· The ore in copper porphyry deposits is usually located between the potassic and phyllic alternations. There is a pyrite halo surrounding the ore. Chlorite, calcide, epidote, and adularia are commonly present in the propylitic alteration. Pyrite is …

2020. Porphyry copper deposits are formed by aqueous fluids exsolved by differentiated, mantle-derived magmas variably mixed with crustal melts. Water is essential to form porphyry Cu mineralization, and…. 7. PDF. Sulfide-bearing cumulates in deep continental arcs: The missing copper reservoir.

Copper was mostly removed from the sericitic capping, but iron, molybdenum, and gold were relatively immobile during supergene leaching.Interpretation of the space-time patterns and relations of the mineralization, alteration, volcanism, and intrusion allows reconstruction of the depositional environments of the El Salvador porphyry copper deposit.

Porphyry Cu deposits in China contain a total resource of ~47 million tonnes (Mt) Cu at average grades rangingmostly from 0.2 to 0.7% Cu (most Approximately 50% of the giant and ~35% of the intermediate porphyry Cu deposits in China formed in arcsettings. The Xiongcun, Pulang, Duobuza, Bolong, and Naruo deposits in Tibet formed in continental arc settings, and the …

Porphyry deposits are the world's most important source of Cu and Mo, and are major sources of Au, Ag, and Sn; significant byproduct metals include Re, W, In, Pt, Pd, and Se. They account for ...

 · So how do we explore for Porphyry Copper Deposits which are completely covered by barren younger rocks? Well let's back up a bit, we know that porphyries form under large subduction related volcanoes and that most …

Porphyry copper deposits represent an important resource and the dominant source of copper that is mined today to satisfy global demand. [5] 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. [5]

 · Mineral deposits within the Copper Mountain (Similkameen) mining camp are located 15 km south of Princeton, British Columbia and 180 km east of Vancouver (Lat. 49°20ʹ, Long. 120°31ʹ, N.T.S. 92 H/7E; Fig. 4).

Porphyry copper deposits originate in or nearby porphyritic intrusives which were saturated by water as they intruded in shallow areas of the crust (less than 6 km depth). The developing hydrothermal systems are characterized by the interaction, to different degrees, of fluids coming directly from the parental intrusive and from meteoric ...

 · The link between reduced porphyry copper deposits and oxidized magmas. Geochim. Cosmochim. Acta 103, 263–275 (2013). Article Google Scholar Kiseeva, E. S. & Wood, B. J. A simple model for ...

 · Porphyry ore deposits supply much of the copper, molybdenum, gold and silver used by humans. A review of the main processes that trigger porphyry ore formation suggests that sulphide saturation of ...

 · Porphyry copper deposit density is inversely related to the exposed area of permissive rock. The linear regression line and confidence limits constructed with the 19 control areas can be used to estimate the number of undiscovered deposits, given the size of a permissive area. In an example of the use of the equations, we estimate a 90 percent ...

 · Porphyry copper deposits form in continental magmatic arcs along convergent plate-margin boundaries or in island-arc environments. The deposits are associated with subduction-related volcanic centers, although in some examples, they are thought to be associated with postcollisional volcanism. Permissive magmatic-arc environments may be ...

 · Porphyry copper deposits ppt. Here let's understand the geology of porphyries and iron oxide copper gold deposits or IOCG as they are known. …

This report contains a revised descriptive model of porphyry copper deposits (PCDs), the world's largest source (about 60 percent) and resource (about 65 percent) of copper and a major source of molybdenum, gold and silver. …

 · Porphyry copper deposits form along convergent plate margins or more specifically, ancient subduction zones. As the dense oceanic crust becomes consumed by the mantle it begins to melt. This melting or partial melting of the …

Porphyry copper deposits of the world. Information on porphyry copper deposits from around the world with grade and tonnage models, a general classification based on geologic setting, mineralogy, with data allowing locations of these deposits to be plotted using GIS.

 · Porphyry copper deposits (PCDs) represent shallow level intrusions (2–5 km) in the crust. Mineralization of Cu ores tend to occur at the tops of porphyry systems in cupolas. Possible regimes where Cu may be mobilized include hydrothermal circulation at mid-ocean ridge centers, dehydration or melting of the subducting slab, and late stage ...

The cumulative probability of forming a large porphyry Cu deposit at any given time in an arc magmatic system (i.e., a single batholith-linked volcanoplutonic complex) is estimated to be ~0.001%, and less than 1/10 of these deposits will be uplifted and exposed at shallow enough depths to mine economically (0.0001%).

Keywords: ash-flow caldera, bimodal magmatism, Japan, porphyry Cu deposits, reduced crust, South Korea. 1. Introduction Copper has been mined in Japan since the ninth cen-tury; the Ashio replacement and vein deposit – the country's largest with historical production of 0.8 Mt. of Cu metal – was first mined in the early 17th

 · other large porphyry deposits such as Bingham Canyon in the western United States formed during the earliest stages of Basin and Range extension in the Eocene, far inland from the Pacific margin of North America (Kloppenburgh et al., 2010). Noncollisional porphyry copper deposit examples in sub-duction-related arc settings include those from ...

The porphyry copper deposits in China typically contain ~3-313 t of Re at average grades ranging from 0.03 to 0.5 g/t Re, with ten deposits containing >50 t Re. The Re-rich porphyry copper ...

 · Porphyry copper deposits are typically very-low grade with between 0.4 and 1% copper. The main mineral is chalcopyrite, which is finely disseminated through the host porphyritic rocks. The only reason these ore bodies are …

 · Porphyry copper deposits ppt. Here let's understand the geology of porphyries and iron oxide copper gold deposits or IOCG as they are known. These are somewhat the giants of the ore deposits world. As a mining …