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 … WebThe aim of the project is to confirmed the initial porphyry model of the area and to assist deep… Lihat selengkapnya The preliminary magnetotelluric study or electromagnetic mapping (Emap) has conducted in Doup Porphyry Au - Cu project at Kotabunan, North Sulawesi. The survey used 25m Tx spacing within 1000m length and 100m line spacing …
Porphyry copper deposits of the world - USGS
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. 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. how are allergies distinguished from a cold
Porphyry copper deposit model: Chapter B in Mineral deposit …
WebIn the original classification of subtypes of porphyry copper deposits (Cox and Singer, 1986, 1992) the classes were defined by the Au/Mo ratios, but the published grade and tonnage model for the Cu-Au-Mo (model 17) included all deposits from all subtypes and did not follow the separation of subtypes based on the Au/Mo ratio. Here we strictly WebJul 6, 2024 · Porphyry deposits are large, low-grade metal ore bodies that are formed from hydrothermal fluids derived from an underlying magma reservoir. They are important as major sources of critical metals... 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, … how are allergic reactions best avoided