ECONOMIC GEOLOGY and the Bulletin of the Society of Economic Geologists, 2004, V 88, N 6, September-October.

The Hemlo Gold Deposit, Ontario: An Example of Melting
and Mobilization of a Precious Metal-Sulfosalt 
Assemblage during Amphibolite Facies 
Metamorphism and Deformation
Andrew G. Tomkins, David R. M. Pattison, 
and Eva Zaleski

Metal Sources in Mineral Deposits and Crustal Rocks
of Ecuador (1N-4S): A Lead Isotope Synthesis
Massimo Chiaradia, Lluis Fontbote, 
and Agustin Paladines

The Rossignol Fluorite Vein, Chaillac, France: 
Multiphase Hydrothermal Activity and
Intravein Sedimentation 
Stanislas Sizaret, Eric Marcoux, 
Michel Jebrak, and Jean-Claude Touray

Timing and Duration of High-Temperature
Gold Mineralization and Spatially Associated
Granitoid Magmatism at Chalice, 
Yilgarn Craton, Western Australia
Louis A. Bucci, Neal J. McNaughton,
Ian R. Fletcher, David I. Groves, 
Natalie Kositcin, Holly J. Stein, 
and Steffan G. Hagemann

Modeling the Role of Sodic Alteration in
the Genesis of Iron Oxide-Copper-Gold
Deposits, Eastern Mount Isa Block, Australia
Nicholas H. S. Oliver, James S. Cleverley, 
Geordie Mark, Peter J. Pollard, Bin Fu, Lucas
J. Marshall, Michael J. Rubenach, 
Patrick J. Williams, and Timothy Baker

The Kwyjibo Cu-Rare Earth Element-U-Au-Mo-F 
Property, Quebec: A Mesoproterozoic 
Polymetallic Iron Oxide Deposit in the
Northeastern Grenville Province
Michel Gauthier, Francis Chartrand, 
Alain Cayer, and Jean David

The Mineralogy and Geochemistry of the
Cerro Matoso S.A. Ni-Laterite Deposit,
Montelibano, Colombia
S. A. Gleeson, R. J. Herrington,
J. Durango, C. A. Velasquez, and G. Koll

Scientific Communications

Re-Os and 40Ar/39Ar Ages of Porphyry Molybdenum Deposits in the East Greenland Volcanic Rifted Margin C. Kent Brooks, Christian Tegner, Holly Stein, and Bjorn Thomassen Sulfur and Lead Isotope Study of the El Mochito Zn-Pb-Ag Deposit K. M. Ault and A. E. Williams-Jones Geochemistry and Mineralogy of Neoproterozoic Banded Iron Formations and Some Selected, Siliceous Manganese-Formations from the Urucum District, Mato Grosso do Sul, Brazil Cornelis Klein and Eduardo A. Ladeira