and our diversity in backgrounds. Geoscience Australia offers a variety of scientific, technical, IT and administrative roles.
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Color name: RGB #594E00, 113 Deep gold
Mineral Reserve estimation at South Deep is based on development of an appropriately detailed and engineered LoM plan, which accounts for all necessary access development and stope designs. All design and scheduling work is undertaken within mine planning software.
An extensive exploration programme was initiated in 2007, to facilitate improved planning and optimisation to ensure robust geological and evaluation models. Results of this programme will underpin the resource definition of the VCR and the evaluation of the Upper Elsburg reefs. The programme will provide clarification on the orebody potential below infrastructure as well as an assessment of the regional potential of contiguous Prospecting Rights, which includes the Uncle Harry�s ground. The Upper Elsburg Reefs constitute 93% of the Mineral Reserves and are an ideal mechanised mining target, while the VCR constitutes the remaining 7%.
Gold Fields has embraced Sustainable Development as a business imperative, which is reflected in its Vision, Values and Strategy. Through this, Gold Fields has introduced structures that encourage a networked interface between disciplines like Safety, Health, Environmental Engineering, Natural Environment, Risk, Stakeholder Engagement, Legal and Communication. This approach has allowed Gold Fields to capitalize on synergies and to avoid duplication.
The West Rand/Panvlakte/Waterpan horst block is situated between the Kloof and South Deep Gold Mines and regionally demarcates the western boundary of South Deep. A series of dykes also straddle the mine lease, are orientated roughly north-south, and can attain thicknesses of up to 35 m. The younger, post Black Reef age dykes separate the overlying dolomite into water compartments. The South Deep gold mine is located in the Mpumalanga region of South Africa and one of the world’s biggest gold mines.
At full production South Deep will produce between 750 � 800 koz pa. Mostly, gold is spread throughout the rocks and soil around us but in such low amounts that it's not worthwhile trying to get it out. However, there are some places where there is enough gold to make it economic to mine. Most gold mined in Australia today cannot be seen in the rock, it is very fine grained and mostly has a concentration of less than 5 grams in every tonne of rock mined. The feasibility of mining low concentrations of gold largely depends on the price of gold.
Focus remains on developing the South Deep Mine to achieve steady state sustainable production in the next five years. These milestones are necessary to facilitate the build up to full production by December 2014.