November 1999

Volume 51 Issue 11

FEATURED ARTICLES

Technology and productivity changes in US coal mining: a 45-year review Joel Darmstadter	Preview
New discoveries at the Red Dog zinc-lead deposit S. Jennings, L.E. Young, J.T. Plahuta, T.E. Korlak, G.A. Coulter	Preview
Gold and silver exploration in Irian Jaya D. Potter, K. Parris, J. Mac Pherson, D. Wadsworth, G. O'Connor, Wahyu Sunyoto, Sugeng Widodo, C. Jones, D. MacKenzie, A. Edwards	Preview
Mining Foundation of the Southwest selects 1999 honorees	Preview

Mine closure: a conceptual review H.M. Lima, P. Wathern	Abstract
Dense-sludge process for reduced AMD sludge disposal R.L. Zick, M.H. Leon, D.C. Finn	Abstract
Sorption of uranium, strontium and cesium on pozzolan U. Cetin, R.K. Mehta	Abstract