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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.. . Encyclopedia.com. 15 Dec. 2017 <http://www.encyclopedia.com>.

"ore." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (December 15, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/ore

"ore." The Columbia Encyclopedia, 6th ed.. . Retrieved December 15, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/ore

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 by oor(e), (o)ure from XIV to XVII; superseded by the descendant of OE.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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"ore." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 15 Dec. 2017 <http://www.encyclopedia.com>.

"ore." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (December 15, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/ore-4

"ore." The Concise Oxford Dictionary of English Etymology. . Retrieved December 15, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/ore-4

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. . Encyclopedia.com. 15 Dec. 2017 <http://www.encyclopedia.com>.

"ore." World Encyclopedia. . Encyclopedia.com. (December 15, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/ore

"ore." World Encyclopedia. . Retrieved December 15, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/ore

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. . Encyclopedia.com. 15 Dec. 2017 <http://www.encyclopedia.com>.

"ore." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (December 15, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/ore-2

"ore." The Oxford Pocket Dictionary of Current English. . Retrieved December 15, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/ore-2

ore

ore A mineral or rock that can be worked economically.

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"ore." A Dictionary of Earth Sciences. . Encyclopedia.com. 15 Dec. 2017 <http://www.encyclopedia.com>.

"ore." A Dictionary of Earth Sciences. . Encyclopedia.com. (December 15, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/ore

"ore." A Dictionary of Earth Sciences. . Retrieved December 15, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/ore

ore

ore A mineral or rock that can be worked economically.

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"ore." A Dictionary of Ecology. . Encyclopedia.com. 15 Dec. 2017 <http://www.encyclopedia.com>.

"ore." A Dictionary of Ecology. . Encyclopedia.com. (December 15, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/ore-0

"ore." A Dictionary of Ecology. . Retrieved December 15, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/ore-0

ore

oreabhor, 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. . Encyclopedia.com. 15 Dec. 2017 <http://www.encyclopedia.com>.

"ore." Oxford Dictionary of Rhymes. . Encyclopedia.com. (December 15, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/ore-1

"ore." Oxford Dictionary of Rhymes. . Retrieved December 15, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/ore-1

ORE

ORE occupational radiation exposure

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"ORE." The Oxford Dictionary of Abbreviations. . Encyclopedia.com. 15 Dec. 2017 <http://www.encyclopedia.com>.

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"ORE." The Oxford Dictionary of Abbreviations. . Retrieved December 15, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/ore