Classification and Key Characteristics of VMS Deposits

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Sources of Information• Studies of Ancient Deposits– Precambrian Shield– Kuroko (Japan)– Paleozoic in Canada and Australia– Lower Cretaceous in Peru and Mexico– Mesozoic-Cenozoic in Cyprus, Oman• Modern Hydrothermal Systems on theSeafloor– Spreading ridges– Back-Arcs and Arcs
The Challenge: Some Belts are Rich• Exceptional valuein specific tectonicareas of highpotential shouldlead to explorationinvestment inthese areas• Why are somebelts so wellendowed (Abitibi,Trans-Hudson,Slave) and othersnot (Wabigoon,Grenville) ??and Others Aren’t… Why?
Page 2 and 3: Contributors (Alphabetical)• D. A
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 22 and 23: Bimodal mafic: Comparison of Subtyp
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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