Bilder von porphyry copper deposits
Characteristics of porphyry copper deposits include:
Porphyry copper deposit | mineralogy | Britannica
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 ...
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.
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 ...
Preliminary Model of Porphyry Copper Deposits
Porphyry copper deposits result from the complex interactions and feedbacks of many processes. Owing to the complexity, a succinct definition that includes the essential attributes of this deposit class is elusive. Consequently, this descriptive model uses a working definition of a porphyry copper deposit. A porphyry copper deposit is defined as follows: 1. One wherein copper-bearing sulfides ...
Porphyry copper deposits in China | Request PDF
13.01.2019 · 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 - an overview | ScienceDirect Topics
Porphyry deposits are large, low- to medium-grade deposits in which primary (hypogene) ore minerals are dominantly structurally controlled and are spatially and genetically related to felsic to intermediate porphyritic intrusions (Kirkham, 1971, 1972).The main metals in a porphyry are Cu, Mo, and smaller amounts of gold, although Sn, W, and Ag can be found in some porphyry deposits (Kirkham ...
PORPHYRY DEPOSITS - Earth Science
Plutonic porphyry copper deposits occur in batholithic settings with mineralization principally occurring in one or more phases of plutonic host rock. 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 ...
Explainer: Why are so many explorers chasing a …
01.03.2020 · When it comes to porphyry deposits, size counts. These multigenerational monsters are responsible for ~60 per cent of the world’s copper, most of its molybdenum, and significant amounts of gold and silver. Their easy-mining large volumes make up for the low grades, typically between 0.3 per cent to 1 per cent copper equivalent. But these […]
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. View. Show in a web browser window: Global. Show in Google Earth or other KML viewer: porcu.kml (uncompressed 1.2M bytes) porcu ...
Porphyry Copper Deposit Model - USGS
Porphyry Copper Deposit Model By David A. John, editor, with contributions by Robert A. Ayuso, Mark D. Barton, Richard J. Blakely, Robert J. Bodnar, John H. Dilles, Floyd Gray, Fred T. Graybeal, John C. Mars, Darcy K. McPhee, Robert R. Seal, Ryan D. Taylor, and Peter G. Vikre Chapter B of Mineral Deposit Models for Resource Assessment . This report contains a revised descriptive model of ...
Porphyry Deposits Showing Potential for High …
Copper porphyry deposits are the go-to for global copper production for several good reasons. Their enormous size, district-scale potential, extensive mine life, polymetallic nature, amenability ...
Liberty Gold Announces Closing of the Sale of the …
12.08.2020 · Liberty Gold Announces Closing of the Sale of the Halilağa Porphyry Copper Gold Deposit in Turkey, and Receipt of US$6,000,000 Cash Payment . Email Print Friendly Share. August 12, 2020 13:00 ET ...
(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. However, generation of ...
Medet, Porphyry copper deposit - USGS
Bogdanov, B.D., 1986, Copper ore deposits in Bulgaria, in Petraschek, W.E., and Jankovi?, S., eds., Geotectonic evolution and metallogeny of the Mediterranean area ...
Tempo of magma degassing and the genesis of …
12.01.2017 · Porphyry deposits are copper-rich orebodies formed by precipitation of metal sulphides from hydrothermal fluids released from magmatic intrusions that cooled at depth within the Earth’s crust.
How Much Water in Basaltic Melts Parental to …
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 magmas with slab-derived H2O.
Porphyry Copper Deposit Density | Economic …
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 chance of at least four, a 50 percent chance of at ...