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Nabarlek Uranium Mine
The Nabarlek Mine is a uranium mine in the Northern Territory of Australia which was productively worked only in 1979. The deposit sits within the Alligator Rivers Uranium Field approximately northeast of Jabiru. It was discovered by Queensland Mines Limited in 1970 by following up an intense airborne radiometric anomaly. History Discovery and financial implications Prospecting rights over the future mine were first obtained by Gwendolyne Stevens, a South Australian sheep farmer who had developed an interest in geology. She obtained rights over of the Oenpelli Aboriginal reserve and named the area "nabarlek" after a local marsupial species. She negotiated an exploration program with Queensland Mines Limited, a subsidiary of Kathleen Investments Limited which owned the Mary Kathleen uranium mine in Queensland. Both companies were publicly listed, although Kathleen Investments was majority-owned by the Rio Tinto Zinc Corporation (RTZ). In early 1970, Queensland Mines began ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnhem Land
Arnhem Land is a historical region of the Northern Territory of Australia, with the term still in use. It is located in the north-eastern corner of the territory and is around from the territory capital, Darwin. In 1623, Dutch East India Company captain Willem Joosten van Colster (or Coolsteerdt) sailed into the Gulf of Carpentaria and Cape Arnhem is named after his ship, the ''Arnhem'', which itself was named after the city of Arnhem in the Netherlands. The area covers about and has an estimated population of 16,000, of whom 12,000 are Aboriginal and Torres Strait Islander people. Two regions are often distinguished as East Arnhem (Land) and West Arnhem (Land), and North-east Arnhem Land is known to the local Yolŋu people as Miwatj. The region's service hub is Nhulunbuy, east of Darwin, set up in the early 1970s as a mining town for bauxite. Other major population centres are Yirrkala (just outside Nhulunbuy), Gunbalanya (formerly Oenpelli), Ramingining, and Maningri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Costean
Costeaning is the process by which miners seek to discover metallic lodes. It consists in sinking small pits through the superficial deposits to the solid rock, and then driving from one pit to another across the direction of the vein, in such manner as to cross all the veins between the two pits. Surface mining {{Mining-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uranium Ore Deposits
Uranium ore deposits are economically recoverable concentrations of uranium within the Earth's crust. Uranium is one of the more common elements in the Earth's crust, being 40 times more common than silver and 500 times more common than gold. It can be found almost everywhere in rock, soil, rivers, and oceans. The challenge for commercial uranium extraction is to find those areas where the concentrations are adequate to form an economically viable deposit. The primary use for uranium obtained from mining is in fuel for nuclear reactors. Globally, the distribution of uranium ore deposits is widespread on all continents, with the largest deposits found in Australia, Kazakhstan, and Canada. To date, high-grade deposits are only found in the Athabasca Basin region of Canada. Uranium deposits are generally classified based on host rocks, structural setting, and mineralogy of the deposit. The most widely used classification scheme was developed by the International Atomic Energy Age ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uranium Mining In Australia
Radioactive ores were first extracted in South Australia at Radium Hill in 1906 and Mount Painter in 1911. 2,000 tons of ore were treated to recover radium for medical use. Several hundred kilograms of uranium were also produced for use in ceramic glazes. In 2019 Australia exported of uranium, 12% of world production, for use in nuclear power generation. IAEA and the OECD's NEA reported that the price of uranium in 2019 was $130/kg, and estimated that 35% of the world's uranium resource reserves was in Australia (1,748,100 tonnes out of 4,971,400 tonnes). In terms of production, Kazakhstan is the largest supplier, followed by Canada and Australia. Following the Japanese Fukushima nuclear disaster in early 2011, many countries scaled back their nuclear power production, with some setting deadlines for a complete shutdown of all nuclear power reactors, with a resultant impact on demand for uranium. As of 2013 uranium prices have been very low. New mine developments have recei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triuranium Octoxide
Triuranium octoxide (U3O8) is a compound of uranium. It is present as an olive green to black, odorless solid. It is one of the more popular forms of yellowcake and is shipped between mills and refineries in this form. U3O8 has potential long-term stability in a geologic environment. In the presence of oxygen (O2), uranium dioxide (UO2) is oxidized to U3O8, whereas uranium trioxide (UO3) loses oxygen at temperatures above 500 °C and is reduced to U3O8. The compound can be produced by any one of three primary chemical conversion processes, involving either uranium tetrafluoride (UF4) or uranyl fluoride (UO2F2) as intermediates. It is generally considered to be the more attractive form for disposal purposes because, under normal environmental conditions, U3O8 is one of the most kinetically and thermodynamically stable forms of uranium. Its particle density is 8.3 g cm−3. Triuranium octoxide is converted to uranium hexafluoride for the purpose of uranium enrichment. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Open Cut Mining
Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, is a surface mining technique of extracting rock or minerals from the earth from an open-air pit, sometimes known as a borrow. This form of mining differs from extractive methods that require tunnelling into the earth, such as long wall mining. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface. It is applied to ore or rocks found at the surface because the overburden is relatively thin or the material of interest is structurally unsuitable for tunnelling (as would be the case for cinder, sand, and gravel). In contrast, minerals that have been found underground but are difficult to retrieve due to hard rock, can be reached using a form of underground mining. To create an open-pit mine, the miners must determine the information of the ore that is underground. This is done through drilling of probe holes in the ground, then plotting e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traditional Owners
Native title is the designation given to the common law doctrine of Aboriginal title in Australia, which is the recognition by Australian law that Indigenous Australians (both Aboriginal Australian and Torres Strait Islander people) have rights and interests to their land that derive from their traditional laws and customs. The concept recognises that in certain cases there was and is a continued beneficial legal interest in land held by Indigenous peoples which survived the acquisition of radical title to the land by the Crown at the time of sovereignty. Native title can co-exist with non-Aboriginal proprietary rights and in some cases different Aboriginal groups can exercise their native title over the same land. The foundational case for native title in Australia was ''Mabo v Queensland (No 2)'' (1992). One year after the recognition of the legal concept of native title in ''Mabo'', the Keating Government formalised the recognition by legislation with the enactment by the A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oecophylla Smaragdina
''Oecophylla smaragdina'' (common names include Asian weaver ant, weaver ant, green ant, green tree ant, semut rangrang, semut kerangga, and orange gaster) is a species of arboreal ant found in tropical Asia and Australia. These ants form colonies with multiple nests in trees, each nest being made of leaves stitched together using the silk produced by the ant larvae: hence the name 'oecophylla' reek for 'leaf-house' Description Workers and major workers are mostly coloured orange. Workers are long; they look after larvae and farm scale bugs for honeydew. Major workers are long, with long strong legs and large mandibles. They forage, assemble and expand the nest. Queens are typically long, and normally greenish-brown, giving the species its name ''smaragdina'' (Latin: emerald). Distribution and habitat ''Oecophylla smaragdina'' has a widespread distribution in tropical Asia and Australia, its range extending from India through Indonesia and the Philippines to Northern Terri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dreamtime
The Dreaming, also referred to as Dreamtime, is a term devised by early anthropologists to refer to a religio-cultural worldview attributed to Australian Aboriginal beliefs. It was originally used by Francis Gillen, quickly adopted by his colleague Baldwin Spencer and thereafter popularised by A. P. Elkin, who, however, later revised his views. The Dreaming is used to represent Aboriginal concepts of ''Everywhen'', during which the land was inhabited by ancestral figures, often of heroic proportions or with supernatural abilities. These figures were often distinct from gods, as they did not control the material world and were not worshipped but only revered. The concept of the Dreamtime has subsequently become widely adopted beyond its original Australian context and is now part of global popular culture. The term is based on a rendition of the Arandic word ''alcheringa'', used by the Aranda (Arunta, Arrernte) people of Central Australia, although it has been argued that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Aboriginal Sacred Site
An Australian Aboriginal sacred site is a place deemed significant and meaningful by Aboriginal Australians based on their beliefs. It may include any feature in the landscape, and in coastal areas, these may lie underwater. The site's status is derived from an association with some aspect of social and cultural tradition, which is related to ancestral beings, collectively known as Dreamtime (or the Dreaming/s), who created both physical and social aspects of the world. The site may have its access restricted based on gender, clan or other Aboriginal grouping, or other factors. The sites are protected by various state- and territory-based legislation as part of Australian heritage laws, and the federal '' Aboriginal and Torres Strait Islander Heritage Protection Act 1984'' can be invoked as a "last resort" if the site is not considered adequately covered by legislation in the jurisdiction. The legislation also protects sites of archaeological, historical and cultural signif ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poseidon Bubble
The Poseidon bubble was a stock market bubble in which the price of Australian mining shares soared in late 1969, then crashed in early 1970. It was triggered by the discovery by Poseidon Nickel of the early indications of a promising nickel deposit in September 1969. In the late 1960s, nickel was in high demand due to the Vietnam War, but there was a shortage of supply due to industrial action against the major Canadian supplier Inco. These factors pushed the price of nickel to record levels, peaking at around £7,000/ton (£113,000 in 2018 adjusted for inflation) on the London market early in November 1969. In September 1969, the mineral exploration company Poseidon NL made a major nickel discovery at Mount Windarra northwest of Laverton, Western Australia. In early September its shares, which had been trading at $0.80, began rising on insider trading (which was not illegal at the time). On 1 October, Poseidon announced that drilling had struck 40 metres of ore averaging ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trevor Sykes
Trevor William Sykes (born 14 September 1937) is an Australian finance journalist who until his retirement in 2005 wrote the Pierpont column in the Australian Financial Review ''The Australian Financial Review'' (abbreviated to the ''AFR'') is an Australian business-focused, compact daily newspaper covering the current business and economic affairs of Australia and the world. The newspaper is based in Sydney, New S .... He also wrote a number of books on prominent Australian corporate collapses and goings on. Bibliography * * References External links Pierpont web site collecting various articles etc. written by Sykes under that alter-ego 1937 births Australian columnists Living people Place of birth missing (living people) {{australia-writer-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
