Iron has been known since antiquity. Iron is ubiquitous in the lithosphere as either a major constituent or in trace amounts. In abundance it ranks fourth behind oxygen, silicon and aluminum.
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Iron ores have a wide range of formation in geologic time as well as a wide geographic distribution. These ores are found in the oldest known rocks in the crust of the earth, with an age in excess of 2.5 billion years, as well as in rocks formed in various subsequent ages. In fact, iron ores are even forming today in the areas where iron oxides are being precipitated.
Several thousands of iron occurrences are known throughout the world. They range in size from a few tons to several hundreds of millions of tons. Iron ore deposits are distributed in different regions of the world under varied geological conditions and in different geological formations. The largest ore concentration is found in banded sedimentary iron formations of Precambrian age. These formations constitute the bulk of iron ore resources of the world.
Iron ores occur in a wide variety of geological environments in igneous, metamorphic or sedimentary rocks, or as weathering products of various primary iron bearing materials. Iron ores can be grouped into types of similar geological occurrence, composition and structure. The following is a simplified classification which is based on genesis of the deposits and geological environment. It shows the main modes of occurrence of iron ores as well as it illustrates the varied geology of iron ore deposits.
Prospecting involves searching an area for mineral deposits with the view to mine it at a profit. In other words to transform the mineral deposit into an ore deposit. A geologist prospecting an area is looking for surface exposure of minerals, by observing irregularities in colour, shape or rock composition. His experience tells him where to look, to have the greatest chances of success.
Exploration, while it sounds similar to prospecting, is the term used for systematic examination of a ore deposit. . It is not easy to define the point where prospecting turns into exploration. After an interesting area is chosen, an application for exploration permit is made. Approval by officials is needed before exploration activities can commence.
Land which is soil covered is inaccessible to the prospector, who first look out for an outcrop of the mineralization. Where the land cover comprises a shallow layer of alluvial material, trenches are usually dug across the mineralized area to expose the bedrock.
A prospector identifies the discovery, measure both width and length, and estimate the mineralized area. Samples from the trenches are analyzed in the laboratory. Even when minerals can be found on the surface, determining any extension in depth is a matter of qualified guesswork. If the prospector8217s findings, and his theorizing about the probable existence of an ore deposit are on solid ground then the next step is to explore the surrounding land.
Exploration is a term embracing geophysics, geochemistry, and finally the more costly activities viz drilling into the ground for obtaining samples from any depth. Fig 1 shows the general activity sequence in prospecting and exploration of an ore deposit. Efficient exploration depends on increasingly sophisticated map production for planning purpose and access routes, for geological, geophysical, geochemical and structural mapping. Today detailed aerial topographic maps are available giving the explorer basic information to determine where to find areas with good potential of ore deposit.
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Nov 20 2014018332Chinese Interests Look to Malaysia for Cheap Iron Ore and Profits Li Yang chairman and chief executive of Chinese controlled CAA Resources at a once dormant iron.
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Iron ore production in malaysia List of countries by iron ore production Wikipedia This is a list of countries by iron ore production based on US Geological Survey data The mine production estimates for China are estimated from the National Bureau of Statistics Chinas crude ore statistics rather than usable ore as reported for the other.
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Most reserves of such ore have now been depleted Iron ore is the raw material used to make pig iron which is one of the main raw materials to make steel 98 of the mined iron ore is used to make steel Indeed it has been argued that iron ore is more integral to the global economy than any other commodity except perhaps oil.
Mining Job In Iron Ore In Malaysia Britannia Mining Malaysia Iron Ore Britannia Mining Malaysia has a known iron ore reserve estimated at RM17 billion as of 2013 Its highest quality iron ore is in Bukit Besi a small town in Terengganu which is believed to hold 50 million tonnes of reserves at 70 iron content on 2 400 hectares of land.
Iron ore in Malaysia is produced from the countrys small scale mines and the low grade iron ores are used by the gas and oil sectors and also by the pipe coating industry Fossil Fuels In 2010 Malaysias oil and gas sectors profited from the increasing global energy pric.
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BUKIT BESI, Malaysia Giant mining equipment has stripped away the palm trees and other vegetation from a jungle bluff here with a Malay name that translates to Iron Hill. Huge power shovels gouge long furrows down cliffs of fuchsia clay, scooping out the shiny black iron ore at their base.
The mine here operates round the clock, seven days a week. The Chinese-controlled CAA Resources, which reopened the dormant mine early this year, has rapidly ramped up production to an annual rate of 500,000 tons, with plans to double it by next year.
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