Grade and tonnage models are useful in quantitative mineral-resource assessments. The models and database presented in this report are an update of earlier publications about volcanogenic massive sulfide (VMS) deposits (Mosier, Singer, and Salem, 1983; Cox, 1986; Singer, 1986a-c; Singer and Mosier, 1986a, b). These VMS deposits include what were formerly classified as kuroko, Cyprus, and Besshi deposits.

Volcanogenic massive sulide (VMS) deposits, also known as volcanic-hosted massive sulide, volcanic-associated massive sulide, or sealoor massive sulide deposits, are important sources of copper, zinc, lead, gold, and silver (Cu, Zn, Pb, Au, and Ag). These deposits form at or near the sealoor where circulating hydrothermal luids driven by magmatic heat are quenched through mixing with bottom waters or porewaters in near-sealoor lithologies. Massive sulide lenses vary widely in shape and size and may be podlike or sheetlike. They are generally stratiform and may occur as multiple lenses.

The Antarctic Research Series: Statement of Objectives Board of Associate Editors 

The Velocity Structure of Mount Erebus, Antarctica, and Its Lava Lake R. R. Dibble, B. O'Brien, and C. A. Rowe

Velocity Modeling in the Erupting Magma Column of Mount Erebus, Antarctica R. R. Dibble

The Seismic Activity of Mount Erebus in 1981-1990 Katsutada Kaminuma

Monitoring Mount Erebus by Satellite Remote Sensing D. A. Rothery and C. Oppenheimer