Porphyry copper deposits of the world USGS
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 Deposit Model USGS
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.
What is a Porphyry Copper Deposit?
2015-6-27 Porphyry copper deposits are also important sources for other metals, including molybdenum, gold and silver. Minor amounts of rhenium, tellurium, arsenic, zinc and platinum group elements are also present in elevated concentrations within these systems and are recovered at some mining operations.
Porphyry copper deposit mineralogy Britannica
2018-11-20 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 other copper minerals are disseminated.Porphyry copper deposits commonly contain hundreds of millions of metric tons of ore that averages a fraction of 1 percent copper
(PDF) The formation of porphyry copper deposits
2016-11-5 Porphyry ore deposits are the source of much of the copper, molybdenum, gold and silver used by humans. Porphyry ore typically forms in magmatic arcs above
How to make porphyry copper deposits ScienceDirect
2020-1-1 Like most ore deposits, porphyry copper deposits (PCDs) are rare, but they exhibit spatiotemporal patterns of distribution and geochemical signatures that may hint at their origins. They represent shallow level intrusives (2–5 km) (Sillitoe, 2010), not too shallow that they erupt and not too deep that they do not degas (Fig. 1).
The formation of porphyry copper deposits SpringerLink
2016-11-5 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
Gold in porphyry copper deposits: its abundance and fate
2002-10-1 Porphyry copper deposits are among the largest reservoirs of gold in the upper crust and are important potential sources for gold in lower temperature epithermal deposits. Whether gold remains in porphyry copper deposits is important both to their economic attractiveness and to the distribution of gold in the upper crust.
Porphyry Deposits: The World’s Largest Source of Copper
2014-5-28 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 crust creates magma
PORPHYRY DEPOSITS Earth Sci
2017-6-26 Porphyry copper deposits comprise three broad types: plutonic, volcanic, and those we will call "classic". The general characteristics of each are illustrated in photographs linked near the bottom of this page.&. 1. Plutonic porphyry copper deposits
The formation of porphyry copper deposits SpringerLink
2016-11-5 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 are usually oxidized (with oxygen fugacities > ΔFMQ +2) (Mungall 2002; Sun et al. 2015). The problem is that while most of the magmas at convergent margins are highly oxidized, porphyry Cu deposits
Basics of Copper Porphyry Deposits for Investors Classic
2020-10-20 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 commonly found in the phyllic alteration.
Looking for Copper- How are Porphyry Deposits formed
2021-2-16 Copper minerals such as chalcopyrite, bornite, and chalcocite occur along with gold and molybdenite in stock work veins and disseminated in the host rock. These predictable alteration and mineralization assemblages help guide geologists looking for copper porphyry deposits. Workers can use mapping and then drilling to define the mineral resource.
(PDF) Porphyry Copper Deposit Model Ana Viana
Porphyry Copper Deposit Model. 186 Pages. Porphyry Copper Deposit Model. Ana Viana. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. Porphyry Copper Deposit Model.
Porphyry copper deposits in China Open Access Repository
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 Central Asian porphyry Cu
Gold in porphyry copper deposits: its abundance and fate
2002-10-1 1.. IntroductionPorphyry copper deposits contain up to 100 t of gold and are among the largest reservoirs of gold in the upper crust (Kerrich et al., 2000).They are commonly surrounded by deposits and country rock containing gold that is thought to have been derived from them (Jones, 1992).Gold can be removed from porphyry copper systems by vapors that separate at high
1714 PDFs Review articles in PORPHYRY DEPOSITS
Copper, sourced from porphyry deposits formed in arc settings, is a critical resource, and is primarily sourced from magmas. However, the processes that shape the copper contents of arc magmas are
Geology and origin of the Zhunuo porphyry copper
2020-4-16 The Zhunuo porphyry copper deposit in the Gangdese belt of southern Tibet contains 2.37 Mt at 0.57% Cu. In this deposit, Eocene rhyolite (51.6 ± 1.0 Ma) and quartz porphyry (49.1 ± 0.6 Ma) were intruded by monzogranite (14.7 ± 0.3 Ma) and monzogranite porphyry (14.5 ± 0.2 Ma) which commonly host mafic microgranular enclaves (14.9 ± 0.3 Ma). Late-mineralization diorite porphyry
PORPHYRY COPPER DEPOSITS OF THE WORLD:
2002-8-6 Subtypes of porphyry copper deposits are defined in Cox and Singer (1992) as: porphyry Cu-Au (type 20c) if Au/Mo greater than or equal to 30, porphyry Cu-Mo (type 21a) if Au/Mo less than or equal to 3, and porphyry Cu (type 17) otherwise, where gold is in parts per million and molybdenum is in percent. Skarn-related porphyry copper deposits 3
Porphyry copper deposit mineralogy Britannica
2018-11-20 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 other copper minerals are disseminated.Porphyry copper deposits commonly contain hundreds of millions of metric tons of ore that averages a fraction of 1 percent copper
The formation of porphyry copper deposits SpringerLink
2016-11-5 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 are usually oxidized (with oxygen fugacities > ΔFMQ +2) (Mungall 2002; Sun et al. 2015). The problem is that while most of the magmas at convergent margins are highly oxidized, porphyry Cu deposits
eCite 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).
Looking for Copper- How are Porphyry Deposits formed
2021-2-16 Copper minerals such as chalcopyrite, bornite, and chalcocite occur along with gold and molybdenite in stock work veins and disseminated in the host rock. These predictable alteration and mineralization assemblages help guide geologists looking for copper porphyry deposits. Workers can use mapping and then drilling to define the mineral resource.
Porphyry copper deposits SlideShare
2018-7-31 Porphyry copper deposits Epithermal 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
Grasberg, Porphyry copper deposit USGS
Potter, D., 1996, What makes the Grasberg anomalous, implications for future exploration, in Porphyry related copper and gold deposits of the Asia Pacific region: Conference Proceedings, Australian Mineral Foundation, Glenside, South Australia, p. 10.1 10.13.
1714 PDFs Review articles in PORPHYRY DEPOSITS
Copper, sourced from porphyry deposits formed in arc settings, is a critical resource, and is primarily sourced from magmas. However, the processes that shape the copper contents of arc magmas are
Crustal magmatic controls on the formation of porphyry
2021-7-6 Porphyry deposits are large, low-grade metal ore bodies that are formed from hydrothermal fluids derived from an underlying magma reservoir. They are
The geological characteristics, geochemical signature
2020-1-14 mineralization. Porphyry copper deposits are large (commonly hundreds to thousands of million tonnes) and low to medium in grade (0.3 to 1.5% copper). The majority of gold-rich porphyry deposits occur in the circum-Pacific and commonly contain 0.3 to 1.6 g/t gold. The general characteristics of porphyry systems include:
