Porphyry alteration model

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WebJun 1, 2024 · Propylitic alteration of intrusive rocks (e.g., Sewell diorite, Teniente dacite porphyry) is typified by chlorite and epidote alteration of the ferromagnesian minerals, … WebCopper and molybdenum deposits, potassic, phyllic, argillic, and propylitic alteration, emphasis on San Manuel-Kalamazoo deposit of Arizona, tabulated data on characteristics of North and South American deposits This content is PDF only. Please click on the PDF icon to access. First Page Preview

PORPHYRY DEPOSITS - Earth Sci

WebFigure 1. Staged model for porphyry development (from Corbett, 2024). The exploration implications of the understanding and application of this staged model for porphyry Cu-Au development lie in the use of vectors within wall rocks towards blind porphyry deposits and the interplay between mineralised and barren events. Porphyry copper deposits represent an important resource and the dominant source of copper that is mined today to satisfy global demand. Via compilation of geological data, it has been found that the majority of porphyry deposits are Phanerozoic in age and were emplaced at depths of approximately 1 to 6 kilometres with vertical thicknesses on average of 2 kilometres. Throughout the Phanerozoic an estimated 125,895 porphyry copper deposits were formed; howe… design with cad

Porphyry Copper Deposit Model - USGS

WebThe potassic alteration zone also contains sulfide minerals and is characterized in IP data with moderate to high-chargeability values. The IP method is the most extensively used geophysical approach in exploration of porphyry deposits. Magnetic minerals are enriched and destroyed respectively in potassic and phyllic alteration zones. Web2.2.3 Fluid pathways. In the porphyry-epithermal mineral system, pathways for fluids and their contained metals, ligands and sulfur include faults, stratigraphic aquifers and crystallising intrusive bodies. Crystallising … WebGeneralized Porphyry Copper Model –Anatomy and Alteration Zoning Anatomy of Calc-alkalic Porphyry Copper and Related Mineralization Alteration Zonation Patterns in Calc-alkalic Porphyry Systems Modified from: Sillitoe, 2010, Porphyry Copper Systems: Economic Geology, v. 105 p. 3-41. design with blocks

3D Primary Geochemical Halo Modeling and Its Application to ... - Hindawi

A Remote-Sensing-Based Alteration Zonation Model of …

WebAlthough high-temperature (>600 °C), high-salinity fluids (>70 eq wt% NaCl) were recognized in the porphyry stock, the mineralization formed from much lower temperature (<250°C) and salinity (<13 eq wt% NaCl) fluids, leading Goellnicht et al. (1988) to present a model in which a magmatic system was overprinted by weakly developed epithermal … http://earthsci.org/mineral/mindep/phor_dep/por_dep.html chuck fawcett realty van burenWebDec 14, 2024 · In this study, an RS alteration zoning model is established based on ground-spectral alteration zoning results. The methods include PCA (Principal Component … chuck fein attorney

"WebPorphyry systems are universally typified by three main features: (1) presence of veins and veinlets forming stockworks, within which are disseminated sulphides of Fe, Cu, Mo, Pb … " - Porphyry alteration model

Porphyry alteration model

In Situ Mineralogical Constraints on Magmatic Process for Porphyry …

WebFeb 2, 2024 · Comparing the geophysical models with the host lithologies indicated that the inner part of the primary quartz diorite porphyry as the host rock dominantly has potassic alteration, with lower Cu–Au grades, higher magnetic susceptibility, and lower resistivity. WebWALLROCK ALTERATION: Fine-grained hydrothermal biotite and biotite as stable phenocrysts are common in diorite porphyry and associated intrusive phases. In some deposits sericitic alteration is pervasive in and adjacent to the ore zone with potassic alteration at depth (biotite).

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WebJan 16, 2024 · Mineralization is hosted within Porphyry X, a crowded plagioclase porphyry of Cretaceous age (85.1Ma +- 1.1Ma), characterized by well-defined stacked biotite, a feature typical of mineral-related ... WebPorphyry systems are universally typified by three main features: (1) presence of veins and veinlets forming stockworks, within which are disseminated sulphides of Fe, Cu, Mo, Pb and Zn, as well as native Au, and minerals of W, Bi and Sn; (2) the mineralisation is spatially and genetically related to intrusive bodies, of which at least one has a …

WebApr 28, 2024 · The propylitic alteration model, characterized by the presence of epidote and chlorite, displays a significant correlation with both post-mineral dykes and with one of … WebChapter B of Mineral Deposit Models for Resource Assessment. This report contains a revised descriptive model of porphyry copper deposits (PCDs), the world’s largest source (about 60 percent) and resource (about 65 percent) of copper and a major source of …

WebPorphyry systems represent the world's principal source of copper and molybdenum and are major repositories of gold and silver (Cooke et al., 2014a). These deposits originate from … WebStaged model for porphyry development (from Corbett, 2024). ... from overprinting events of porphyry intrusion, alteration and mineralisation are better interpreted in a context of time. 2 EMPLACEMENT AND PROGRADE ALTERATION AND MINERALISATION Changes in the tectonic conditions, evidenced by vein kinematics, may act as triggers to initiate the ...

WebApr 24, 2024 · Very thorough Terraspec ® alteration analyses, conducted by Caza Gold and using a database containing in excess of 4,500 rock-chip samples, has identified that the most intense hydrothermal alteration at Los Andes is related to an outcropping porphyry body with strongly pyritic breccia located peripheral to it (see Figure 1). chuck feeney net worth 2019WebPorphyry deposits are a type of mineral deposit that form from large-scale hydrothermal systems associated with intrusive igneous rocks. They are characterized by the presence of porphyritic rocks that contain large … design with carpet tilesWebMay 1, 2024 · Propylitic alteration, particularly within relatively low permeability rocks, is fracture-controlled and a hierarchy of veins is observed. Veins of chlorite-quartz-pyrite ± … chuck feldmanWebOct 12, 2012 · The alteration model was followed from the modified Lowell and Gilbert model. The porphyry is stockworked by quartz veins and by quartz magnetite veins. Vein … chuck feeney net worth 1990WebSep 13, 2013 · Staged model for porphyry Cu-Au development – exploration implications Pacrim 2024, Auckland, New Zealand Controls to Tasmanide epithermal-porphyry Au-Cu Mineralisation – Exploration Implications Mines and Wines Conference, Orange, September 2024 Australian Institute of Geoscientists Bulletin 67 Pacific rim epithermal Au 2013 chuck feets minertWebJun 11, 2014 · Model for a Chilean type (Atacama Desert) giant porphyry copper deposit with a well developed supergene enrichment blanket (pale green) overlying a broad core of magnetite-destructive phyllic, advanced argillic and sericite–chlorite alteration (yellow), and a relict body of early biotite–magnetite alteration that has escaped strong phyllic ... chuck feeney philanthropyWebAug 20, 2024 · Porphyry alteration (with porphyry as the center) changed from the proximal potassic zone (hydrothermal biotite + quartz + K-feldspar) to the middle phyllic zone (quartz + sericite + phengite) and then the peripheral propylitic zone (chlorite + epidote + calcite + quartz). ... “Polycentric complex mineralization model of porphyry system: a ... chuck felmlee attorney lynchburg va