Economic Geology, 2001, V 96, N 3, May-June.

The Role of Carbonaceous "Indicator" Slates in the Genesis of Lode Gold
Mineralization in the Western Lachlan Orogen, Southeastern Australia
Frank P. Bierlein, Ian Cartwright, and Stafford McKnight
431

New Evidence for Multiple Periods of Gold Emplacement in the Porcupine
Mining District, Timmins Area, Ontario, Canada
Matthew D. Gray and Richard W. Hutchinson
453

Stratigraphic and Structural Setting of the Hemlo Gold Deposit, Ontario,
Canada 
Shoufa Lin
477

Postmineralization Faults in the Beaufor Golf Deposit, Abitibi Greenstone
Belt, Canada: Geometry, Origin, and Tectonic Implications for the Val d'Or
Mining District
Alain Tremblay
509

Redistribution of Gold within Arsenopyrite and Löllingite during Pro-and
Retrograde Metamorphism: Application to Timing of Mineralization
Andrew G. Tomkins and John A. Mavrogenes
525

Paragenesis, Elemental Distribution and Stable Isotopes at the Peña
Colorada Iron Skarn, Colima, Mexico            
Lukas Zurcher, Joaquín Ruiz, and Mark D. Barton
535

Controls on the Formation of Contact-Type Platinum-Group Element
Mineralization in the East Bull Lake Intrusion    
David C. Peck, Reid R. Keays, Richard S. James, Peter T. Chubb, and Shane Reeves
559

The Source of Metals in the Qilinchang Zn-Pb Deposit, Northeastern Yunnan,
China: Pb-Sr Isotope Constraints        
Chaoxian Zhou, Chunsheng Wei, Jiyun Guo, and Chaoyang Li
583

Marine Chemistry of the Permian Phosphoria Formation and Basin, Southeast Idaho
David Z. Piper
599

Paleomagnetic Constraints on Ages of Mineralization in the Kalahari
Manganese Field, South Africa 
D.A.D. Evans, J. Gutzmer, N. J. Beukes, and J. L. Kirschvink
621

Scientific Communications

The Giant Muruntau Gold Deposit; Geologic, Geochronologic, and Fluid
Inclusion Constraints on Ore Genesis        
A. R. Wilde, P. Layer, T. Mernagh, and J. Foster
633

Extreme Fractionation of Platinum Group Elements in Volcanogenic Massive
Sulfide Deposits
Yuanming Pan and Qianli Xie
645

The Role of Magma Mixing in the Genesis of PGE Mineralization in the
Bushveld Complex: Thermodynamic Calculations and New Interpretations
Chusi Li, Wolfgang D. Maier, and Sybrand A de Waal
653

Discussions:

Dike Hosted Ores ot the Beast Deposit and the Importance of Eocene
Magmatism in Gold Mineralization of the Carlin Trend, Nevada - A Discussion
G. D. Langstaff
663

Dike Hosted Ores ot the Beast Deposit and the Importance of Eocene
Magmatism in Gold Mineralization of the Carlin Trend, Nevada - A Reply
Michael W. Ressel, Donald C. Noble, Christopher D. Henry, and Wayne S. Trudel
666