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 …
Porphyry copper deposits are copper orebodies that are formed from hydrothermal fluids that originate from a voluminous magma chamber several kilometers below the deposit itself. Predating or associated with those fluids are vertical dikes of porphyritic intrusive rocks from which this deposit type derives its …
When it comes to porphyry deposits there are a number of variations on a theme and the deposits can be copper only, they can be copper gold, copper molybdenum or molybdenum only but regardless of the metal mix the process of deposit formation is the same.
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 copper deposits can also be associated with epithermal gold deposits formed by the same volcanic complex above the deeper-seated porphyry. If alternation occurs in carbonate-rich rocks, then unusual skarn mineralisation can also develop.
As with almost all ore deposit types porphyry targets need to be drilled eventually to quantitatively determine actual copper, gold and molybdenum values in the identified mineralization. I'll talk more in detail about drilling and the drill techniques in a later course.
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 …
Porphyry Copper Deposits This text is based mostly on the Economic Geology Notes by Ron Morton and the review of porphyry-copper deposits by Sillitoe (2010). The latter publication is exhaustive and is available through the ThULB in Jena.
Amarc is advancing three -owned IKE, DUKE and JOY porphyry copper deposit projects located in different, prolific porphyry districts in southern, central and northern BC, respectively.
Mutschler et al., 1981; Wallace, 1991. Because some porphyry Mo deposits contain significant W, the few papers that document Mo-W and W porphyry deposits are also provided in this subsection. Breccias associated with porphyry copper deposits have been a …
Porphyry copper definition is - a large low-grade disseminated copper deposit. a large low-grade disseminated copper deposit… See the full definition. SINCE 1828. Menu. JOIN MWU ... porphyry copper. porphyry shell. Porpita. porpoise. Statistics for porphyry copper. Look-up Popularity.
Porphyry copper deposits are generally composed of a "plug-like" igneous intrusion – a large magma body that is emplaced beneath a volcanic system. On average these deposits can have a vertical and horizontal extent of 1-2 km and can range from tens of millions to a billion+ tons in size.
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 . Inquiry; How Copper deposits are formed - Australian Mines Atlas.
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.
A third copper source includes copper of breccia pipes of the Breccia Pipe Province of northern Arizona. Porphyry Copper Deposits. Most of the copper mined in Arizona comes from porphyry copper deposits. These are copper ore deposits associated with intrusive igneous rocks similar to granite.
Although copper has been mined from a number of different types of mineral deposits, porphyry copper deposits are the most important source for copper, accounting for more than 60 percent of the annual world copper production and approximately 65 percent of the known total copper resource.
to many porphyry copper deposits (for example, Bingham, Utah), as well as crosscutting porphyry-style mineralization (for example, Valea Morii, Romania). Primary Commodities Copper is the primary commodity of economic interest in most porphyry copper deposits, although some deposits with low
Porphyry deposits may also host valuable by-products, including platinum, palladium, and tungsten.Approximately 50-60 percent of the world's copper, and …
Porphyry copper deposits in the American southwest comprise a distinctive and important metal resource. Their exploration and exploitation during the past hundred years was accompanied by significant advances in geological knowl ...
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 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.
The term porphyry is also used for a mineral deposit called a "copper porphyry". The different stages of cooling that create porphyritic textures in intrusive and hypabyssal porphyritic rocks also lead to a separation of dissolved metals into distinct zones.
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.
Copper mineralization occurs in many forms, and in a variety of geological settings.As such, there are various factors to consider when determining the value of different types of copper deposits.
Comments: Except for Ag grade, all grades from Chitalin and others (2011), with 0.4% Cu equivalent cut-off. Based on geophysical data, hydrothermal alteration and …
Porphyry deposits are one of the most important sources of copper and molybdenum, and are also major sources of silver, gold, and tin.In addition, porphyry deposits may host valuable by-products ...