 | | Journal (article/letter/editorial) | | there was a clear tendencyfor $S84to be higher in pyrite than in co-existingsphalerite. Only five sphalerite:galena...againdemonstrated sulfide:sulfidefractionation. Pyrite showscomparatively low 8•S in this case, which...preciselysimilareffectin the Heath Steeledepositin Eastern Canada,and more recentlyby M. Solomonand Rafter (unpublished)in...PbSa• q- H•S ai and in either gas-solid,liquid-solidor gas-liquid-solidsystems. Alternatively it may representsomekind |  | | Journal (article/letter/editorial) | | well-cleanedjig concentrates from the Castle-Trethewey mine maintaineda very steadyaverageof silver 11.6 percent...ORE$ FRONIMILLER LAx•-O'BR•E• MI•, GOWGAND'A, CANADA. Silver .............. Lollingitc ..............adjoiningMiller Lake-O'Brien and Castle-Tretheweyminesare: pyrite, bismuth,stephanite,argentitc,and ruby silver....mineralographicstudy of the minerals of the Miller Lake-O'Brien Mine, Gowganda,Ontario: Toronto Univ. Studies,Geol. set...minerals present in the ores of the Miller LakeO'Brien mine, only a few of theseare abundant. The three most |  | Leventhal, Joel S., Grauch, R. I., Threlkeld, C. N., Lichte, F. E., Harper, C. T. (1987) Unusual organic matter associated with uranium from the Claude Deposit, Cluff Lake, Canada. Economic Geology, 82 (5) 1169-1176 doi:10.2113/gsecongeo.82.5.1169 | Journal (article/letter/editorial) | | Associatedwith Uranium from the Claude Deposit, Cluff Lake, Canada J. s. LEVENTHAL,R. I. GRAUCH,C. N. THRELKELD,F...structurallycontrolled. with tracesof Se and As) and pyrite; minor amounts 2. Wall-rock alterationconsists...1981; Bonnamyet al., 1982; Ruzicka includehematite,pyrite, pyrrhotite,marcasite,chaland LeCheminant, 1984;...surroundingthe uraniummin- CLAUDEU DEPOSIT,CLUFFLAKE,CANADA uraninite • coffinite galena uranlnlte ....As-bearinggalenaand altaitc form inclusionsin gersdor•te. Pyrite formsstringersof small(<5 t•m)anhedralgrains |  | | Journal (article/letter/editorial) | | ionic radius was first proposedby W. L. Bragg (6). I-te pointedout that althoughions have no rigid boundary...SouthernRhodesia(25), Briggs Creek, Oregon (2), and Quebec,Canada(30). Howeverthe closespatialrelationship betweenore...ratio. High grade(50% Cr20•) Oral oammunicatlon from Mine Manager. GEOLOGY AND GEOCHEMISTRY OF BASEMETALDEPOSITS...5:1 to 6: 1, and the averageof eachsection of the mine is consistent. Even units as small as hand spe.cimens...sulphur:nickel ratiois constant in all typesof oreat a single mine,whether it occurs asmassive ore,asdisseminated blebs |  | | Journal (article/letter/editorial) | | use"fluid- izedsystem, a mixtureof particles (solidor liquid) suspended byanupward escaping fluidphase...and somethat are totally replaced by silicaand pyrite, and thus are indistinguishable from someof the...and Bastin, E. S., 1922, The geology of the Braden mine, Rancagua, Chile: EcoN. GEOL., v. 17, p. 75-99....west. The west-trending sleuthingwhenhe namedthe mine? faultswere probablyinitially formedby tumescence |  | | Journal (article/letter/editorial) | | is suggestedthat the inclusionswere in eithera solidor liquidstateat the time of incorporation and that...classof ores, which are also applicableto the copper-pyrite deposits of the NorthernCaucasus andthe Urals (USSR) |  | | Journal (article/letter/editorial) | | Fe-S-O mineralshematite (hm), magnetite (rot), pyrite (py), and pyrrhotite (po). Thin dashed linesshowthe...maximumpossibleS2activityisdefinedby saturationwith solidor liquid sulfur. Phase equilibria in the Au-Ag-S-CI-H•O...differentas=-buffering assemblage. Coexistence of pyrite + pyrrhotitebuffersas=to relativelylow values,...equilibrium with, for example,the pyrite + hematite + magnetite or pyrite + bornitc + chalcopyriteassemblages...Alloy compositionsfor fluidsin equilibrium with pyrite + sphaleritehavebeen contouredfor differentvalues |  | | Report (edition) | | COVER: High grade gold specimen from the San Antonio Mine, Bissett, Manitoba. It measures 24x20x5 cm and contains...the San Antonio Mine area 21 Figure 12 Geological cross section of the San Antonio Mine area 21 Figure...Figure 13 Composite level plan of the San Antonio Mine showing '16 type' shear veins and '38 type' stockwork...7th level, San Antonio Mine 22 Figure 15 Geology of the Central Manitoba Mine area 27 Figure 16 Geology...Geology of the Gunnar Mine area 28 iv Figure 17 Longitudinal section of the Gunnar Mine 29 Figure 18 |  | | Journal (article/letter/editorial) | | ß-r' PERSHING COUNTY ... I I ;rofoot/Lewis Mine the basin 12 km north of the Crofoot-Lewismine...anddip55øto 85ø FIG. 1. Locationmapof the Crofoot-Lewis mine,HumboldtCounty, strikeapproximately Nevada, showing...Black Rock Desert t Qal Crofoot/Lewis Valley Mine Oal .:• 40ø45 ' Qal Qal Oa, 119000 ' 118030...in theSulphur district: + illitc + marcasite + pyrite+ leucoxene _+siderite. (1) propylitic,(2) interstratified...15and50percent K feldspar and minor amounts of marcasite + pyrite _ stibnite _ leucoxene Propylitic alteration and/or |  | | Journal (article/letter/editorial) | | zonalsequencetypicalof stratiformsyngenetic sulfides.At the Troy mine,thesesulfidezonescrossthe strata. Sulfidesvary in...sand cliffsin suresand in two trips to the Troy mine. In 1984 the mountainouscountry.Wehrenberg (1983)...about 1,320 m.y. Slabbedspecimens from the Troy mine and other Hence, the Ravalli Group with the Revett...havedisruptedalgal matsbeen recognized at the Mufulira mine, Zambia (Garlick, 1981), which, due to their extreme...describessuch"freckle stains"as ,so•l . ,(*TROY MINE •F BELT OUTCRO N being 5 mm in diameter on coarserquartzite |  | | Journal (article/letter/editorial) | | Mount PleasantW-Mo-Sn Deposits, New Brunswick, Canada* IAIN M. SAMSON Departmentof Geology,Universityof...mineralization,alteration,and intrusion. Montreal, Canada. 0361-0128/90/1036/145-19$3.00 145 146 IAIN...can contain MT. PLEASANTW-Mo-SnDEPOSITS,N. B. CANADA 147 graniteporphyryfragments,are spatiallyassociated...0.2 mm. MT. PLEASANT W-Mo-Sn DEPOSITS, N. B. CANADA B ß :. c . E F FIG.4. Photomicrographs of...Type 1 are liquid-rich,liquid-vaporinclusions that pyrite, tennantite,bornitc,bismuth,andbismuthinite homogenized |  | | Journal (article/letter/editorial) | | S•/g/, fides,and tellurides.Thermodynamic Se•/g/, Te•2(a/, andO2/g/. A similarapproach hasbeentakenfor...al., 1990), and coloradoitc(HgTe; Nasarand Ss/g/, Te•2(g/, andSe•2/g/are usefulmeasures of relativestability...isimportant toquantify thefugacities of O2ig/, Ss/g/, Te•2/g), and become Se•2(gl whichgovern theformation...ofkrutaite(CuSes) wascalculated at332øC, thepartial lurium(Se,Te)(340øC)mightbeusedin geothermometry. A meltingpointof...calculated by analogy with indicates thatfSe•(g), likef Te •,, .• canreachsaturation andthus ternary sulfides |  | | Journal (article/letter/editorial) | | Proterozoic Dolostone, Northern Barfin Island, Canada R. A. OLSON Trigg, Woollett,OlsonConsultingLtd...OlsonConsultingLtd., 10504-103Street,Edmonton,Alberta T5H 2V4, Canada Abstract EconomicallyimportantMississippiValley-type...Territories, of genesisfor the zinc-leadsulfide Canada, are MississippiValley type. That is, they anda...anda mechanism comprisestrata-bounddepositsof pyrite, sparrydo- depositsare proposed. lomite, and zinc and...val- 1056 Pb-Zn SULFIDEDEPOSITS,BAFFINISLAND, CANADA 1057 leys. Relief generallyexceeds600 m and locally |  | | Journal (article/letter/editorial) | | ..................... 536 Zoning at the Frood Mine ..................................................minerals with volatile elements(Pb, Zn, Sn, Bi, As, Te), mineralsof the platinum metals,native gold and... zonaldistributionof mineralsin the famousFrood mine of the Sudbury district(Fig. 1), although notedby...norite strikes about due east towards the Garson mine, and the contact is markedby a fault, bothnow dipping75oS...communication. 538 )'. E. HAWLEY ZONING AT THE FROOD MINE The Frooddepositliesat the southwestern endof the |  | | Journal (article/letter/editorial) | | sulfidestage, (3) hypogenealteration of pyrrhotite to pyrite, marcasite,and siderite and (4) late crustsand...compositionswere modified during replacementby pyrite, marcasite and siderite and most do not reflect...reflects initial equilibration with pyrrhotite or pyrite, but its significancein terms of temperatureis...Franckeite and teallite ..................... 617 617 Pyrite-marcasite-siderite................... 619 Late...Arsenopyriteis generallyof early age, preceding Pyrite is rare as an alterationproduct (Fig. 3B). pyrrhotiteand |  | | Book | | (0279) 444501. Published in the United States and Canada by St James Press, 233 East Ontario Street, Chicago...444501/454853. _’ Oo aa ee ward Te elt WA aie ea fos ory a te Perey = ee oe W« sa cise ee...447 467 491 Company Index 503 Tables: World Mine Production of Gold, Silver and Base Metals 5A2...Mining OFFICES: 5011 Meadowood Way Paradise Peak Mine Suite 300 (100% FMC Gold) * Sales Reno, Nevada...Elko, Nevada (303) 292-7500 Royal Mountain King Mine (100% FMC Gold) Copperopolis, California Beartrack |  | | Journal (article/letter/editorial) | | ch•lcocite . 903 / / copper solid soluhon / / do•en te / djurleite / dimorphite / covellite •S• ABBREVIATIONNAME...plotted in atom percent. One-phasefields appear solidor stippled(liquid), two-phasefieldsshadedby tie lines...Jr., 1964, A thermop. 238-246. dynamic study of pyrite and pyrrhotite: Geoch. et Cosmoch. Acta, v. 28 |  | | Journal (article/letter/editorial) | | reasonably be expectedto exist in contactwith a solidor nearly solidintrusive rockthathasformedbythecooling...sulfurvaporat 600ø canbe spedfled more closely. If both pyrite and pyrrhotiteare present,for example,the equilibriumSs...equilibriumconstantis simply (S•), so (Ss) = 10-x'• atm. If pyrite is presenttogetherwith ferroussilicates,a valuefor |  | | Journal (article/letter/editorial) | | The associationof sphalerite with pyrrhotite, pyrite, digenite, covelike, and barite, but not with free...course,Ps• is constantat any one T when either solidor liquid sulfur is present (Fig. 2). Oxidationstate...intermediate in composition between pyrrhotite and pyrite, and which was describedby Erd, Evans, and Richter...80øC alwaysresultedin a mixture of pyrrhotite and pyrite (Kullerud, unpublishedresearch,1957). For this...coexistingwith pyrite. Kullerud and Yoder (55) determined the upper stability curve of pyrite and presenteda |  | | Book | | pegmatites of the famous Mont Saint-Hilaire, Quebec (Canada) and geochemistry of rocks and minerals should...species),the Mont Saint-Hilaire complexin Quebec,Canada(-320 species) and the Ilimaussaqalkaline complex...Joachim Erdmann(1814-1869), whograduatedfrom the mine collegein Uppsalain 1836,and from the miningschoolin...cerium oxide obtained from cerite from the Bastnas mine. Thus,mosandrite from Laven was very close to be...businessman.Already as a student he acquired a zinc mine, and soon establisheda white-pigment factory in |
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