David A. Johnson
University of Arizona, Tucson, AZ
Activity
2005
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IMPLICATIONS OF NEW U-PB DATES FROM PORPHYRY COPPER-RELATED PLUTONS IN THE SUPERIOR-GLOBE-RAY-CHRISTMAS AREA, ARIZONA
T65 Sources of Porphyry Copper Deposits: Magmas, Metals, and Fluids IMonday, 17 October 20058:00 AM - 12:00 PM
2003
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ABUNDANCE AND BEHAVIOR OF ORE AND OTHER METALS IN LATEST CRETACEOUS TO EARLY TERTIARY ("LARAMIDE") METALUMINOUS AND PERALUMINOUS GRANITOIDS, SOUTH-CENTRAL ARIZONA AND NORTH-CENTRAL SONORA
114 Economic Geology (Posters) I: PGE, Magmatic, and Porphyry DepositsMonday, 3 November 20031:30 PM - 5:30 PM
2001
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BASALT-RELATED FE-OXIDE(±CU-AG-CO-AU) SYSTEMS: THE HUMBOLDT MAFIC COMPLEX EXAMPLE, WESTERN US
2 SEG Special Session II: Iron-Oxide(-Copper-Gold) Systems—Deposit Studies to Global ContextSunday, 4 November 20011:30 PM - 5:30 PM
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SODIC ALTERATION AND FE-OXIDE-RICH HYDROTHERMAL SYSTEMS
2 SEG Special Session II: Iron-Oxide(-Copper-Gold) Systems—Deposit Studies to Global ContextSunday, 4 November 20011:30 PM - 5:30 PM
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FE-OXIDE-CU (AU) DEPOSITS OF THE YERINGTON DISTRICT, NEVADA: LINKS TO DISTRICT-SCALE SODIC-CALCIC ALTERATION AND PORPHYRY CU DEPOSITS
2 SEG Special Session II: Iron-Oxide(-Copper-Gold) Systems—Deposit Studies to Global ContextSunday, 4 November 20011:30 PM - 5:30 PM