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KenexKenex
New Discoveries Using Spatial New Discoveries Using Spatial Analysis in GISAnalysis in GIS
Exploration in the Digital AgeExploration in the Digital Age
Acknowledging: Kenex, Auzex Resources, Aurora Minerals, HPD New Zealand, Garry Raines and Graeme Bonham-Carter
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KenexKenexTalking About Passion!!Talking About Passion!!
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KenexKenexFinding New Deposits is Hard !!Finding New Deposits is Hard !!
●● Current Business Models Don’t Current Business Models Don’t Work and Limit the FutureWork and Limit the Future
●● Lack of Understanding of The Lack of Understanding of The Exploration Value ChainExploration Value Chain
●● Mining is Often Not Where Mining is Often Not Where Value is CreatedValue is Created
●● Competitive Advantage Competitive Advantage –– Ideas Ideas and People (Skills Shortage)and People (Skills Shortage)
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KenexKenexRequirements for SuccessRequirements for Success●● Data, Information, Knowledge, Data, Information, Knowledge,
Technology and ManagementTechnology and Management●● The Key is an Integrated The Key is an Integrated
ApproachApproach●● Prospectivity and Exploration Prospectivity and Exploration
Value ChainValue Chain●● Research and ExplorationResearch and Exploration●● Integrating Spatial DataIntegrating Spatial Data●● Examples and SuccessesExamples and Successes
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KenexKenex
Prospectivity in Prospectivity in Mineral ExplorationMineral Exploration
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KenexKenexWhat Defines Prospectivity ?What Defines Prospectivity ?
Coromandel 11 M oz
West Coast 9.5 M oz
Otago 12.3 M oz
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KenexKenex●● World Class DepositWorld Class Deposit●● 5 M oz Au5 M oz Au●● Recent Discovery Recent Discovery
1980s1980s●● 160,000 oz Current 160,000 oz Current
ProductionProduction●● Ten Year Mine LifeTen Year Mine Life
New Mines: Macraes Gold New Mines: Macraes Gold Project, OtagoProject, Otago
All this from a tiny portion of Otago land ~ 5 x 3km during a ten year period
GOLD AND RESOURCEDEVELOPMENTS
MACRAES GOLD PROJECT
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KenexKenexGenetic Models Based on Genetic Models Based on
University ResearchUniversity Research
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KenexKenexExploration ActivityExploration Activity
0
100
200
300
400
500
600
700
1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998
No. o
f app
plic
atio
ns
100
Exploration Permit Applications
200
500
600
84 86 88 90 92 94 96 98
Exploration Expenditure
5
10
15
20
35 Million
© Crown NZ
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KenexKenexLand AccessLand Access
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KenexKenexEnvironmentEnvironment
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KenexKenexSovereign RiskSovereign Risk
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KenexKenexInfrastructureInfrastructure
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KenexKenexDecisions Based On Full Decisions Based On Full Picture Using All FactsPicture Using All Facts
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KenexKenexProspectivity Prospectivity –– Fundamental Fundamental Driver For ExplorationDriver For Exploration●● Investment Criteria No. 1:Investment Criteria No. 1:
-- geological potential and geological informationgeological potential and geological information●● Investment Criteria No. 2:Investment Criteria No. 2:
-- land access, sovereign risk land access, sovereign risk –– value of mineral value of mineral rightsrights
Geologicalpotential
Mineral rights
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KenexKenex
What Is The What Is The Exploration Value Exploration Value
Chain?Chain?
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KenexKenexRegional AssessmentsRegional Assessments
●● Exploration Value Exploration Value Chain.Chain.
●● Critical Ingredients.Critical Ingredients.●● Scale Dependent.Scale Dependent.●● Requirement to Get Requirement to Get
from Regional to from Regional to Prospect Scale Quickly Prospect Scale Quickly and Cheaply.and Cheaply.
20km
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KenexKenexDigital GeologyDigital Geology
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KenexKenexOther DataOther Data
Radiometrics
Satellite
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KenexKenexInterpretation And Exploration Interpretation And Exploration
Models = IdeasModels = Ideas
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KenexKenexProspect Scale ExplorationProspect Scale Exploration
●● Geochemical Data Geochemical Data –– A Numbers GameA Numbers Game
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Kazi
Iron Blow
Cosmo Deeps
Chinese South
Chinese HowleyBig Howley
Western Arm
Rhodes
Yam Ck
Bridge Ck
Fountain Head
Ios
Sikinos
Howley Ridge
Davies
Mt Bonnie
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KenexKenexDetailed GeologyDetailed Geology
●● Prospect Scale Geology Prospect Scale Geology Often Missing.Often Missing.
●● Level of Detail Level of Detail Increasing.Increasing.
●● Prospect Scale to Prospect Scale to Orebody Scale.Orebody Scale.
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KenexKenexDiscoveries DrilledDiscoveries Drilled
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KenexKenexInfill Drilling And Mineralisation Infill Drilling And Mineralisation ContinuityContinuity
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KenexKenexResource DefinitionResource Definition
Resource Resource Estimation And Estimation And Preliminary Pit Preliminary Pit OptimisationOptimisation
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KenexKenexReserve Estimation: Do We Reserve Estimation: Do We
Mine?Mine?
Optimisation, Financial Risk Profile, Reserve Calculations
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KenexKenexData and Information Data and Information --Critical Output From Critical Output From
ExplorationExplorationProspectivity
DISCOVERY
explorer
explorer
information explorer
Years
information explorer
information
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KenexKenexThe Exploration Process Is All The Exploration Process Is All
About ProbabilityAbout Probability
The Practical Implication Of High Discovery Risk For Strategic Planning & Exploration Budgeting Is A Large Difference Between The Average Cost Of Exploration Success And The Level Of Funding Required To Ensure Success (e.g. - “World Class” Deposits)Discoveries Are Typically Made By The 5th-7th Person/Company Covering The Ground
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KenexKenexGeology is Fundamental!!Geology is Fundamental!!
BeforeAfter
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KenexKenexThis is All About the Use of This is All About the Use of Spatial DataSpatial Data
●● Data Were the Competitive AdvantageData Were the Competitive Advantage●● Data Now a Commodity Data Now a Commodity -- Freely AvailableFreely Available●● We Recognise a Problem for Organisations Due to Data We Recognise a Problem for Organisations Due to Data
OverloadOverload●● We Can Synthesise Available Spatial Data to Combine We Can Synthesise Available Spatial Data to Combine
with and Add Value to Your Spatial Datawith and Add Value to Your Spatial Data●● Also Capture and Apply Your Knowledge to Your Data Also Capture and Apply Your Knowledge to Your Data
and Informationand Information
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KenexKenexNeed To Understand Patterns Need To Understand Patterns
And Integrate DataAnd Integrate Data
●● Historic Mines (training data)Historic Mines (training data)●● GeologyGeology●● GeochemistryGeochemistry●● GeophysicsGeophysics●● Simple RecipeSimple Recipe●● Complex MixtureComplex Mixture
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KenexKenexNeed To Be Able to Asses Need To Be Able to Asses
Datasets at International ScalesDatasets at International Scales
5 Million Data Points14 Gb digital data
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KenexKenexMeasure Geological Variable Measure Geological Variable
AssociationsAssociations
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KenexKenexWhat Is Geochemically What Is Geochemically Anomalous?Anomalous?
●● Stream Sediment SamplesStream Sediment Samples●● Rock Chip SamplesRock Chip Samples●● Au, Ag, Cu, Pb, Zn, As Sb and WAu, Ag, Cu, Pb, Zn, As Sb and W●● Defined Anomalies at National scaleDefined Anomalies at National scale●● Defined Sphere of Influence for Defined Sphere of Influence for
Each Sample for Each ElementEach Sample for Each Element●● Created Buffers of Background and Created Buffers of Background and
Anomalous SamplesAnomalous Samples
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KenexKenexTest Our Data Against Our Test Our Data Against Our KnowledgeKnowledge
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KenexKenexIntegrating Data, Information Integrating Data, Information And KnowledgeAnd Knowledge
…… the power of GISthe power of GISGeological Data
Information
Knowledge of Process
Property-ID X-Coord Y-Coord Ground Condition(PDVROL) (PDXCOO) (PDYCOO) (HZCGC)
11111 2953617 6953457 111112 2953634 6953463 211113 2953651 6953469 211114 2953668 6953475 3
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KenexKenex
What Knowledge?What Knowledge?--Genetic Models and Genetic Models and Exploration ModelsExploration Models
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KenexKenexKnown Deposit StudiesKnown Deposit Studies
© IGNS
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KenexKenexGolden CrossGolden Cross
© IGNS
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KenexKenexThe Understanding of ProcessThe Understanding of Process
© IGNS
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KenexKenexPresent Processes To Present Processes To Understand the PastUnderstand the Past
© IGNS
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KenexKenexGenetic ModelGenetic Model
●● Magmatic InputMagmatic Input-- Heat and Heat and Fluid.Fluid.
●● Metal Zonation.Metal Zonation.●● Mixing and Boiling.Mixing and Boiling.●● Sinters and Breccias.Sinters and Breccias.●● Alteration Zonation.Alteration Zonation.●● Fluid Chemistry and Fluid Chemistry and
Physics.Physics.
© IGNS
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KenexKenexThe Exploration ModelThe Exploration Model
●● Must Focus on Similarities.Must Focus on Similarities.●● Data Limited.Data Limited.●● Budget Constrained.Budget Constrained.●● Time Delivery.Time Delivery.●● It’s The Combination of It’s The Combination of
Variables That is Important.Variables That is Important.●● Testing Spatial Associations.Testing Spatial Associations.●● Identifying Useful Features in Identifying Useful Features in
Genetic Models.Genetic Models. © IGNS
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KenexKenexKnowledge Of Process Knowledge Of Process Allows PredictionAllows Prediction
Concept AppliesTo All Users Of Spatial Data
Understanding
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KenexKenex
Integrating Data and Integrating Data and Knowledge Knowledge –– How?How?
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KenexKenexSingle Variable ModelsSingle Variable Models
••Estimating New Points Estimating New Points From Point DataFrom Point Data
••GriddingGridding
••Data InterpolationData Interpolation
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KenexKenex3D Block Modelling3D Block Modelling
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KenexKenexMultiMulti--variable Modelsvariable Models
A weighted aggregation
process
Risk & Cost
Resource Potential
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KenexKenexWeights Of EvidenceWeights Of Evidence●● Hypothesis is This Location is Favourable for Occurrence of Hypothesis is This Location is Favourable for Occurrence of
Gold or Wine: Variables in Layers Weighted and AddedGold or Wine: Variables in Layers Weighted and Added●● Weights Estimated from Measured Associations Weights Estimated from Measured Associations ●● Hypothesis is Repeatedly Evaluated for all Possible Locations Hypothesis is Repeatedly Evaluated for all Possible Locations
on the Map, Producing a Mineral Potential Mapon the Map, Producing a Mineral Potential Map
A weighted aggregation
process
Risk & Cost
Mineralisation Potential
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KenexKenexFuzzy Logic and Neural Fuzzy Logic and Neural NetworksNetworks
A weighted aggregation
processArcView
Risk & Cost
Mineralisation Potential
●● Good for Poorly Explored Areas, Depends on Experts!!!Good for Poorly Explored Areas, Depends on Experts!!!●● Results Variable and Depends on Training DataResults Variable and Depends on Training Data
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KenexKenexWofE Based On ProbabilityWofE Based On Probability
∗∗∗∗
∗∗
∗∗
∗∗
∗∗
∗∗∗∗
∗∗∗∗
100km100km
100km100km
a = 10,000kmA = Unit Cell = 1km2 celln(d) = 10 total depositsP{D} = 0.001n(bd)= dep in arean(bd)= unit cells in area - depn(d) = tot unit cells - tot depn(bd)= dep not in arean(bd)= u cells not in area - dep
Ws+= 1/n(bd)+1/n(bd)Ws-= 1/n(bd)+1/n(bd)Cs~Sqrt Ws+ + Ws-StudC=C/Cs
a = 10,000kmA = Unit Cell = 1km2 celln(d) = 10 total depositsP{D} = 0.001n(bd)= dep in arean(bd)= unit cells in area - depn(d) = tot unit cells - tot depn(bd)= dep not in arean(bd)= u cells not in area - dep
Ws+= 1/n(bd)+1/n(bd)Ws-= 1/n(bd)+1/n(bd)Cs~Sqrt Ws+ + Ws-StudC=C/Cs
W+=Log(n(bd)/n(d)/n(bd)/n(d)W-=Log(n(bd)/n(d)/n(bd)/n(d)C=W+ -W-
W+=Log(n(bd)/n(d)/n(bd)/n(d)W+=Log(n(bd)/n(d)/n(bd)/n(d)WW--=Log(n(bd)/n(d)/n(bd)/n(d)=Log(n(bd)/n(d)/n(bd)/n(d)C=W+ C=W+ --WW--
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KenexKenexSpatial Analysis Spatial Analysis –– Measuring Measuring
Associations With Associations With MineralisationMineralisation
●●Proximity to Major Faults and to Fault OrientationProximity to Major Faults and to Fault Orientation●●Lithology (Basalt, Andesite, Dacite or Rhyolite; Flows Lithology (Basalt, Andesite, Dacite or Rhyolite; Flows Versus Pyroclastic Rocks)Versus Pyroclastic Rocks) and and Age of Host RocksAge of Host Rocks●●Proximity to Domes, Calderas and/or Ring StructuresProximity to Domes, Calderas and/or Ring Structures●●Correlation with Specific Geochemical Elements (Hg, Sb Correlation with Specific Geochemical Elements (Hg, Sb and As +ve; Cu, Pb and Zn and As +ve; Cu, Pb and Zn ––ve).ve).●●New Measures, Fault Roughness, Fractals, AftershocksNew Measures, Fault Roughness, Fractals, Aftershocks
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KenexKenexWhat Is Important?What Is Important?
Variable Correlation ValueArgillic Alteration 5.2Propyllitic Alteration 5.0Silicic Alteration 4.8Structural density of veins 4.7Eruption breccias 4.2Host Rock Type 3.9Clay Alteration 3.9Silica-sulphide Alteration 3.3Hg mineralisation 3.2Stream sediment As 2.9NE and ENE faults 2.7Structural density of faults excluding thrusts 2.6Rock chip Sb 2.2Rock chip Au 2.1Stream sediment Cu 2.1Structural density of all faults 2.0Rock chip As 1.9Stream sediment Au 1.9Rock chip Hg 1.7
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KenexKenex
Taupo Volcanic Taupo Volcanic ZoneZone
NorthlandNorthland
CoromandelCoromandel© IGNS
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KenexKenexWhat You Can Do With What You Can Do With Prospectivity ModelsProspectivity Models
•• Business Business DevelopmentDevelopment
•• Land AccessLand Access
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KenexKenexExploration LogisticsExploration Logistics
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KenexKenexProject FundingProject Funding
●● Raising CapitalRaising Capital●● Marketing to Project FundersMarketing to Project Funders●● Highlighting ProspectivityHighlighting Prospectivity●● Convincing Non GeologistsConvincing Non Geologists●● Simplifying Complex Concepts of an Exploration Simplifying Complex Concepts of an Exploration
ModelModel●● Cost Reduction and Risk MinimisationCost Reduction and Risk Minimisation
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KenexKenexAurora Minerals Floated Aurora Minerals Floated
2004 Raised A$4.0M2004 Raised A$4.0M●● Northland NZNorthland NZ●● Newly Newly
Discovered Discovered Gold Gold ProvinceProvince
●● Based on Based on WoE ModelWoE Model
●● First Area First Area Checked Checked SuccessfulSuccessful
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KenexKenexExploration Work PlanningExploration Work Planning
●● Key Data and Exploration ModelKey Data and Exploration Model●● Which Data Contribute to The Model?Which Data Contribute to The Model?●● Identify Areas of Missing DataIdentify Areas of Missing Data●● Highlight Data that Will Add ValueHighlight Data that Will Add Value●● Prioritise ExplorationPrioritise Exploration●● We Lack ProspectWe Lack Prospect--scale Geological Mappingscale Geological Mapping
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KenexKenexExploration ManagementExploration Management
●● How Effective is Your Exploration?How Effective is Your Exploration?●● Has Your Data Added to the Prospectivity of Your Has Your Data Added to the Prospectivity of Your
Target?Target?●● Is your Exploration Model Working?Is your Exploration Model Working?●● ReRe--prioritise Exploration Targetsprioritise Exploration Targets●● Cost Reduction and Risk MinimisationCost Reduction and Risk Minimisation
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KenexKenexRanked DifferencesRanked Differences
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KenexKenexTest New Research ConceptsTest New Research Concepts
●● Test Research ConceptsTest Research Concepts●● Add Value to Historic Data and KnowledgeAdd Value to Historic Data and Knowledge●● Apply New Exploration Models to Old DataApply New Exploration Models to Old Data●● Make NationalMake National--scale Comparisonsscale Comparisons●● Make International Scale ComparisonsMake International Scale Comparisons
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KenexKenexAuzex ResourcesAuzex Resources
Exploring for Metals in GraniteExploring for Metals in Granite
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KenexKenexGranite Gold MineralisationGranite Gold Mineralisation
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KenexKenexData And InformationData And Information• Integrated and assessed• 79,000 mineral occurrences.• 9,324,000 rock data.• 21,912,000 SS data.• 26,360,592 soil data. • 109,000 drill holes. • 2,537,522 km2 of geological data.
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KenexKenexInternational Scale Model International Scale Model ––
Search Area ReducedSearch Area Reduced
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KenexKenexPortfolio ApproachPortfolio Approach
Mineral Extraction
Development
Drill Assessment
Drill Targets
Prospects
Projects3 Projects NQ, NE and West Coast,
containing 51prospective areas
38 Au, Mo-Bi-Ag-Au, Sn-W
12 Au, Mo-Bi-Ag-Au, Sn-W
6 Au, Mo-Bi-Ag-Au, Sn-W
Increasing Value
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KenexKenexProbability And Risk ReductionProbability And Risk Reduction
The Practical Implication Of High Discovery Risk For Strategic Planning & Exploration Budgeting Is A Large Difference Between The Average Cost Of Exploration Success And The Level Of Funding Required To Ensure Success (e.g. - “World Class” Deposits)Discoveries Are Typically Made By The 5th-7th Person/Company Covering The Ground
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KenexKenexFinding New Deposits Is Finding New Deposits Is Hard! But:Hard! But:
●● Exploration is a Business.Exploration is a Business.●● Geological Data are Key Geological Data are Key
PredictorsPredictors●● Opportunities Still Exist in Near Opportunities Still Exist in Near
SurfaceSurface●● Data and Knowledge Must be Data and Knowledge Must be
Integrated.Integrated.●● New Tools AvailableNew Tools Available●● It WorksIt Works