Porphyry alteration model

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August undefined, 2024

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 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 …

Porphyry Systems and Skarns SpringerLink

WebOct 12, 2012 · Potassic alteration is often formed in the neighbor of intrusion porphyry showing intense potassium feldspar + quartz veins (matrix or groundmass) and consists mainly of secondary biotite, anhydrite, and magnetite associated with chalcopyrite, bornite, and/or minor molybdenite intergrowth with quartz. 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. citizenship lawyer calhoun county

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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 ... Webalteration in many porphyry systems ADVANCED ARGILLIC INTERMEDIATE ARGILLIC This is an intense alteration phase, often in the upper part of porphyry systems. It can also form … WebApr 15, 2024 · The magmatic process within upper crust encompasses various contents such as the transition between magmatic and hydrothermal systems and changes in oxygen fugacity (ƒO2), which ultimately play key roles in the formation of porphyry Cu deposits (PCDs). However, tracing these magmatic processes, especially in porphyry systems, is … citizenship lawyer fees

Arc-Related Porphyry Molybdenum Deposit Model - USGS

WebUSGS 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). citizenship laws by countryWebPorphyry 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 … citizenship laws philippines

"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 alteration model

Porphyry alteration model

Porphyry Copper Deposits of the World: Database And Grade …

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. WebAlteration Strong alteration zones develop in and around granitic rocks with related porphyry deposits. Often there is early development of a wide area of secondary biotite that gives the rock a distinctive brownish colour. Ideally, …

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http://earthsci.org/mineral/mindep/phor_dep/por_dep.html WebAug 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 ...

WebSep 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 WebOct 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 …

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. Webcurrent model for staged porphyry development illustrated in figure 3. • Emplacement of the porphyry intrusion, commonly as an apophysis to a larger underlying magmatic source, …

WebDec 14, 2024 · RS is an effective method for porphyry copper mineral exploration and prospecting prediction. More specifically, the Advanced Spaceborne Thermal Emission …

dickhut cateringWebApr 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). citizenship lawyer lake countyWeb2.2.3 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 … dick hustonWebGeneralized Porphyry Copper Model –Anatomy and Alteration Zoning Anatomy of Calc-alkalic Porphyry Copper and Related Mineralization Alteration Zonation Patterns in Calc … citizenship laws in usaWebHydrothermal alteration provides a key component to the identification of a deposit. Alteration usually is zoned from a core of potassic plus/minus silicic alteration outwards through phyllic to propylitic alteration. Argillic alteration may be irregular in shape and will overprint earlier hydrothermal alteration. citizenship laws australiaWebDec 15, 2024 · Porphyry systems include shallow intrusions (to 2-3 km depth) that have halos of biotite ± K-feldspar alteration; a lower temperature overprint of white mica ± chlorite alteration is common,... citizenship laws in usPorphyry 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… citizenship lawyer houston county