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Topic: Coffinite

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	Alpha Track - Uranium Mineralization Concepts
		Primary minerals other than uraninite and coffinite are a group containing niobium, columbium, tantalum, and titanium which are known as multiple oxides of uranium.
		Coffinite is an important uranium ore mineral and is frequently found together with uraninite.
		These secondary minerals are formed when uraninite and coffinite oxidize in the presence of iron or copper sulfides, in the absence of vanadium, phosphate or arsenic.
	alphatrack.ca /main/UMC.html (2754 words)

	Coffinite
		Occurrence - The Coffinite occurs in an unremarkable sandstone.
		Coffinite occurs in direct contact with the silica of the sandstone.
		Appearence - The Coffinite occurs as small grains filling the interstities between the sand grains of the sandstone.
	www.uraniumminerals.com /UTh/Coffinite.htm (340 words)

	Coffinite (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-29)
		The Coffinite content of the specimen changes the sandstone's usual grayish-tan color to a charcoal fl.
		Coffinite, contains no hot radicals (anions having a -1 valence), but it is not a Uranyl mineral, and therefore is exempt from the hot radicals theory.
		The Coffinite often gives the appearence of broken fl glass, but also as a viteous fl coating on some quartz grains.
	www.uraniumminerals.com.cob-web.org:8888 /UTh/Coffinite.htm (340 words)

	Coffinite - Wikipedia, the free encyclopedia
		Coffinite is a uranium bearing silicate mineral: U(SiO
		It is a glass-like fl material, dark brown or pale-brown in color, possibly with grayish fl streaks.
		The hardness of coffinite is between 5 and 6.
	en.wikipedia.org /wiki/Coffinite (110 words)

	Uranium - MSN Encarta
		Most of the uranium mined in the United States is obtained from carnotite occurring in Colorado, Utah, New Mexico, Arizona, and Wyoming.
		A mineral called coffinite, discovered in 1955 in Colorado, is a high-grade ore containing nearly 61 percent uranium.
		Coffinite deposits were found subsequently in Wyoming and Arizona and in several foreign countries.
	encarta.msn.com /encyclopedia_761557628_2/Uranium.html (401 words)

	PETROGRAPHY AND URANIUM MINERALOGY OF SC DHEC WELL CORE, JENKINS BRIDGE ROAD, NEAR SIMPSONVILLE, SOUTH CAROLINA
		Uraninite and coffinite are the principal U-rich minerals in the core.
		Coffinite is present as tiny crystals dispersed along microscopic fractures in the granite and pegmatite, plus along the slickenlined fault plane.
		Coffinite is sometimes intergrown with its Th-bearing analogue, thorogummite.
	gsa.confex.com /gsa/2004AM/finalprogram/abstract_77524.htm (459 words)

	Rozna
		Pitchblende and coffinite occur as massive aggregates, often with colloform structure.
		The alteration of rocks connected with the youngest mineralisation stage (albite - chlorite - coffinite) is easily visible as reddening of the rocks.
		Original uranium minerals are replaced by coffinite, quartz, radioactive harmotome (rich in radium), clay minerals and uranophane.
	ic.century.cz /rozinka2.htm (3214 words)

	Olympic Dam Ores
		Thin NW-trending exsolution lamellae of chalcopyrite are present throughout the bornite, and they can be recognized in the photomicrograph with difficulty since they are at the limit of resolution (1 µm) of the microscope.
		Coffinite Cof; bluish grey) is the most common uranium mineral replacing the bornite.
		It appears to have a bluish tint due to the presence of very fine-grained covellite that is disseminated throughout the coffinite.
	web.umr.edu /~rhagni/olyd.html (759 words)

	Coffinite
		Paired substitution of Y and P in coarse-grained coffinite from the Upper Jurassic Morrison Formation in the Grants uranium region, northwestern New Mexico, indicates that coffinite forms an isomorphous series with xenotime, which is...
		Coffinite is a uranium bearing silicate mineral: U(SiO4)1-x(OH)4x...
		Coffinite is present as tiny crystals dispersed along microscopic fractures...
	www.toprocks.net /MineralList/21/Coffinite.asp (563 words)

	URANIUM. The Columbia Encyclopedia: Sixth Edition. 2000 (Site not responding. Last check: 2007-10-29)
		The most important is pitchblende, mined in the Congo River basin and NW Canada.
		Coffinite (a uranium silicate) and carnotite (a potassium uranate-vanadate) are important minerals found in Colorado and Utah.
		Ores with as little as 0.1% uranium are mined and processed.
	www.bartleby.com /aol/65/ur/uranium.html (664 words)

	Uranium (U) (Site not responding. Last check: 2007-10-29)
		Most of the uranium mined in the U.S. is obtained from carnotite found in Colorado, Utah, New Mexico, Arizona and Wyoming.
		Coffinite (a high-grade ore) was discovered in 1955 in Colorado and contains nearly 61% uranium.
		Coffinite deposits have now been found in Wyoming, Arizona and several foreign countries.
	www.bayerus.com /msms/fun/pages/periodic/uranium/index.html (284 words)

	Amazon.com: Coffinite: Books (Site not responding. Last check: 2007-10-29)
		Uranium ore in the Mariano Lake--Lake Valley cores and the genesis of coffinite in the Grants uranium region, New Mexico (Evolution of sedimentary basins--San Juan Basin) by Paula L Hansley (Unknown Binding - 1988)
		Coffinite, a uranous silicate with hydroxyl substitution: A new mineral (Trace elements investigations report) by L. R Stieff (Unknown Binding - 1955)
		Tyuyamunite and metatyuyamunite, coffinite, and pitchblende are other important minerals of uranium in the...
	www.amazon.com /s?ie=UTF8&keywords=Coffinite&tag=httpexplaguid-20&index=books&link_code=qs&page=1 (759 words)

	Maybelle River Petrological Report (Site not responding. Last check: 2007-10-29)
		Only one sample is distinctly radioactive (300 times background) due to the presence of coffinite.
		The only distinctly radioactive sample carries coffinite, pyrite, rammelsbergite, ilmenite, possibly magnetite,; coffinite is a very late phase; this sample is very strongly altered and also tectonized; alteration minerals are ?kaolinite, chlorite, sericite, anatase, limonite.
		Mineral core from the project is available for examination at the Mineral Core Research Facility, Edmonton.
	www.ags.gov.ab.ca /publications/ABSTRACTS/MIN_19880002.html (604 words)

	Coffinite Mineral Data
		Comments: Black, interstitial coffinite cementing a sub-angular quartzose sandstone.
		Coffinite is Radioactive as defined in 49 CFR 173.403.
		Weight of pure Coffinite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.44 gm/cc.
	www.webmineral.com /data/Coffinite.shtml (264 words)

	Dáil Éireann - Volume 165 - 27 February, 1958 - Ceisteanna—Questions. Oral Answers. - Coffinite Deposits.
		Dillon asked the Minister for Industry and Commerce whether any deposits of coffinite have been discovered in Ireland; and whether the discovery of this mineral in Cornwall suggests the probability of its occurring in similar geological surroundings here.
		Lemass: No deposits of coffinite have been discovered in Ireland.
		The discovery of this mineral in Cornwall would not suggest the probability of its occurrence in this country, as there are no mineralised areas here similar in geological structure to those in Cornwall.
	www.oireachtas-debates.gov.ie /D/0165/D.0165.195802270012.html (101 words)

	Roll-Front Uranium Deposits
		Hydrogen sulfide gas is a strong reductant, so uranium will precipitate from solution upon encountering the reducing conditions created by H2S gas.
		Sometimes, wood, peat, lignite, and hydrocarbons are completely replaced by fl uranium oxides, usually as uraninite (pitchblende) or coffinite.
		Exceptions could be where uraninite or coffinite is so newly-formed that radioactive daughter products have not yet formed.
	www.icmj2.com /03Oct/03OctFeature.htm (763 words)

	REE Geochemistry of the Uranium Phases in Syn
		These include the syn-magmatic type, hosted by part of the Suryamalai or Sankari granite in the Kullampatti area, Tamil Nadu and hydrothermal vein type, hosted by both basement granitoid and its overlying Shahabad Limestone in the Bhima basin at Gogi, Karnataka.
		Pitchblende in both granite and limestone shows perceptible positive Ce-anomaly whereas the coffinite in limestone shows negative Ce-anomaly.
		During coffinitisation of pitchblende or replacement of coffinite by pitchblende, there is a similar depletion, especially the LREE in the former and the MREE in the latter.
	www.bestindia.com /jgsi/Jul_p02.htm (377 words)

	Rediff On The NeT: High quality uranium discovered in Karnataka
		This led to the discovery of high order radioactivity with values up to 0.12 per cent in one of the bore wells.
		Subsequent core drilling has confirmed mineralisation in the form of uranite and coffinite stone near granite contact, he added.
		He said uranium mineralisation was also controlled by a fault in the granite basement in the peripheral parts of the basin.
	www.rediff.com /news/jul/17atom.htm (690 words)

	PIRSA Minerals - Mineral Resource Potential - Uranium (Site not responding. Last check: 2007-10-29)
		), brannerite (oxide of uranium, rare earths, iron and titanium) and coffinite (uranium silicate).
		Mineralisation, which occurs at depths of 100–130 m, is separated from Cretaceous sediments of the Great Artesian Basin by at least 100 m of dense plastic clay (Alpha Mudstone).
		The principal ore mineral is coffinite, a uraniferous hydrosilicate thought to have been derived by leaching of primary mineralisation in the Mount Painter Inlier, 12 km to the west.
	www.pir.sa.gov.au /pages/minerals/commodity/uranium.htm (1082 words)

	SME--VIRTUAL ATLAS OF OPAQUE AND ORE MINERALS (Site not responding. Last check: 2007-10-29)
		The carbon is surrounded by a coffinite-rich area (light grey, centre top) enclosing pyrite.
		(light grey, bottom centre) form a leucoxene aggregate and have higher reflectance than coffinite and zircon (dark grey, bottom right) which is also fractured.
		Two euhedral crystals of pyrrhotite (brown-yellow, bottom left) have nucleated upon a detrital pyrite grain.
	www.smenet.org /opaque-ore/plate46c.htm (132 words)

	[No title]
		Under oxidizing conditions (i.e., above the coffinite region in Figure 7-1), uranium is present as soluble uranyl species U(VI) (oxidation state of +6).
		When reducing conditions exist, the pe is low (i.e., in or below the coffinite region in Figure 7-1).
		This normally corresponds to anaerobic conditions typical of deep groundwater and eutropic surface waters such as swamps, wetlands, nutrified lakes, and polluted rivers.
	www.fas.org /man/dod-101/sys/land/docs/chapter7.html (9836 words)

	Prospect Uranium, Inc. - Sandoval Project - Tue Dec 12, 2006
		The uranium deposits occur at localities where finely dispersed carbonaceous material is the primary control of uranium mineralization.
		The principle uranium minerals are coffinite and uraninite.
		In the Marquez subdistrict (Sandoval Property) the ore bodies are primary type ore deposits.
	www.prospecturanium.com /s/Sandoval.asp (616 words)

	www.mineweb.net \| co_releases Energy Metals (Site not responding. Last check: 2007-10-29)
		Uranium and vanadium mineralization occurs as disseminated uranium and vanadium and as replacements in carbonized plant remains within the Salt Wash member of the Jurassic Morrison formation.
		The ore minerals are carnotite, coffinite and minor uranite.
		Historically, the individual lenticular orebodies previously mined have ranged from 1,000 to 65,000 tons.
	www.mineweb.net /co_releases/455423.htm (465 words)

	Nuclear Decommissioning - Lakeview Mill
		Individual ore deposits are up to 150 feet in thickness, and ore was explored to a depth of 600 feet below the surface.
		Shallow ore consists principally of secondary uranium minerals and the deeper ore of coffinite associated with base-metal sulfide minerals.
		Steeply dipping and cross-cutting normal faults have cut the ore-bearing Pliocene sequence into large blocks that are displaced and tilted.
	www.eia.doe.gov /cneaf/nuclear/page/umtra/lakeview_title1.html (1577 words)

	Geology of Uranium Deposits
		Conventional mining/milling operations of sandstone deposits have been progressively undercut by cheaper in situ leach mining methods.
		A large variety of secondary uranium minerals is known, many are brilliantly coloured and fluorescent.
		The commonest are gummite (a general term like limonite for mixtures of various secondary hydrated uranium oxides with impurities); hydrated uranium phosphates of the phosphuranylite type, including autunite (with calcium), saleeite (magnesian) and torbernite (with copper); and hydrated uranium silicates such as coffinite, uranophane (with calcium) and sklodowskite (magnesian).
	www.uic.com.au /nip34.htm (1907 words)

	In Situ Leach Mining of Uranium
		Such deposits were formed by the lateral movement of groundwater bearing oxidised uranium minerals through the aquifer, with precipitation of the minerals occurring when the oxygen content decreased, along extensive oxidation-reduction interfaces.
		The uranium minerals are usually uraninite (oxide) or coffinite (silicate) coatings on individual sand grains.
		The ISL process essentially reverses this ore genesis, in a much shorter time frame.
	www.uic.com.au /nip40.htm (1739 words)

	BBX Marketwatch
		These ore bodies are commonly low to medium grade (0.05 - 0.4% U3O 8) and are small to medium in size (ranging up to a maximum of 50,000 t U3O 8).
		The primary uranium minerals discovered are uraninite and coffinite.
		When permeable sandstone exists within such ore bodies, large conventional mining/milling operations have consistently been replaced by less expensive In Situ Leach (ISL) mining methods.
	www.bbxmarketwatch.net (2884 words)

	For All of Us / One America Committee Blog
		For about $12.00 you to can buy uranium.
		These samples of Coffinite are a good example of Coffinite Grains in a granular sand matrix.
		Standard Mineralogical Data is as follows for the Grains of Coffinite -
	blog.oneamericacommittee.com /print/2006/6/11/1784/51218 (186 words)

	Brannerite
		are discussed: uraninite = pitchblende UO2, coffinite USiO4 and brannerite~UTiO6.
		stage containing uraninite, coffinite and brannerite as the most important U minerals...
		NOTE: Please contact us right away if you'd like to make any changes to your listing.
	www.toprocks.net /MineralList/12/Brannerite.asp (352 words)

	OTC Bargains- Serving the SmallCap Investor - UREX (Site not responding. Last check: 2007-10-29)
		Uranium averages about two parts per million of the earth's crust.
		Uranium is found as an oxide, uraninite, or mixed oxide, pitchblende or complex salt such as brannerite (oxide of uranium, rare earths, iron and titanium), coffinite (uranium silicate) and carnotite (hydrated potassium uranyl vanadate).
		Chemical symbol for uranium is "U" Where is Uranium Found?
	www.otcbargains.com /urex (1586 words)

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