Final Report - Geoscience BC
Final Report - Geoscience BC Final Report - Geoscience BC
Consider alteration - may explain the various susceptibility populations observed in each rocktype/sub rock-typeUnaltered vs altered andesites250Unaltered0120Potassic alteration03000Propylitic alteration3000Propylliticoverprintingpotassic alteration20Carbonate alteration00.001 0.01 0.1 1 10 100 1000Magnetic Susceptibility x 10 -3 SI UnitsFigure 7. Unaltered vs altered andesites17
4 1 9 . 7 12 55 07 51 0 01 2 51 5 01 7 52 0 02 2 52 5 02 7 53 0 03 2 53 5 03 7 54 0 00R O C KA L T N0M A G S U S2 6 60 5m g0cp20 2 0p y02 55 07 51 0 01 2 51 5 01 7 52 0 02 2 52 5 02 7 53 0 03 2 53 5 03 7 54 0 04 1 9 . 7 1Trends in magnetic susceptibility at MilliganMonzonite Hybrid AndesiteAndesite0m420mLow magnetiteabundance, lowsusceptibility, ingenerally unalteredandesitic rocks.Increased pyrite withcarbonate/epidotealteration.Potassic alterationPropylitic alterationCarbonate alterationPropylitic overprintingpotassic alterationCarbonate overprintingpotassic alterationPotassic alteration in andesite yields magnetite.Overprinting by other alteration assemblagescauses irregular susceptibilityWhere unaltered – a drop in susceptibilityWhere potassic alteration occurs in monzonite,K-spar/biotite forms preferentially (less Fe formagnetite) thus slightly lower susceptibilities?GeolAltnMagSusMagCpyPyFigure 8. Trends in magnetic susceptibility at Mt. Milligan18
- Page 3 and 4: … modelling the earth310 Victoria
- Page 5 and 6: … modelling the earthList of Figu
- Page 7 and 8: 1. IntroductionPhysical rock proper
- Page 9 and 10: 2. Project DeliverablesDeliverables
- Page 11 and 12: GSC in the Fraser Delta region (dat
- Page 13 and 14: (c)Data Summary by LocationArea of
- Page 15: directories: ‘Input Data’, ‘O
- Page 18 and 19: 4. RPDS Application4.1. General Ove
- Page 20 and 21: Wireline DataRPDSSample DataProcess
- Page 22 and 23: 4.3. Web InterfaceAll data within R
- Page 25 and 26: Appendix 1 - Rock Properties Worksh
- Page 27 and 28: Appendix 2 - DVD Data ArchiveSee at
- Page 29 and 30: … modelling the earthTable of Con
- Page 31 and 32: … modelling the earth
- Page 33 and 34: geophysical data. The geophysical m
- Page 35 and 36: 3. Physical PropertiesProperty Meth
- Page 37 and 38: surveys have excellent resolution o
- Page 39 and 40: surveys are commonly calibrated by
- Page 41 and 42: 5. Case Study of Mt. Milligan Porph
- Page 43 and 44: merge into the background. Deposits
- Page 45 and 46: Mount Milligan geologyFrom Jago (20
- Page 47: Susceptibilty data for rock types m
- Page 51 and 52: Mount Milligan synthetic models for
- Page 53 and 54: Unconstrained synthetic model inver
- Page 55 and 56: Detection of other targets - lower
- Page 57 and 58: Detection of other targets - buried
- Page 59 and 60: Mt. Milligan - unconstrained invers
- Page 61 and 62: Constrained Inversion:Unconstrained
- Page 63 and 64: Constrained Inversion:Unconstrained
- Page 65 and 66: Constrained Inversion:Unconstrained
Consider alteration - may explain the various susceptibility populations observed in each rocktype/sub rock-typeUnaltered vs altered andesites250Unaltered0120Potassic alteration03000Propylitic alteration3000Propylliticoverprintingpotassic alteration20Carbonate alteration00.001 0.01 0.1 1 10 100 1000Magnetic Susceptibility x 10 -3 SI UnitsFigure 7. Unaltered vs altered andesites17
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