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Magnetics – different features at different scales NRCan magnetics 50 m line spacing Survey 1.2 x 1 km 800 m line spacing This map: ~20 km x 15 km Geotech Ltd. 2008, airborne magnetics, for G<strong>BC</strong> 200 m line spacing Survey 2.6 x 2.6 km Southern Star
Physical property variations related to alteration zoning Potassic Potassic From Jago (2008) K-alt’d basalt K-alt’d basalt K-alt’d basalt Bas. Na-alt’d basalt Prop (Chl+Ep+Cb) basalt Na-alt’d basalt Prop o/p K basalt Prop o/p K basalt Na-alt’d basalt K–alt’d monzonite Prop (Chl+Ep+Cb) basalt Prop (Chl+Ep+Cb) basalt Monz. Na–alt’d monzonite K–alt’d monzonite K–alt’d monzonite Magnetic Susceptibility Na–alt’d monzonite Density Na–alt’d monzonite Resistivity
Page 1 and 2: Mount Milligan BC porphyry deposits
Page 3 and 4: Relating geology to geophysics thro
Page 5 and 6: Thinking geology while interrogatin
Page 7: Mount Milligan local geology Mount
Page 11 and 12: Lorraine Lorraine Mount Milligan Mo
Page 13 and 14: Lorraine magnetics and chargeabilit
Page 15 and 16: Chargeability and resistivity NW Lo
Page 17 and 18: Mount Polley local geology and alte
Page 19 and 20: Local high mag zones
Page 21 and 22: Lorraine Mount Milligan Mouse Mount
Page 23 and 24: Local scale magnetics and chargeabi
Page 25 and 26: Susceptibility not related directly
Page 27 and 28: Lorraine Mount Milligan Gibraltar M
Page 29 and 30: Induced polarization response (rela
Page 31 and 32: IP/Resistivity in non-mineralized v
Page 33: Summary • For alkalic porphyries,

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