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Hypogene Alteration And Mineralization In The Dos Pobres Porphyry Cu Au Mo Deposit Safford District Arizona
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Book Synopsis Hypogene Alteration and Mineralization in the Dos Pobres Porphyry Cu(-Au-Mo) Deposit, Safford District, Arizona by : Daniel Russin
Download or read book Hypogene Alteration and Mineralization in the Dos Pobres Porphyry Cu(-Au-Mo) Deposit, Safford District, Arizona written by Daniel Russin and published by . This book was released on 2008 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dos Pobres is unusual among Arizona porphyry deposits in that it is relatively gold- and bornite-rich, and magnetite-bearing and is intimately associated with relatively mafic (quartz monzodiorite-low silica granodiorite) porphyry dikes. Conversely, it has considerably less pyrite and acid alteration than most other Arizona porphyry deposits. These features are like those in many other Au-rich porphyry systems, and they have also stimulated comparisons with andesite-hosted iron-oxide (-Cu-Au) (IOCG) systems such as Candelaria.
Book Synopsis Distribution and Styles of Hypogene Alteration and Mineralization in the Miami-inspiration Porphyry Cu-Mo Deposit, Globe-Miami District, Arizona by : Nathan T. Swaim
Download or read book Distribution and Styles of Hypogene Alteration and Mineralization in the Miami-inspiration Porphyry Cu-Mo Deposit, Globe-Miami District, Arizona written by Nathan T. Swaim and published by . This book was released on 2020 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Miami-Inspiration porphyry Cu-Mo deposit is associated with a Late Cretaceous/Early Paleocene pluton in the southwestern North American porphyry Cu province. Hypogene Cu and Mo mineralization in the Miami-Inspiration deposit is related to porphyritic intrusions of the Schultze Granite (67-61 Ma) and is manifested as vein- and veinlet-hosted and disseminated sulfides in the Schultze Granite and the ~1.7 Ga Pinal Schist. The deposit has been rotated and extended by several generations of mid-Tertiary normal faults which have tilted originally shallower forms of alteration toward the northeast while deeper forms are exposed in the southwest portions of the deposit. Map patterns show that pervasive sulfide-poor potassic alteration (K-feldspar-quartz-biotite ± pyrite) in the southwest and center of the deposit is in contact with sulfide-bearing potassic (K-feldspar-quartz-biotite-chalcopyrite-pyrite) and transitional potassic-sericitic alteration (stable K-feldspar-sericite-chalcopyrite-pyrite) to the north and northeast. Early dark micaceous veins are present in strongly localized pockets in barren potassic alteration, and gray-green sericite veins are present in the sulfide-bearing potassic zone. Sericitic alteration (quartz-sericite-pyrite) postdates and overprints potassic and transitional potassic-sericitic alteration, as sericite pervasively replaces hydrothermal K-feldspar. Propylitic alteration (chlorite-magnetite-epidote-actinolite-calcite) is observed in the northeastern portions of the deposit, while coarse muscovite (“greisen”) alteration (muscovite-quartz-K-feldspar ± pyrite ± chalcopyrite) overprints potassic and barren potassic alteration and mineralization in the southwestern parts of the system. Copper mineralization (chalcopyrite and minor bornite) is mostly concentrated in the sulfide-bearing potassic, transitional potassic-sericitic, and sericitic alteration zones. Vein-hosted molybdenum mineralization in quartz + molybdenite veins and veinlets is common where potassic alteration is overprinted by sericitic alteration. These interpreted alteration and mineralization patterns are similar to other quartz monzodioritic-granitic porphyry Cu-Mo systems in the Globe-Miami district and the southwestern porphyry province.
Book Synopsis Geology, Geochemistry, Alteration, and Mass Transfer in the Sol Prospect, a Sub-economic Porphyry Copper-molybdenum Deposit, Safford District, Graham County, Arizona by : William Vernon Yarter
Download or read book Geology, Geochemistry, Alteration, and Mass Transfer in the Sol Prospect, a Sub-economic Porphyry Copper-molybdenum Deposit, Safford District, Graham County, Arizona written by William Vernon Yarter and published by . This book was released on 1981 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fluid-inclusion Petrology by : John Thomas Nash
Download or read book Fluid-inclusion Petrology written by John Thomas Nash and published by . This book was released on 1976 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary of new and published descriptions of fluid inclusions from 36 porphyry copper deposits and discussion of possible applications to exploration for copper deposits.
Book Synopsis Geology and Geochemistry of Porphyry-related, Carbonate-hosted, Massive Replacement Cu-Au Deposits by : Kurt Charles Friehauf
Download or read book Geology and Geochemistry of Porphyry-related, Carbonate-hosted, Massive Replacement Cu-Au Deposits written by Kurt Charles Friehauf and published by . This book was released on 1998 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Petrology, Alteration and Mineralization of the Poorman Creek-Silver Bell Stock Porphyry Cu-Mo Deposit by : James M. McKee
Download or read book Petrology, Alteration and Mineralization of the Poorman Creek-Silver Bell Stock Porphyry Cu-Mo Deposit written by James M. McKee and published by . This book was released on 1978 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Southwest Zone Breccia-centered Silica-undersaturated Alkalic Porphyry Cu-Au Deposit, Galore Creek, B.C by :
Download or read book The Southwest Zone Breccia-centered Silica-undersaturated Alkalic Porphyry Cu-Au Deposit, Galore Creek, B.C written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Situated in northwest B.C Canada, the Southwest Zone Cu-Au breccia-centered deposit is one of twelve mineralized centers in the Galore Creek alkalic porphyry district. Formed in an island arc-setting outboard of ancestral North America in the lateTriassic, deposits in the Galore Creek district have a combined measured and indicated resource of 785.7 Mt at 0.52 per cent Cu, 0.29 g/t Au and 4.87g/t Ag. Mineralisation in the Southwest Zone is centered in narrow hydrothermally cemented breccias. Composite dikes of megacrystic orthoclase-phyric syenite and megacrystic orthoclase and plagioclase-phyric monzonite are cut by polylithic, poorly sorted pebblecobble clast size matrix-rich breccias. Hydrothermally cemented breccias, characterised by the cement (infill) assemblage phlogopite " K-feldspar " magnetite " anhydrite " diopside " suiphide, overprint the western contact between matrix-bearing breccias and megacrystic porphyries. Coeval with cemented breccia formation, intrusions of biotite phyric monzodiorite occur at the matrix-bearing breccia-wall rock contact and in the matrix-bearing breccias. Biotite-phyric monzodiorite and the principal cemented breccia domains are co-spatial and syn-Cu-Au. Drilling has outlined a zone of>0.3% hypogene Cu approximately 20-100m thick, 500m wide and 400m in length that strikes 100, dips 45-60°S, and has a semiellipsoidal morphology. This mineralisation is coincident with potassic (stage D) alteration and infill. Cu-poor, diopside-dominated (calc-[potassic]) alteration formed contemporaneously with, and locally flanks, potassic-D infill. Sulphide minerals are zoned from a core of chalcopyrite-bomite, to chalcopyrite>pyrite, to pyrite>chalcopyrite out to pyrite only. Garnet-bearing peripheral propylitic alteration overlaps with a pyrite and Au-halo and locally overprints potassic and calc-Q, otassic) assemblages. Based on electron microprobe analysis, systematic spatial variations in Ti-content and Fe3/Fe2 of infill biotite are evi.
Book Synopsis Hydrothermal Alteration and Mineralization Zoning of the Pashpap Copper-molybdenum Porphyry Deposit, Ancash, Peru by : Raul A. Escarrachi Maldonado
Download or read book Hydrothermal Alteration and Mineralization Zoning of the Pashpap Copper-molybdenum Porphyry Deposit, Ancash, Peru written by Raul A. Escarrachi Maldonado and published by . This book was released on 1977 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genesis of Acid-sulfate Alteration and Au-Cu-Ag Mineralization at Summitville, Colorado by : Roger Eben Stoffregen
Download or read book Genesis of Acid-sulfate Alteration and Au-Cu-Ag Mineralization at Summitville, Colorado written by Roger Eben Stoffregen and published by . This book was released on 1985 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Geochemical Study of Alteration and Mineralization in the Wallapai Mining District, Mohave County, Arizona by : James Robert Lang
Download or read book A Geochemical Study of Alteration and Mineralization in the Wallapai Mining District, Mohave County, Arizona written by James Robert Lang and published by . This book was released on 1986 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mineralization and Hydrothermal Alteration in Porphyry Copper Deposits by : Luis Martínez
Download or read book Mineralization and Hydrothermal Alteration in Porphyry Copper Deposits written by Luis Martínez and published by . This book was released on 1968 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Evolution, Vein Orientation, and Paragenesis of the Botija Porphyry Cu-Mo-(Au) Deposit, Colón, Panamá by : Michael D. Sepp
Download or read book Structural Evolution, Vein Orientation, and Paragenesis of the Botija Porphyry Cu-Mo-(Au) Deposit, Colón, Panamá written by Michael D. Sepp and published by . This book was released on 2016 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Botija Cu-Mo-Au porphyry deposit is located in the Cobre Panamá mining district, which contains several deposits with a global measure and indicated and inferred resource of 14.8 MT of Cu. These deposits are associated with the Cerro Petaquilla batholith, which has U/Pb zircon ages of 26-33 Ma (Whattam et al., 2012; Baker et al., 2016). The Botija deposit is an elongate tabular body striking northeast and dipping 20-40° N and measures 2 km (length) x 1 km (width) x 600 m (height) in size. The deposit is hosted in andesite, the equigranular Petaquilla granodiorite, and a younger crowded porphyritic granodiorite with 15-50 vol.% groundmass of quartz and K-feldspar. Phenocrysts include plagioclase, hornblende ± K-feldspar and occasionally 5-15 vol.% rounded quartz eyes. Ore is characterized by Cu-Fe sulfides (chalcopyrite > bornite) that is dominantly disseminated, but also present in magmatic-hydrothermal quartz veins. Systematic vein measurements at Botija demonstrate that copper ores are spatially associated with a quartz vein density >0.5 vol.%; these veins have two modes of structural orientation (azimuth of strike/right-hand dip) of 233/50°NW and 295/45°NE. Most similar early quartz veins are emplaced along near-vertical hydrofractures in numerous porphyry deposits globally. The present dip of these quartz veins suggest that the veins and the Botija deposit have been moderately tilted about 40° south-southeast after mineralization. Typical potassic and sericitic alteration and zonation is present in Botija, however, a late overprint of chlorite and zeolite has obscured much of the original magmatic hydrothermal alteration footprint. Although the Botija deposit exhibits many of the common porphyry copper features, its geometry is atypical with abrupt spatial transitions (
Book Synopsis Petrographic Study with Respect to Mineralization/alteration of the Morrison Porphyry-type Copper Deposit, Babine Lake Area, Central British Columbia by : Jock M. Graham
Download or read book Petrographic Study with Respect to Mineralization/alteration of the Morrison Porphyry-type Copper Deposit, Babine Lake Area, Central British Columbia written by Jock M. Graham and published by . This book was released on 1982 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Porphyry Cu-Au-Mo Deposits by : Jane M. Hammarstrom
Download or read book Porphyry Cu-Au-Mo Deposits written by Jane M. Hammarstrom and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nature and Origin of Fissure Ore at the Porphyry-epithermal Transition Zone of the Bingham Canyon Porphyry Cu-Au-Mo Deposit, Utah by : David Harris Tomlinson (Jr.)
Download or read book Nature and Origin of Fissure Ore at the Porphyry-epithermal Transition Zone of the Bingham Canyon Porphyry Cu-Au-Mo Deposit, Utah written by David Harris Tomlinson (Jr.) and published by . This book was released on 2019 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evolution of Supergene Enrichment in the Morenci Porphyry Copper Deposit, Greenlee County, Arizona (PHD). by : Merritt Stephen Enders
Download or read book Evolution of Supergene Enrichment in the Morenci Porphyry Copper Deposit, Greenlee County, Arizona (PHD). written by Merritt Stephen Enders and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydrothermal alteration and fluid evolution of the Grasberg porphyry Cu-Au deposit, Irian Jaya, Indonesia by : Jeffrey S. Harrison
Download or read book Hydrothermal alteration and fluid evolution of the Grasberg porphyry Cu-Au deposit, Irian Jaya, Indonesia written by Jeffrey S. Harrison and published by . This book was released on 1999 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
