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 …
Porphyry alteration model
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WebMay 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 ± … 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.
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, … 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 ...
WebPorphyry deposits are characterized by disseminated, veinlet- and fracture-controlled copper-iron sulphide minerals distributed throughout a large volume of rock in association … 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.
Webporphyry Cu (type 17) otherwise, where gold is in parts per million and molybdenum is in percent. Here deposits with no reported molybdenum grade and with a Au grade greater than 0.2 g/t were classed as porphyry Cu-Au, whereas those with no gold grade reported, but with a Mo grade greater than 0.03 were classed as porphyry Cu-Mo types.
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 chinese soup with dumplingsWebEssential 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 … grand valley health my healthWebJan 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 ... grand valley golf courseWebStaged 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 ... grand valley graphic designWeb2.2.3 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 … grand valley grocery storePorphyry 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… grand valley graduation 2023WebFigure 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. grand valley health portal