Porphyry model
Porphyry is the name given to decorative granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass. The larger crystals are called phenocrysts. In its non-geologic, traditional use, the term porphyry usually refers to the purple-red form of this stone, valued for its appearance, but other colour… WebOct 20, 2024 · On the left, the model shows the three alteration zones (propylitic, phyllic, and potassic) along with the ore body. On the right, it is the same thing but with the pyrite halo. This copper porphyry model was developed by David Lowell who had discovered a massive amount of porphyrys in his career.
Porphyry model
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WebUSGS WebJul 15, 2024 · The porphyry Cu deposit model has proven to be an extremely useful exploration tool and recent developments may have significantly enlarged the detectable fo...
WebThe rationale for the choice of the porphyry copper-gold model of Cox and Singer (1992) was based on our ability to identify characteristics in the known Arizona deposits that are unique to the porphyry Cu-Au deposit model and on our ability to distinguish a geologic setting for gold-rich porphyries that is different from the general porphyry-copper … WebThere are five key factors that can give rise to porphyry development: 1) compression impeding magma ascent through crust, 2) a resultant larger shallow magma chamber, 3) enhanced fractionation of the magma along with volatile saturation and generation of magmatic-hydrothermal fluids, 4) compression restricts offshoots from developing into …
WebSep 4, 2010 · Porphyry copper deposit model: Chapter B in Mineral deposit models for resource assessment September 4, 2010 This report contains a revised descriptive model … WebU.S. Geological Survey Publications Warehouse
WebJan 1, 2010 · This interpretation supports the classic vapor plume model for porphyry copper ore formation but additionally emphasizes the role of sulfur-bearing complexes as a key chemical control on magmatic-hydrothermal metal transport and the deposition of Cu and Au in porphyry ores.
WebOct 21, 2024 · On the left, the model shows the three alteration zones (propylitic, phyllic, and potassic) along with the ore body. On the right, it is the same thing but with the pyrite halo. This copper... great clips medford oregon online check ingreat clips marshalls creekWebThis report provides a descriptive model for arc-related porphyry molybdenum deposits. Presented within are geological, geochemical, and mineralogical characteristics that … great clips medford online check inhttp://earthsci.org/mineral/mindep/phor_dep/por_dep.html great clips medford njWebApr 26, 2024 · Many geological descriptions of porphyry Cu-Au deposits use the term "potassic alteration". However, this is actually a rather unspecific umbrella term for three different secondary mineral... great clips medina ohWebOct 29, 2024 · Some explorers use models to determine an end to drilling, but the successful geologist will understand how this porphyry may vary from the standard model and thereby drill on. New laboratory SEM ... great clips md locationsWebFeb 22, 2024 · The porphyry footprint modeling method works by taking an idealized model of a porphyry copper system and moving it through 3D space. The core of the system is placed at every voxel in a 3D model. At every voxel, the fit between observed data and the idealized model are examined and a score is assigned with a value between 0 and 1. great clips marion nc check in