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ore
ore metal-bearing mineral mass that can be profitably mined. Nearly all rock deposits contain some metallic minerals, but in many cases the concentration of metal is too low to justify mining the ore. Ores are usually found concentrated in deposits with a definite gradation of metal concentration from the ore to the surrounding rock. The ore often occurs in veins, which are ore-filled fissures in the rock. The veins vary in thickness from only fractions of an inch to several hundred feet. Minerals with no commercial value, called gangue minerals, are usually found mixed with the ore in the vein. Some veins are buried deep within the ground, but others lie close to the surface. Veins of ore exposed to weathering are often eroded and redeposited in placers and alluvial deposits, e.g., ore-bearing stream and lake gravels or beach sands. Some ores are simple chemical compounds, while others are chemically complex minerals . Important ores of aluminum , iron , manganese , and tin are oxides; important ores of antimony , copper , lead , mercury , nickel , silver , and zinc are sulfides. Some metals, called native metals, occur uncombined in nature, e.g., copper, gold , platinum , and silver. The recovery of metals from their ores is one area of the field of metallurgy . |
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"ore." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "ore." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1E1-ore.html "ore." The Columbia Encyclopedia, 6th ed.. 2008. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-ore.html |
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ore
ore OE. ōra unwrought metal (corr. to Du. oer, LG. ūr, of unkn. orig.), repr. by oor(e), (o)ure from XIV to XVII; superseded by the descendant of OE. ār = OS., OHG. ēr, ON. eir, Goth. aiz :- Gmc. *aiz, corr. to L. æs crude metal, bronze, money.
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T. F. HOAD. "ore." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. T. F. HOAD. "ore." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O27-ore.html T. F. HOAD. "ore." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-ore.html |
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ore
ore Mineral or combination of minerals from which metals and non-metals can be extracted. It occurs in veins, beds or seams parallel to the enclosing rock or in irregular masses.
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"ore." World Encyclopedia. 2005. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "ore." World Encyclopedia. 2005. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O142-ore.html "ore." World Encyclopedia. 2005. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-ore.html |
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ore
ore / ôr/ • n. a naturally occurring solid material from which a metal or valuable mineral can be profitably extracted. |
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"ore." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "ore." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O999-ore005.html "ore." The Oxford Pocket Dictionary of Current English. 2009. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-ore005.html |
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Ore
Ore E. Sussex. Ora 1121–5. ‘(Place at) the hill-slope or ridge’. OE ōra.
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A. D. MILLS. "Ore." A Dictionary of British Place-Names. 2003. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. A. D. MILLS. "Ore." A Dictionary of British Place-Names. 2003. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O40-Ore.html A. D. MILLS. "Ore." A Dictionary of British Place-Names. 2003. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O40-Ore.html |
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ore
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AILSA ALLABY and MICHAEL ALLABY. "ore." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "ore." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O13-ore.html AILSA ALLABY and MICHAEL ALLABY. "ore." A Dictionary of Earth Sciences. 1999. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-ore.html |
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ore
ore A mineral or rock that can be worked economically.
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MICHAEL ALLABY. "ore." A Dictionary of Ecology. 2004. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "ore." A Dictionary of Ecology. 2004. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O14-ore.html MICHAEL ALLABY. "ore." A Dictionary of Ecology. 2004. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-ore.html |
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ore
ore •abhor, adore, afore, anymore, ashore, awe, bandore, Bangalore, before, boar, Boer, bore, caw, chore, claw, cocksure, comprador, cor, core, corps, craw, Delors, deplore, door, draw, drawer, evermore, explore, flaw, floor, for, forbore, fore, foresaw, forevermore, forswore, four, fourscore, furthermore, Gábor, galore, gnaw, gore, grantor, guarantor, guffaw, hard-core, Haugh, haw, hoar, ignore, implore, Indore, interwar, jaw, Johor, Lahore, law, lessor, lor, lore, macaw, man-o'-war, maw, mirador, mor, more, mortgagor, Mysore, nevermore, nor, oar, obligor, offshore, onshore, or, ore, outdoor, outwore, paw, poor, pore, pour, rapport, raw, roar, saw, scaur, score, senhor, señor, shaw, ship-to-shore, shop-floor, shore, signor, Singapore, snore, soar, softcore, sore, spore, squaw, store, straw, swore, Tagore, tau, taw, thaw, Thor, threescore, tor, tore, torr, trapdoor, tug-of-war, two-by-four, underfloor, underscore, war, warrantor, Waugh, whore, withdraw, wore, yaw, yore, your
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"ore." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. "ore." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O233-ore.html "ore." Oxford Dictionary of Rhymes. 2007. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-ore.html |
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ORE
ORE occupational radiation exposure
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FRAN ALEXANDER , PETER BLAIR , JOHN DAINTITH , ALICE GRANDISON , VALERIE ILLINGWORTH , ELIZABETH MARTIN , ANNE STIBBS , JUDY PEARSALL , and SARA TULLOCH. "ORE." The Oxford Dictionary of Abbreviations. 1998. Encyclopedia.com. 10 Feb. 2012 <http://www.encyclopedia.com>. FRAN ALEXANDER , PETER BLAIR , JOHN DAINTITH , ALICE GRANDISON , VALERIE ILLINGWORTH , ELIZABETH MARTIN , ANNE STIBBS , JUDY PEARSALL , and SARA TULLOCH. "ORE." The Oxford Dictionary of Abbreviations. 1998. Encyclopedia.com. (February 10, 2012). http://www.encyclopedia.com/doc/1O25-ORE.html FRAN ALEXANDER , PETER BLAIR , JOHN DAINTITH , ALICE GRANDISON , VALERIE ILLINGWORTH , ELIZABETH MARTIN , ANNE STIBBS , JUDY PEARSALL , and SARA TULLOCH. "ORE." The Oxford Dictionary of Abbreviations. 1998. Retrieved February 10, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O25-ORE.html |
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