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Comstock Mine
Comstock mining operation in West Coast, Tasmania is at mine site is situated 4 km west of the township of Zeehan along Trial Harbour Road and neighbours the Avebury Nickel mine a further 4 kilometres to the south-west. Mine The Comstock lead, zinc mine is an operating and producing mine. The Comstock area is held under mining lease 5M/2007 covering over 245 hectares. The mine consists of a gravity processing plant, tailings dam, offices, access roads, power lines and a number of open cut pits. These open cuts were the result of previous mining operations and most run north-east with one having a dog-leg to the north. At its deepest point, the Alisons open cut is around 30 metres below the surface. Historical Mining in the Comstock District between the Heemskirk Granite, and the township of Zeehan; an area of approximately 65 km2, commenced in the late 1880s after the discovery of silver, lead veins and continued through until 1914. In the 1940s interest surged agai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Coast, Tasmania
The West Coast of Tasmania is mainly isolated rough country, associated with wilderness, mining and tourism. It served as the location of an early convict settlement in the early history of Van Diemen's Land, and contrasts sharply with the more developed and populous northern and eastern parts of the island state. Climate The west coast has a much cooler and wetter climate when compared to the east coast. Frequent low pressure systems hit the west coast causing heavy rain, snow, and ice. The West Coast Range blocks these systems from impacting the east, therefore making the West Coast a rain catchment with some areas receiving over of rain a year. In winter temperatures at sea level hover around , and when not raining, morning frost is common. The temperatures are much lower inland from the coast with maximums in winter often failing to surpass . Typically, the snow line in winter is around 900 metres (3000 ft), however sea level snow falls several times each winter as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeehan
Zeehan is a town on the west coast of Tasmania, Australia south-west of Burnie. It is part of the West Coast Council, along with the seaport Strahan, and neighbouring mining towns of Dundas, Rosebery and Queenstown. History The greater Zeehan area was inhabited by the indigenous Peerapper and Tommeginne clans of the North West group for over 10,000 years prior to the British colonisation of Tasmania. They were greatly coastal peoples, residing in small numbers on a diet consisting of muttonbirds, seals, swan eggs and cider gum, and constructed bark huts when strong westerly winds brought about rain and icy temperatures. European naming On 24 November 1642, Dutch explorer Abel Tasman became the first European explorer to sight and document the Heemskirk and West Coast Ranges. Tasman sailed his ships close to the coastal area which today encompasses the Southwest Conservation Area, south of Macquarie Harbour, but was unable to send a landing party ashore due to poor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead
Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is toxic, even in small amounts, especially to children. Lead is a relatively unreactive post-transition metal. Its weak metallic character is illustrated by its amphoteric nature; lead and lead oxides react with acids and bases, and it tends to form covalent bonds. Compounds of lead are usually found in the +2 oxidation state rather than the +4 state common with lighter members of the carbon group. Exceptions are mostly limited to organolead compounds. Like the lighter members of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinc
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. In some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size.The elements are from different metal groups. See periodic table. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc is refined by froth flotation of the ore, roasting, and final extraction using electricity ( electrowinning). Zinc is an essential trace element for humans, animals, plants and for microorganisms and is necessary for prenatal and postnatal development. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver
Silver is a chemical element with the Symbol (chemistry), symbol Ag (from the Latin ', derived from the Proto-Indo-European wikt:Reconstruction:Proto-Indo-European/h₂erǵ-, ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc Refining (metallurgy), refining. Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes bimetallism, alongside gold: while it is more abundant than gold, it is much less abundant as a native metal. Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine". As one of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Examiner (Tasmania)
''The Examiner'' is the daily newspaper of the city of Launceston and north-eastern Tasmania, Australia. Overview ''The Examiner'' was first published on 12 March 1842, founded by James Aikenhead. The Reverend John West was instrumental in establishing the newspaper and was the first editorial writer. At first it was a weekly publication (Saturdays). The Examiner expanded to Wednesdays six months later. In 1853, the paper was changed to tri-weekly (Tuesdays, Thursdays and Saturdays), and first began daily publication on 10 April 1866. This frequency lasted until 16 February the next year. Tri-weekly publication then resumed and continued until 21 December 1877 when the daily paper returned. Associated publications ''The Weekly Courier'' was published in Launceston by the company from 1901 to 1935. Another weekly paper (evening) ''The Saturday Evening Express'' was published between 1924 and 1984 when it transformed into ''The Sunday Examiner'' a title which continues to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassiterite
Cassiterite is a tin oxide mineral, SnO2. It is generally opaque, but it is translucent in thin crystals. Its luster and multiple crystal faces produce a desirable gem. Cassiterite was the chief tin ore throughout ancient history and remains the most important source of tin today. Occurrence Most sources of cassiterite today are found in alluvial or placer deposits containing the weathering-resistant grains. The best sources of primary cassiterite are found in the tin mines of Bolivia, where it is found in crystallised hydrothermal veins. Rwanda has a nascent cassiterite mining industry. Fighting over cassiterite deposits (particularly in Walikale) is a major cause of the conflict waged in eastern parts of the Democratic Republic of the Congo. This has led to cassiterite being considered a conflict mineral. Cassiterite is a widespread minor constituent of igneous rocks. The Bolivian veins and the 4500 year old workings of Cornwall and Devon, England, are concentrated in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form ( native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western Tasmania
The West Coast of Tasmania is mainly isolated rough country, associated with wilderness, mining and tourism. It served as the location of an early convict settlement in the early history of Van Diemen's Land, and contrasts sharply with the more developed and populous northern and eastern parts of the island state. Climate The west coast has a much cooler and wetter climate when compared to the east coast. Frequent low pressure systems hit the west coast causing heavy rain, snow, and ice. The West Coast Range blocks these systems from impacting the east, therefore making the West Coast a rain catchment with some areas receiving over of rain a year. In winter temperatures at sea level hover around , and when not raining, morning frost is common. The temperatures are much lower inland from the coast with maximums in winter often failing to surpass . Typically, the snow line in winter is around 900 metres (3000 ft), however sea level snow falls several times each winter as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface Mines In Australia
A surface, as the term is most generally used, is the outermost or uppermost layer of a physical object or space. It is the portion or region of the object that can first be perceived by an observer using the senses of sight and touch, and is the portion with which other materials first interact. The surface of an object is more than "a mere geometric solid", but is "filled with, spread over by, or suffused with perceivable qualities such as color and warmth". The concept of surface has been abstracted and formalized in mathematics, specifically in geometry. Depending on the properties on which the emphasis is given, there are several non equivalent such formalizations, that are all called ''surface'', sometimes with some qualifier, such as algebraic surface, smooth surface or fractal surface. The concept of surface and its mathematical abstraction are both widely used in physics, engineering, computer graphics, and many other disciplines, primarily in representing the surfaces ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
