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It also presents new grade and tonnage models for three subtypes of porphyry copper deposits, maps showing locations and general ages of these deposits, and a preliminary analysis with a number of figures summarizing many of the properties of these porphyry-style deposits.
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geopubs.wr.usgs.gov/open-file/of02-268/
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The major products from porphyry copper deposits are copper and molybdenum or copper and gold. ... Porphyry copper deposits comprise three broad types: plutonic, volcanic, and those we will call "classic". The general characteristics of each are illustrated in photographs linked near the bottom of this page.
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earthsci.org/mineral/mindep/depfile/por_dep.htm
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Studies of porphyry copper deposits, their regional geologic and geochemical context, and economic and production history will have a significant positive impact on land-use planning, mineral development, and environmental issues.
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minerals.usgs.gov/west/projects/porphcu.htm
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Back to the first slide ... View text version...
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www.public.asu.edu/~jpbirk/eis_cu/sld003.htm
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Jon Spencer, Senior Geologist with AZGS, gave a tour de force presentation at the monthly meeting of the Arizona Geological Society here in Tucson last night, offering a tectonic reconstruction of Southern Arizona through the late Cenozoic, to propose a model for the origin of the regions huge porphyry copper deposits.
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arizonageology.blogspot.com/2009/07/reconstructing-ariz...
arizonageology.blogspot.com/2009/07/reconstructing-arizonas-porphyry-copper.html
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Porphyry copper deposits - Grades, sulfides, alteration ... Gaps in understanding of individual porphyry copper deposits result from limited exposures of the tops, sides, and bottoms of ore zones. In order to build models of porphyry systems, investigators have relied on observations from numerous localities that are...
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pangea.stanford.edu/research/ODEX/marco-yerington.html
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This paper summarizes our current understanding of the formation of porphyrystyle Cu ± Au ± Mo deposits, ... An integrated study of the evolution of the calcalkaline Farallón Negro Volcanic Complex hosting the Bajo de la Alumbrera porphyry Cu-Au deposit (Argentina), and supplementary fluid-chemical data from Bingham...
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sp.lyellcollection.org/cgi/content/abstract/248/1/247
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This report is an update of an earlier publication about porphyry copper deposits. In this report we have added 84 new porphyry copper deposits and removed 12 deposits. In addition, some errors have been corrected and a number of deposits have had some information, such as grades, tonnages, locations, or ages revised.
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pubs.usgs.gov/of/2005/1060/
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The three-part form of assessment includes: (1) delineation of tracts of land where the geology is permissive for porphyry copper deposits to form; (2) selection of grade and tonnage models appropriate for estimating grades and tonnages of the undiscovered porphyry copper deposits in each tract;
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pubs.usgs.gov/of/2008/1253/
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