Ni-Cu-PGE Deposits in North America - ADIMB

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Mechanisms of sulfide deposition • Separation of immiscible sulfide liquid droplets • Collection of base and precious chalcophile elements by sulfide • Rain of sulfide droplets into cumulates to produce disseminated, net, and massive sulfide at the base of the liquid zone • Conduits allow for a large amount of magma to be processed allowing for mass balance problems to be circumvented • Structural traps like depressions, widenings of conduits
Chromite precipitation • Magma mixing • Assimilation • Melt-crystalfluid reactions • Complex variations on these
Page 1 and 2: Metallogeny of Chromite, Ni, Cu and
Page 3 and 4: Source - transport - trap • Large
Page 5: Plume magmas
Page 9 and 10: Conduits as chemical reactors • i
Page 11 and 12: Physical environments
Page 13 and 14: Eagle Eagle’s Nest After Naldrett
Page 16 and 17: Eagle’s Nest up • Massive sulfi
Page 18 and 19: Circum-Superior Raglan deposits
Page 20 and 21: Raglan horizon Lesher et al, 2007
Page 22 and 23: Thompson Ni Belt Stratigraphic Colu
Page 24: Sudbury Structure Figure 1 B A Muns
Page 27 and 28: Strathcona Frood-Stobie Falconbridg
Page 29 and 30: Voisey’s Bay After Kerr and Ryan
Page 31 and 32: Ni-Cu-PGE Deposits in North America
Page 34 and 35: Mid-Continent Rift - Eagle Deposit
Page 36 and 37: Chromite occurences in North Americ
Page 38 and 39: Double Eagle Complex - 2735 Ma 38 3
Page 40 and 41: NOT 08 1G31 70 m chromitite interse
Page 42 and 43: Bird River belt • 2745 Ma • 3.6
Page 44 and 45: Stillwater Complex 2705 Ma Zeintek,
Page 46: Conclusions • Known giant deposit

Ni-Cu-PGE Deposits in North America - ADIMB

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