Porphyry alteration model

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August undefined, 2024

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 … 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 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. Webdispersed magmatic-hydrothermal alteration and mineralization. Porphyry copper deposits are large (commonly hundreds to thousands of million tonnes) and low to medium in grade (0.3 to 1.5% copper). The majority of gold-rich porphyry deposits occur in the circum-Pacific and commonly contain 0.3 to 1.6 g/t gold. inflamed testicle treatment

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http://earthsci.org/mineral/mindep/phor_dep/por_dep.html 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). WebPorphyry deposits are characterized by disseminated, veinlet- and fracture-controlled copper-iron sulphide minerals distributed throughout a large volume of rock in association … inflamed tendon in ankle

Porphyry Systems and Skarns SpringerLink

The tops and bottoms of porphyry copper deposits

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 … 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, … inflamed testicles symptomsPorphyry 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… inflamed tendon top of foot

"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 … " - Porphyry alteration model

Porphyry alteration model

A Remote-Sensing-Based Alteration Zonation Model of …

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 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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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. WebPorphyry copper deposits are normally located in the basement beneath a comagmatic volcanic pile, which is transected by a column of hydrothermal alteration representing the upper parts of the porphyry copper system. This alteration consists of propylitic and argillic types with localized patches of silicification and advanced argillic alteration.

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 … WebJun 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 ...

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). 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 …

WebHydrothermal 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.

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 … inflamed third eyelidWebUSGS inflamed testicleWebOct 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 ... inflamed tendon in shoulder treatmentWebGeneralized 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. inflamed testicle painWebAbstract 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, … inflamed third eyelid of dogWebDec 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,... inflamed testicle sackWebCopper 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 inflamed throat vs normal