Giant porphyry-related metal camps of the world

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Description Database of large-tonnage, generally low-grade, hydrothermal deposits related to igneous intrusions emplaced at high crustal levels. Includes tri-partite classification based on deposit type, metal commodities, and source/host pluton chemistry.
Originators Mutschler, Felix E., Ludington, Stephen D., Bookstrom, Arthur A.
Publication U.S. Geological Survey Open-File Report 99-556

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