Open-File Report 2009-1235
Volcanogenic massive sulfide (VMS) deposits are very significant current and historical resources of Cu-Pb-Zn-Au-Ag, are active exploration targets in several areas of the United States and potentially have significant environmental effects. This new USGS VMS deposit model provides a comprehensive review of deposit occurrence and ore genesis, and fully integrates recent advances in the understanding of active seafloor VMS-forming environments, and integrates consideration of geoenvironmental consequences of mining VMS deposits.
Because VMS deposits exhibit a broad range of geological and geochemical characteristics, a suitable classification system is required to incorporate these variations into the mineral deposit model. We classify VMS deposits based on compositional variations in volcanic and sedimentary host rocks. The advantage of the classification method is that it provides a closer linkage between tectonic setting and lithostratigraphic assemblages, and an increased predictive capability during field-based studies.
First posted October 9, 2009
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Shanks, W.C.P., III, Dusel-Bacon, Cynthia, Koski, Randolph, Morgan, L.A., Mosier, Dan, Piatak, N.M., Ridley, Ian, Seal, R.R., II, Schulz, K.J., Slack, J.F., Thurston, Roland, 2009, A new occurrence model for national assessment of undiscovered volcanogenic massive sulfide deposits: U.S. Geological Survey Open-File Report 2009–1235, 27 p.
Deposit Type and Associated Commodities
Physical Description of Deposits
Geophysical Characteristics of VMS Deposits
Supergene Ore and Gangue Characteristics
Petrology of Igneous Rocks Associated with VMS Deposits
Petrology of Sedimentary Rocks Associated with VMS Deposits
Effects of Metamorphism and Deformation on VMS Host Rocks and Deposits
Theory of Deposit Formation
Exploration and Resource Assessment Guides