have a look at some of my research items in my profile. there should be lots to get you started. also see: 1)
Galley, A. G., Hannington, M., and Jonasson, I., 2007, Volcanogenic massive sulphide deposits, in Goodfellow, W. D., ed., Mineral Deposits of Canada: A Synthesis of Major Deposit-types, District Metallogeny, the Evolution of Geological Provinces, and Exploration Methods, Special Publication 5, Mineral Deposits Division, Geological Association of Canada, p. 141-161. 2)
Franklin, J. M., Gibson, H. L., Jonasson, I. R., and Galley, A. G., 2005, Volcanogenic massive sulfide deposits, in Hedenquist, J. W., Thompson, J. F. H., Goldfarb, R. J., and Richards, J. P., eds., Economic Geology One Hundredth Anniversary Volume: Littleton, Colorado, Society of Economic Geologists, Inc, p. 523-560. 3)
Hannington, M. D., 2014, Volcanogenic Massive Sulfide Deposits, in Holland, H., and Turekian, K., eds., Treatise on Geochemistry (Second Edition), 13, Elsevier, p. 463-488. 4)
Shanks, W. C., and Thurston, R., 2012, Volcanogenic massive sulfide occurrence model, U.S. Geological Survey Scientific Investigations Report, 2010-5070-C, p. 345p.