ECONOMIC GEOLOGY and the Bulletin of the Society of Economic Geologists, 2004, V 99, N 1, Jan-Feb.

Henderson Porphyry Molybdenum System, Colorado: I. Sequence 
and Abundance of Hydrothermal Mineral Assemblages,
Flow Paths of Evolving Fluids, and Evolutionary Style
Eric Seedorff and Marco T. Einaudi

Henderson Porphyry Molybdenum System, Colorado:
II. Decoupling of Introduction and Deposition of Metals During 
Geochemical Evolution of Hydrothermal Fluids
Eric Seedorff and Marco T. Einaudi

Carboniferous Orogenic Gold Deposits at Pataz, Eastern Andean
Cordillera, Peru: Geological and Structural Framework, Paragenesis,
Alteration, and 40Ar/39Ar Geochronology
Yves Haeberlin, Robert Moritz, Lluis Fontbote, and Michael Cosca

Significance of Alteration Assemblages for the Origin and Evolution
of the Proterozoic Nabarlek Unconformity-Related Uranium Deposit,
Northern Territory, Australia
Paul A. Polito, T. Kurt Kyser, Jim Marlatt, Paul Alexandre,
Zia Bajwah, and Garth Drever

The Onaman Prospect, Ontario: An Unusual Occurrence of Cu-Bearing
Au Mineralization in a Shear Zone
Olivier Grondin and Anthony E. Williams-Jones

Using the High Mobility of Palladium in the Surface Media in Exploration
for Platinum-Group Element Deposits: Evidence from the Lac des
Iles Region, Northwestern Ontario
Keiko H. Hattori and Eion M. Cameron

Scientific Communications

Replacements of Base Metal Sulfides by Actionolite, Epidote, Calcite, and Magnetite in the UG2 and Merensky Reef of the Bushveld Complex, South Africa Chusi Li, Edward M. Ripley, Enrique Merino, and Wolfgang D. Maier Limits on the Metal Content of Fluid Inclusions in Gangue Minerals from the Viburnum Trend, Southeast Missouri Determined by Laser Ablation ICP-MS Martin S. Appold, Tye J. Numelin, Thomas J. Shepherd, and Simon R. Chenery