(PDF) /Critical elements in porphyry copper deposits …
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.Web
اقرأ أكثرGeology and mineralization of the Pulang supergiant porphyry copper
1. Introduction. Porphyry deposits are the main source of copper and molybdenum metals in the world, providing approximately 75% of copper, 50% of molybdenum, and 20% of gold for mankind (Sillitoe RH, 2010).The spatial-temporal distribution and genesis of porphyry deposits are closely related to dioritic and …Web
اقرأ أكثرPorphyry copper deposits of the world: database, map, and grade …
This publication contains a computer file of information on porphyry copper deposits from around the world. It also presents new grade and tonnage models for …Web
اقرأ أكثرPorphyry copper deposit | Ore genesis, Hydrothermal, Magmatic
Porphyry copper deposit, large body of rock, typically a porphyry of granitic to dioritic composition, that has been fractured on a fine scale and through which chalcopyrite and …Web
اقرأ أكثر(PDF) Footprints: The Hydrothermal Alteration and Geochemical
In porphyry copper systems, significant advances in the understanding of deposit footprints have been made over the last decades, including that of sericitic alteration (Watanabe and Hedenquist ...Web
اقرأ أكثرClues to hidden copper deposits | Nature Geoscience
Porphyry copper deposits are large. They commonly consist of hundreds of millions to billions of tonnes of ore. However, they contain typically only 0.5–1.5% copper and are therefore classified ...Web
اقرأ أكثرGold endowments of porphyry deposits controlled by
Porphyry copper–gold deposits are large volume, low-grade disseminations formed by precipitation of copper and gold (plus molybdenum) from fluids of magmatic origin 1.These deposits form at ...Web
اقرأ أكثرA new model for the optimal structural context for giant porphyry
We tested this hypothesis through an integration of all the relevant data available from the main Andean porphyry copper deposits. This region was selected because it constitutes by far the largest known Cu concentration in the planet (985 Mt of Cu; Sillitoe, 2012) and individual deposits of the belts include the largest known …Web
اقرأ أكثرA rapid change in magma plumbing taps porphyry copper deposit …
The transition to new and green technologies is increasing the need for metals 1, 2 such as copper for which demand is forecast to increase by 140–350% from 2010 to 2050 3, 4. Porphyry-type ...Web
اقرأ أكثرPorphyry 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 …Web
اقرأ أكثرClues to hidden copper deposits | Nature Geoscience
Porphyry copper ore deposits mostly form beneath volcanoes, where magmas derived from a mid- to upper-crustal magma reservoir intrude into the shallower …Web
اقرأ أكثرPorphyry copper deposit formation by sub-volcanic …
Porphyry copper deposits (PCDs, Fig. 1) have a broadly cylindrical distribution of mineralization (0.5–1 wt% Cu (ref. 4)) at the kilometre scale and are surrounded by more extensive zones of ...Web
اقرأ أكثرPorphyry Copper Deposit Formation: Identifying Garnet and …
1 Introduction. Empirical evidence for high oxidation state of porphyry-copper-deposit (PCD) generative arc magmas has been noted and discussed for decades (Burnham & Ohmoto, 1980; Hutchinson & Dilles, 2019; Park et al., 2021).These magmas typically record oxygen fugacity (fO 2) values equal or greater than the Ni–NiO fO 2 …Web
اقرأ أكثرPetrogenesis and thermal history of the Yulong porphyry copper deposit
The Yulong porphyry copper deposit (6.5 Mt at 0.46 % Cu) in eastern Tibet was formed in a post-collisional setting. New zircon U–Pb and U–Th/He ages, apatite U–Th/He ages and in-situ zircon Hf isotopic and trace element data for the Yulong ore-bearing adakitic porphyries elucidate the thermal history and petrogenesis of the …Web
اقرأ أكثرGeology and origin of the Zhunuo porphyry copper deposit, …
Zhunuo is a porphyry deposit in the western GPCB. It was discovered in 2004 by the No. 2 Geology Survey Team of Tibet, China. Zhunuo contains 2.3 Mt copper metals at an average grade of 0.57% (Sun et al. 2018).Previous studies have reported zircon U-Pb ages, geochemistry of igneous rocks and molybdenite Re-Os ages for the deposit …Web
اقرأ أكثرHow to make porphyry copper deposits
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 …Web
اقرأ أكثرGeology of the ndida Porphyry Copper Deposit, Antofagasta …
The ndida porphyry copper deposit, located in northern Chile, was one of the two largest copper producers of the world in the 1990s. The hydrothermal evolution of this deposit is associated with the emplacement of a late Eocene-Oligocene quartz monzonitic to granodioritic intrusive stock complex composed of at least three intrusive …Web
اقرأ أكثرChapter 5 Porphyry Copper Deposits in China
Porphyry Cu deposits in China contain a total resource of ~47 million tonnes (Mt) Cu at average grades ranging mostly from 0.2 to 0.7% Cu (most <0.5% Cu), accounting for 42% of China's Cu reserves. In terms of contained Cu, 14 Cu-rich porphyry deposits are classified as giant (≥2.0 Mt Cu), and 38 are classified as intermediate (≥0.06 Mt Cu).Web
اقرأ أكثرA new model for the optimal structural context for giant porphyry
In some porphyry copper deposits, the similarity between pre-, syn-and post-mineral intrusions in terms of texture and geochemistry is a known issue. This is also the case at the Gaby porphyry Cu ...Web
اقرأ أكثرPORPHYRY DEPOSITS
Intrusions Associated with PorphyryCopper Deposits Intrusions associated with, porphyry copper deposits arediverse but generally felsic and differentiated. Those in island arc settingshave primitive strontium isotopic ratios (87Sr/86Sr of 0.702 to 0.705) and, therefore, are derived either from upper mantle material orrecycled oceanic crust.Web
اقرأ أكثرPorphyry Cu mineralization in the eastern desert of Egypt
Significant features of porphyry copper deposits were observed in the southern part of the Eastern Desert of Egypt. These include wide distribution of gossans cover and pyrite-rich zones, chalcopyrite disseminations, zoned hydrothermally altered mafic volcanics, hydrothermal breccia pipes, and quartz-vein sets in close association with …Web
اقرأ أكثرPorphyry copper deposit formation in arcs: What are the odds?
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 …Web
اقرأ أكثرCrustal magmatic controls on the formation of porphyry copper …
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 …Web
اقرأ أكثر(PDF) The formation of porphyry copper deposits
Copper is a moderately incompatible chalcophile element. Its behavior is strongly controlled by sulfides. The speciation of sulfur is controlled by oxygen fugacity. Therefore, porphyry Cu deposits ...Web
اقرأ أكثرPorphyry Copper Deposit Model
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 …Web
اقرأ أكثرGold in porphyry copper deposits: its abundance and fate
Cu/Au atomic ratios of porphyry copper ore deposits form a continuous range from about 5000 to 5,000,000 with a median near 40,000, which separates gold-rich and gold-poor deposits. Gold is found in porphyry copper deposits in solid solution in Cu–Fe and Cu sulfides and as small grains of native gold, usually along boundaries of …Web
اقرأ أكثرOxidized sulfur-rich arc magmas formed porphyry Cu deposits by
Introduction. Porphyry Cu systems presently contribute ~75% of the world's Cu production and of the known deposits most formed in Phanerozoic arc-related settings 1, 2. The arc-related calc ...Web
اقرأ أكثرHow Much Water in Basaltic Melts Parental to Porphyry Copper Deposits?
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 this explains why these deposits are found only at convergent margin settings, where subduction has enriched the mantle source of …Web
اقرأ أكثرChapter 5 Porphyry Copper Deposits in China | Request PDF
Porphyry Cu deposits in China contain a total resource of ~47 million tonnes (Mt) Cu at average grades ranging mostly from 0.2 to 0.7% Cu (most <0.5% Cu), accounting for 42% of China's Cu reserves.Web
اقرأ أكثرPorphyry copper deposits in China | Request PDF
The Pulang deposit is a large-scale Late Triassic porphyry copper deposit in this region and is located at 28 • 02′19″ N, 99 • 59′23″ E, with an elevation of over 3300 m (Fig. 2c). ...Web
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