Classification and Key Characteristics of VMS Deposits

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Bimodal mafic: Comparison of SubtypesFlow dominated• Higher Cu, noPb• Lower totalmetal content
Type 1A:Bimodal mafic-dominated (flow)• Setting: Ocean-ocean arc, nascent (early) arc rifting– Median Size and Composition: 2.8m.t., 1.41 Cu, 2.6 Zn,0.1Pb, 0.8 g/t Au, 22 g/t Ag– Geology: >75% pillowed tholeiitic basalt-andesite,
Page 2 and 3: Contributors (Alphabetical)• D. A
Page 4 and 5: Sources of Information• Studies o
Page 6 and 7: VMS Model• What are the key geolo
Page 8 and 9: HydrothermalEscapePrecipitationSite
Page 11 and 12: Five VMS Lithotectonic Settings•1
Page 13: 2: VMS Deposits: Zinc-Lead-Rich Dep
Page 16 and 17: Excellent Oceanic BackarcPotential
Page 18 and 19: Median Metal Content (Millions of T
Page 20 and 21: Metal Correlation MatrixCu Pb Zn Au
Page 24 and 25: Noranda Cross Section
Page 26 and 27: • Snow Lake- two major VMSepisode
Page 28 and 29: Typical Noranda-type Deposit•Sulf
Page 30 and 31: Sturgeon Lake District: Example of
Page 32 and 33: Sturgeon LakeBimodal mafic 1BPyrocl
Page 34 and 35: Type 2: Mafic-Backarc (ophiolite)
Page 36: Type 3: Pelitic - Mafic Backarc (Be
Page 39: Type 4: Bimodal felsic-dominated•
Page 43 and 44: Type 5: Felsic siliciclastic hosted
Page 46 and 47: Geologyof theBrunswickDistrict
Page 48: Summary• Cu-rich deposits form in

Classification and Key Characteristics of VMS Deposits

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