Afbeeldingen van porphyry copper deposits
Porphyry Deposits: The World’s Largest Source of Copper
Geology of Porphyry Copper Deposits
Understanding Geology of Porphyry Copper Deposits and formations using models around the World. Porphyry Copper Deposits are the largest source of Cu/Mo/Au.
Porphyry copper deposit | mineralogy | Britannica
19-11-2018 · 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 by weight; although they are low-grade, the ...
How to make porphyry copper deposits - …
01-01-2020 · 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 scavenging by magmatic fluids (green arrows).
Porphyry Copper Deposits | Geology for Investors
11-09-2020 · 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 economic is because porphyries are huge, with hundreds of millions of tonnes available in a fairly low-cost mining setting.
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.
(PDF) The formation of porphyry copper deposits
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 subduction zones.
PORPHYRY DEPOSITS - Earth Science
PORPHYRY COPPER CLASSIFICATION 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.
Everything You Need to Know About Copper …
Porphyry deposits are very large, polymetallic systems that typically contain copper along with other important metals. Much of today’s mineral production depends on porphyries: 60% of copper, 95% of molbdenum, and 20% of gold comes from this deposit type.
Porphyry copper deposits in China | Request PDF
30-04-2020 · Request PDF | 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 …
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.
Porphyry Copper Systems* - University of Utah
Porphyry Copper Systems* RICHARD H. SILLITOE† 27 West Hill Park, Highgate Village, London N6 6ND, England Abstract Porphyry Cu systems host some of the most widely distributed mineralization types at convergent plate boundaries, including porphyry deposits centered on intrusions; skarn, carbonate-replacement, and sediment-
Porphyry Deposits Showing Potential for High …
Copper porphyry deposits are responsible for 75 percent of the world’s copper resources and reserves, and 20 percent of global gold production.
Prospectivity Mapping for Porphyry Copper …
Porphyry copper deposit density prospectivity model for Laramide-age tract in southern Arizona, calculated using Arizona map data and spatial model parameters derived from a previous GMRAP assessment (geology, alteration mapping, geochemistry) for all porphyry copper tracts in Mexico (Hammarstrom et al., 2010).
Preliminary Model of Porphyry Copper Deposits
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.
What is a Porphyry Copper Deposit?
porphyry copper deposits were the first type of metallic mineral deposit to be exploited by large-scale, bulk tonnage, open pit mining methods. Economies of scale and advances in technology have made it possible to profitably mine these deposits despite their relatively low ore grades.
Elatsite, Porphyry copper deposit
Deposit type: Porphyry copper: Deposit subtype: Cu-Au: Age (Ma) 92 Ma: Age determination method: Re-Os molybdenite: Age range: 91.88 ±0.5 to 92.43 ±0.3 Ma (Re-Os molybdenite); 92.10 ±0.3 Ma and 91.84 ±0.3 Ma (U-Pb zircon) Age reference: Zimmerman and others (2008); von Quadt, Peytcheva and others (2005) Minerals