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porphyry copper deposits

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Porphyry copper deposit | mineralogy | Britannica Porphyry copper deposit, large body of rock, typically a porphyry of granitic to dioritic composition, that h

porphyry copper deposits

  • 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 minerals21102020· 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 areBasics Of Copper Porphyry Deposits For Investors |Porphyry Copper Deposits are the largest source of Cu/Mo/AuGeology of Porphyry Copper Deposits

  • How to make porphyry copper deposits ScienceDirect

    01012020· 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)23072013· Porphyry copper deposits are typically verylow grade with between 04 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 lowcost mining settingPorphyry Copper Deposits | Geology for InvestorsThe major products from porphyry copper deposits are copper and molybdenum or copper and gold The term porphyry copper now includes engineering as well as geological considerations; It refers to large, relatively low grade, epigenetic, intrusionrelatedPORPHYRY DEPOSITS Earth Science

  • Gold in porphyry copper deposits: its abundance and

    01102002· 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 crustPorphyry copper deposits form in continental magmatic arcs along convergent platemargin boundaries or in islandarc environments The deposits are associated with subductionrelated volcanic centers, although in some examples, they are thought to be associated with postcollisional volcanismPreliminary Model of Porphyry Copper DepositsPorphyry copper 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 from meteoric surface waters Epithermal deposits form at depths ofPorphyr Copper • GeoLearning • Department of Earth

  • 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: porcukml (uncompressed 12M bytes) porcuporphyry copper deposits were the first type of metallic mineral deposit to be exploited by largescale, 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 Bingham Canyon, Salt Lake County, Utah (Photo taken by Ken Krahulec, July 2005) Over the last centuryWhat is a Porphyry Copper Deposit?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 copperbearing sulfidesPreliminary Model of Porphyry Copper Deposits

  • Porphyry Copper Deposits project: Introductory video

    Meet the team involved in the research PCD project Follow us on: twitter: @bristolpcd wwwbristolpcdPorphyry 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(PDF) The formation of porphyry copper depositsPorphyry Copper Deposits of the World: Database and Grade and Tonnage Models, 2008 By Donald A Singer, Vladimir I Berger, and Barry C Moring 2008 Tonnage of porphyry copper deposits versus average copper grades (from figure 1) This report is an update of earlier publications about porphyry copper deposits (Singer, Berger, and Moring, 2002; Singer, DA, Berger, VI, and Moring, BCPorphyry Copper Deposits of the World: Database and

  • Porphyry Copper Systems* University of Utah

    Porphyry Copper Systems* lithocaps above porphyry Cu deposits, where massive sulfide lodes tend to develop in deeper feeder structures and Au ± Agrich, disseminated deposits within the uppermost 500 m or so Less commonly, intermediatesulfidation epithermal mineralization, chiefly veins, may develop on the peripheries of the lithocaps The alterationmineralization in the porphyry CuThe 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 This process, which occurs primarily when fluids are driven off the cooling magma, is one of the main reasons for the existence in thePorphyry (geology) WikipediaWhen 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 easymining large volumes make up for the low grades, typically between 03 per cent to 1 per cent copper equivalent But these []Explainer: Why are so many explorers chasing a porphyry

  • Porphyry Copper Deposits | SeventyFifth Anniversary

    Examination of mineral stability diagrams in view of the spatial and temporal relationships among hydrothermal minerals in the porphyry copper deposits indicates that with time, fluids within these systems produce alteration compatible with decreasing temperatures orLong, KR, 1995, Production and reserves of Cordilleran (Alaska to Chile) porphyry copper deposits, in Pierce, FW, and Bolm, JG, eds, Porphyry copper deposits of the American Cordillera: Tucson, Arizona Geological Society Digest 20, p 35–68Safford, Porphyry copper deposit USGSAntonio Arribas, Toshio Mizuta, Potential for Porphyry Copper Deposits in Northern Tōhoku (or the Exploration Potential for Base and Precious Metal Deposits in Japan 2020), Resource Geology, 101111/rge12167, 68, 2, (144163), (2018)Why No Porphyry Copper Deposits in Japan and South

  • (PDF) Porphyry copper deposits of the American

    Porphyry copper deposits of the American CordilleraPorphyry copper deposits are formed by aqueous fluids exsolved by differentiated, mantlederived magmas variably mixed with crustal meltsHow Much Water in Basaltic Melts Parental to PorphyryWhen 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 easymining large volumes make up for the low grades, typically between 03 per cent to 1 per cent copper equivalentExplainer: Why are so many explorers chasing a porphyry

  • The geological characteristics, geochemical signature and

    Porphyry copper deposits are large (commonly hundreds to thousands of million tonnes) and low to medium in grade (03 to 15% copper) The majority of goldrich porphyry deposits occur in the circumPacific and commonly contain 03 to 16 g/t goldPorphyry copper mineral deposits are usually massive, with extraction taking place by openpit mining Copperbearing sedimentary rocks are the second most important type of copper deposit,Types of Copper Deposits in the World | An Investor'sSo how do we explore for Porphyry Copper Deposits which are completely covered by barren younger rocks? Well let’s back up a bit, we know that porphyries form under large subduction related volcanoes and that most of these are located under the ring of fire around the subducting pacific plate another fertile subduction zone occurs in Balkans, Turkey, Iran and Pakistan So this gives us aExploration of Porphyry Copper Deposits

  • Porphyry Copper Systems* University of Utah

    Typical hypogene porphyry Cu de posits have average grades of 05 to 15 percent Cu, <001 to 004 percent Mo, and 00× to 15 g/t Au, although a few “Au only” deposits have Au tenors of 09 to 15 g/t but little Cu (<01 %) The Cu and, in places, Au contents of skarns are typically higher still