Schroeter - Prospectors and Developers Association of Canada
Schroeter - Prospectors and Developers Association of Canada
Schroeter - Prospectors and Developers Association of Canada
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“Golden” Opportunties inBritish ColumbiaTom <strong>Schroeter</strong>, P. Eng./P. Geo.Senior Regional GeologistBC Ministry <strong>of</strong> Energy <strong>and</strong> MinesBRITISH COLUMBIAMinistry <strong>of</strong> Energy <strong>and</strong> Mines
1992–2002 2002 (Downside)• Huge decrease in exploration expenditures(i.e. $228 million in 1990 to $25 million in 1999)• Globalization (~1992) – greener pastures elswehere• Real / perceived poor business climate• Depressed metal prices• General lack <strong>of</strong> meaningful Fed./Prov. Tax incentives‣ Very little “systematic” explorationBRITISH COLUMBIAMinistry <strong>of</strong> Energy <strong>and</strong> Mines
1992–2002 2002 (Upside)• Superior database systems enhanced• Extensive network <strong>of</strong> new logging roads• Dramatic glacial retreat• “People Power” in Vancouver: Gateway to discoveries• New discoveries made‣ Great opportunitiesBRITISH COLUMBIAMinistry <strong>of</strong> Energy <strong>and</strong> Mines
2002-?? Bigger <strong>and</strong> Better Future• Metal prices recovering (esp. gold <strong>and</strong> copper)• New Gov’t tax incentives(e.g. METC <strong>and</strong> Super Flow-Through)• Vancouver: major international exploration centre• Free web based access to information (MapPlace)• Mining friendly Gov’t = improving investment climate• Lots <strong>of</strong> discoveries <strong>and</strong> new developmentsBRITISH COLUMBIAMinistry <strong>of</strong> Energy <strong>and</strong> Mines
Operating Mines In British Columbia2002Kemess South(Cu, Au)67MetalCoalEskay Creek(Au, Ag)Endako(Mo)BullmooseHuckleberry(Cu, Mo)Fording RiverGreenhillsLine CreekQuinsamMyra Falls(Cu, Zn, Au, Ag)Highl<strong>and</strong> ValleyCopper (Cu, Mo)ElkviewCoal Mountain
G O L D:G O L D:G O L D::::G O L D:G O L D:G O L D::::
Gold Production in British Columbia• Placer (1858-2001)~ 5.6 million oz• Lode (1890-2001)~ 30 million oz– Nearly 1000 lode <strong>and</strong> 100 placerdeposits– > 7 major types <strong>of</strong> deposits• Lode production for 2002~ .67 million oz
BC Lode Gold Production (1890-2001)28,588,544 ozPorphyry –calcalkalic 11%Porphyry –alkalic 6%Veins –epithermal7%VMS 13 %Skarns 15%Veins –mesothermal 48%
BC Lode Gold Resources (2002)78,433,330 ozPorphyry –alkalic 12%Sedex1%Veins –epithermal 3%Veins -mesothermal35%Porphyry –calcalkalic 44%VMS 4%Skarns 1%
Auriferous Deposits in British ColumbiaDEPOSIT TYPESGalore CreekEskay CreekKerrPremierGolden BearToodoggoneCampKemessMt. MilliganPORPHYRY – CALCALKALICPORPHYRY – ALKALICVEIN – MESOTHERMALVEIN – EPITHERMALSKARNVMS / SUBAQ. HOT SPRINGSEDEXCariboo - BarkervilleBridge RiverIsl<strong>and</strong> CopperAftonHighl<strong>and</strong> ValleyCopperMyra FallsHedley0 100 200 300Kilometres(<strong>Schroeter</strong> <strong>and</strong> Pinsent, 2000)
Top Gold Producers in BC (1890-2001)DepositBridge River CampRossl<strong>and</strong> CampHedley CampPremier CampEskay CreekGreenwood CampCariboo-BarkervilleCampIsl<strong>and</strong> CopperSnipMyra Falls CampKemessTotal for top 25 producersAu production- oz4,160,0142,685,5502,467,1022,086,2041,973,1501,285,3101,232,0641,133,8771,071,160794,634780,80725,668,427 ozAg production- oz952,0843,544,296604,52542,997,52990,121,4989,974,194149,5219,455,705414,52226,243,931792,194322,031,554 oz
Gold Resources in BC (2002)DepositAu Production- ozAu Resources- ozTotal AuProsperity9,483,7569,483,756Kemess Camp780,8078,642,4879,423,294Bridge River4,160,014447,6804,607,694Mt. Milligan4,511,6934,511,693Sulphurets Camp4,433,5934,433,593Schaft Creek4,372,7974,372,797Galore Ck Camp4,036,1054,036,105Eskay Creek1,973,1501,775,4513,748,601Rossl<strong>and</strong> Camp2,782,002502,8023,284,804Hedley Camp2,467,1026,7892,473,891Total for Top 2518,182,422 oz58,157,400 oz76,340,000 oz
Auriferous Porphyry DepositsSchaft CreekGalore CreekSulphuretsKerrRed-ChrisPineBellKemessLorraineMt. MilliganAURIFEROUSPORPHYRYDEPOSITS IN BCAlkalineCalcalkalineHuckleberryMount PolleyIsl<strong>and</strong> CopperProsperityAftonHighl<strong>and</strong> Valley CopperWillaSimilco
Cu/Mo/Au Ratios in Porphyry DepositsHighl<strong>and</strong> Valley CopperNorth <strong>and</strong> SouthAmericanPorphyry CopperDepositsCuNormal range <strong>of</strong> Cu/Auratio for Cu porphyry depositsHigher AuSouth <strong>and</strong> West PacificPorphyry CopperDepositsMt. MilliganKemessCuMoCuAuMoAu
Porphyries - Calcalkaline• Isl<strong>and</strong> Copper (1971 - 1995)– 1.14 M oz Au• Highl<strong>and</strong> Valley Copper– average 12,000 to 15,000 oz Au/yr• Kemess South (1998 - ?)– 300,000 oz Au/yr
Porphyries - CalcalkalineHIGHLAND VALLEY COPPERISLAND COPPER
KEMESS SOUTH (Au, Cu)Northgate Exploration• Continued improved mining, milling <strong>and</strong> transportationoperations significantly = first positive cash flow• 2002 Production: 282 300 oz Au, 73 million lbs Cu @ cash cost ~US$203/oz Au (net <strong>of</strong> Cu credits)• Life <strong>of</strong> mine operating costs @ US$150/oz Au(contained metals = 3.1 M oz Au <strong>and</strong> 1.6 B lbs Cu)• Milling rate = 48 000 TPD. 3 rd Qtr. production record Au. 50,300 tpd<strong>and</strong> 91% mill availability.• Jan. 1, 2002 Reserves: 132.6 MT @ 0.704 g/t Au; 0.233% Cu• Sig. Expl’n success @ Kemess North (5.5 km to N) expected toadd to overall “Kemess” mine life
KEMESS SOUTH (Au, Cu)Northgate ExplorationLooking NW over Kemess South
KEMESS SOUTH (Au, Cu)Northgate Exploration
KEMESS NORTH (Au, Cu)Northgate Exploration• 5.5 km N <strong>of</strong> Kemess South mine infrastructure• Current resource – 442 Mt @ 0.23% Cu <strong>and</strong> 0.4 g/t Au,incl. 185 Mt @ 0.275% Cu <strong>and</strong> 0.511 g/t Au• 2002: $5 million, 34 000m drilling program confirmedcontinuity <strong>and</strong> discovered Nugget zone(87 Mt @ .38g/t Au + 0.16% Cu)• Similar geol. setting to Kemess South, but withpotentially higher grades (hypogene)
KEMESS NORTH (Au, Cu)Northgate ExplorationNugget ZoneOpenInferred Resource ~ 6.6 M oz Au2.4 B lbs Cu
Porphyries – CalcalkalicRe-evaluations evaluations in progress / planned• Kerr/Sulphurets Gold(Nor<strong>and</strong>a)• Willa (Orphan Boy)• Schaft Creek(TeckCominco / ??)• Gibraltar (Taseko Mines)
Porphyry Cu+/+/-Au+/+/-PdPd - Alkaline66 GoldZoneSouthernStar ZoneDWBX-WBXZoneMBX Zone
Porphyries – Alkaline• Galore Creek (Kennecott / Anglo American)– 284 Mt @ .67% Cu + .38 g/t Au, includingCentral Zone 125 Mt @ 1.06% Cu, .4 g/t Au + 7.7 g/t Ag
Porphyries – Alkalinev Mt. Milligan• Resource: 445 Mt @ .415 g/t Au + .215% Cu• Reserve: 257 Mt @ .51 g/t Au + .24% Cu(3.21 M oz Au + 1.1 B lbs Cu)• Mine Development Certificate (Placer Dome)• Bioleaching potential?
Porphyries – AlkalineMt. MilliganDeposits
Porphyries – Alkalinev Afton (Cu, Au, Pd) - DRC Resources• 34.3 million tonnes @ 1.55% Cu, 1.14 g/t Au, 3.42g/t Ag <strong>and</strong> 0.125 g/t Pd outlined prior to 2002• 2002 Drilling: 25 ddh ~ 10 000 metres• Mineralization traced > 1000m length <strong>and</strong> depths> 300m <strong>and</strong> extended to NE <strong>and</strong> SW• Pre-feasibility study in progress
AFTON ( Cu, Au, Pd)DRC Resources
Porphyries – Alkalinev Lorraine (Cu, Au) - Eastfield Resources• Large Alkaline Porphyry Copper–Gold target; strike length<strong>of</strong> known mineralization > 1.4km• 3 ‘centres’ <strong>of</strong> mineralization (Upper Main, Lower Main <strong>and</strong>Bishop zones) may coalesce <strong>and</strong> continue to depth• DDH–01–60 intersected 113 m @ 0.76% Cu & 0.49g/t Au• 1998 resources: 32 MT @ 0.66% Cu <strong>and</strong> 0.17 g/t Au•Revision expected in 2003
LORRAINE (Cu, Au)Eastfield ResourcesLower Main ZoneUpper Main Zone
Auriferous Massive Sulphide DepositsTulsequah ChiefEskay CreekGr<strong>and</strong>ucAURIFEROUS MASSIVESUPHIDE DEPOSITS IN BCVOLCANOGENICBesshiCyprusKurokoSub-aqueous Hot-springGoldstreamSEDIMENTARY EXHALATIVEMyra FallsBritanniaSullivan
ESKAY CREEK (Au, Ag)Barrick Gold• ‘World-Class’ sub-aqueous hot-spring deposit type• 2002 Production: 366 000 oz Au, 16 M oz Ag• > than $1 800 per tonne (5 th largest Ag producer)• Cash operating cost ~ US$ 51/oz. Au, net <strong>of</strong> Ag credits• Jan. 1, 2002 Reserves:a) Direct Ship – 705 200 @ 65.5 g/t Au <strong>and</strong> 3036 g/t Agb) Mill – 761 800 @ 25.8 g/t Au <strong>and</strong> 1092 g/t Ag• Total inventory ~ 7.3 M oz. gold equivalent Mine Life: mid - 2008• Sig. drill intersection in FW rhyolite (22 zone): 64.1 g/t Au Equiv. over4.7m (part <strong>of</strong> 80.1m zone @ 6.2 g/t Au Equiv.)
ESKAY CREEK (Au, Ag)Barrick GoldLooking SW over Eskay Creek
ESKAY CREEK (Au, Ag)Barrick GoldEskay Creek Subaqueoushot-spring deposit model
ESKAY CREEK (Au, Ag)Barrick Gold
ESKAY CREEK (Au, Ag)Barrick GoldFinely b<strong>and</strong>ed oreBedded / laminated oreFolded oreBroken ore
FOREMORE (Pb,, Zn, Ag, Au, Cu)Roca Mines Inc.• Polymetallic volcanic-hosted massive sulphide• Devonian age (~ 350 Ma)• New discovery: SG zone• Alteration: Quartz, sericite, carbonate• Ore mineralogy: PbS, ZnS, py, cpy, tetrahedrite• Recent ice/snow melt = new exposures
FOREMORE - SG Zone
FOREMORE (Pb,, Zn, Ag, Au, Cu)Roca Mines Inc.SG Zone
MYRA FALLS (Cu, Zn, Au, Ag)Boliden-Westmin(<strong>Canada</strong>) Ltd.• 6 km long trend <strong>of</strong> VMS deposits,total inventory <strong>of</strong> ore > 30 Mt• Since 1996: > 22 Mt milled, > 800,000 oz Au,26 M oz Ag, 46 M kg Cu plus Pb + Zn• Looking for investment to increase production
MYRA FALLS (Cu, Zn, Au, Ag)Boliden-Westmin
Auriferous Mesothermal Vein DepositsPolarisTakuJohnnyMountainPorcher Isl<strong>and</strong>TaurusTable MtnSnipRed MountainEquity SilverSELECTED AURIFEROUSMESOTHERMAL VEINDEPOSITS IN BCCariboo - BarkervilleSurf InletZeballosNorthairHarrison GoldBridge RiverElkYmirSheep CreekRossl<strong>and</strong>Greenwood veinsCoquihalla
Designated PlacerAreasHistoric GoldMining CampsPremierCaribooRossl<strong>and</strong>SheepCreekBralorneHedleyGreenwood
Bralorne - Pioneer• ~ 4.2 M oz produced• Current exploration, future mine development
CARIBOO GOLD QUARTZ (Au)International Wayside• Target: Auriferous replacement <strong>and</strong> vein mineralization• 2002 drilling tested several targets between the Bonanza Ledgezone <strong>and</strong> Mosquito Creek Gold mine.• Total indicated resource for the Bonanza Ledge, BC vein, <strong>and</strong>Cow Mountain (Saunders, Pinkerton <strong>and</strong> Rainbow zones)= 6 645 600 tonnes @ 2.67 g/t Au• Total inferred resource = 1 858 000 tonnes @ 2.02 g/t Au• IWA preparing to re-enter the Environmental AssessmentProcess• Examining the possibility <strong>of</strong> open-pit mining all 3 areas, usinga central milling facility
CARIBOO GOLD QUARTZ (Au)International Wayside
CARIBOO GOLD QUARTZ (Au)International Waysidevein mineralizationreplacementmineralization
British Columbia Epithermal Model1985
Auriferous Epithermal Vein DepositsEngineerPaydirtSulphurets(BrucejackLake, Goldwedge)Golden BearHankTodd CreekToodoggoneCampSELECTED AURIFEROUSEPITHERMAL VEINDEPOSITS IN BCSpecognaPremierNew MoonLinquistTsachaBlackdomeWatson BarBrettMountWashingtonVaultDusty Mac
Toodoggone DistrictAl
Toodoggone District
TOODOGGONE DISTRICTLawyers Mine• 1989 millfeed – 0.32 opt Au & 7.24 opt Ag]• ’89 Original Reserve ~ 1.4MT @ 0.208 opt Au & 7.08 opt Ag
TOODOGGONE DISTRICTAl (Ranch)Thesis zonesBV
Toodoggone - AL (Ranch)36.8 ft @ 1.54 oz/t72.8 ft @0.81 oz/t
GOLDEN BEAR (Au)Wheaton River Minerals•Carlin - type deposit; localized high-grade native Au•Very successful seasonal (5 months) HEAP LEACH•Total heap leach prod. (1996 – 2001) = 265 000 oz Auat a cash cost <strong>of</strong> ~ $US 170/oz Au•Production peaked in 2000 at 94 000 oz Au•Good regional exploration potential
GOLDEN BEAR (Au)Wheaton River MineralsUrsa lst brecciaUrsa visible goldUrsa pit
Interior Plateau
INTERIOR PLATEAU- ClisbakoClassic epithermal textures
THORN (Ag, Au, Cu)Rimfire / First Au Strategies• High sulphidation epithermal vein / breccia(El Indio, Chile target – 6.2 M oz Au + 2 B lbs Cu)• > 30 massive sulphide veins, quartz-sulphideveins <strong>and</strong> vuggy silica-alunite veins over 5 x 5km area• Hosted by late Cretaceous granodiorite stock• Discovery <strong>of</strong> Oban Breccia pipe in 2002• Surface samples incl. 22.1 g/t Au <strong>and</strong> 2413 g/tAg (Tamdhu Vein)
THORN132 o 48’ WProperty Geology2 km1 mileLa Jaune CreekCamp CreekTHORNPROPERTYCirqueZone58 o 33’ NThornZoneOutlaw SoilAnomaly
High Sulphidation Veins (Sulphide-rich)2.1 m <strong>of</strong> 1.26% Cu,4.2 g/t Au, 320 g/t AgTamdhu VeinGrab -20.39 g/t Au,2580 g/t Ag, 23.9% CuGlenlivetVein12.05% Cu22.1 g/t Au2413 g/t Ag5 metresGrab – 2.97 g/t Au,1298 g/t Ag, 12.4% Cu15 cm
Oban Breccia Mineralization1.85 g/t Au, 1983 g/t Ag14.2% Pb, , 0.3% Zn1.92 g/t Au, 3206 g/t Ag,24.8% Pb, 19.6% Zn
KENA (Au)Sultan / Kinross• Approximately 20 km S <strong>of</strong> Nelson, by road• NEW intrusion-related gold prospect; one <strong>of</strong> five Au ± Cuzones within a 6 km long gold-in-soil anomaly• ‘Favourable’ Silver King monzodiorite porphyry traced for17 km; associated minerals – native Au, py, cpy, magnetite• Metallurgical tests indicate gold is non-refractory, withestimated recoveries 92-97%• Potential for large-tonnage, potentially heap leachable goldoperation, <strong>and</strong> high-grade (>1 opt Au) vein mining.
KENA (Au) - Sultan / Kinross
“BC – A Good GREATPlace toExplore <strong>and</strong> Develop”BRITISH COLUMBIAMinistry <strong>of</strong> Energy <strong>and</strong> Mines
‘Golden Opportunities’• Access to superior databases- e.g. MapPlace at www.em.gov.bc.ca/geology• GSB Geoscience Partnership Program• Gov’t tax incentive programs, e.g. METC <strong>and</strong> Super Flow-Through - net cost <strong>of</strong> $1000 investment = $383 – 2 nd lowest in<strong>Canada</strong>• Mining friendly Gov’t = Improving investment climate.• Infrastructure - roads, rail, ship, power• People - world leaders in expl’n/mining• $ - access to markets• Dramatic glacial retreat in past decade
Hope you find a pot <strong>of</strong> gold or whatever your target may be!