Porphyry alteration model

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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 ... WebOct 21, 2024 · Here is another picture frequently used to show copper porphyry model. On the left, the model shows the three alteration zones (propylitic, phyllic, and potassic) along with the ore body. On the ...

Porphyry Copper Deposits of the World: Database And Grade …

WebPorphyry 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 … WebDec 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,... photo hashing

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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 … 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 … 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 … how does google authenticator generate code

Arc-Related Porphyry Molybdenum Deposit Model - USGS

PORPHYRY DEPOSITS - Earth Sci

WebAbstract The root zone of a porphyry system is a specific region beneath a porphyry orebody that was a site of focused fluid flow, as evidenced by abundant quartz veins, … WebPorphyry deposits are characterized by disseminated, veinlet- and fracture-controlled copper-iron sulphide minerals distributed throughout a large volume of rock in association … photo harvest festivalWebPorphyry 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 … photo harvey norman

"WebUSGS " - Porphyry alteration model

Porphyry alteration model

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 … WebEssential elements of this genetic model are (1) shallow emplacement of a usually complex series of porphyritic dikes or stocks in and above the cupola zone of a calc-alkaline batholith; (2) separation of magmatic fluids and simultaneous metasomatic introduction of copper, other metals, sulfur, and alkalies into both the porphyries and wall …

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WebDec 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 … WebGeneralized Porphyry Copper Model –Anatomy and Alteration Zoning Anatomy of Calc-alkalic Porphyry Copper and Related Mineralization Alteration Zonation Patterns in Calc …

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.

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 … 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, …

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WebDec 14, 2024 · RS is an effective method for porphyry copper mineral exploration and prospecting prediction. More specifically, the Advanced Spaceborne Thermal Emission … photo harry potter 2WebCopper 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 how does google cloud billing workWebPorphyry 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 … how does google calendar workWebJun 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, … how does google calculate ad rankWeb2.2.3 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 … photo harry potter filmPorphyry 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… how does google cast workWebAlteration 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, … how does google choose ads