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porphyry copper deposits

  • Rutile and apatite: Useful prospecting guides for porphyry ...

    The accessory minerals rutile and apatite have been studied in 77 known porphyry copper deposits. Their value as indicators has been well established on the basis of specific chemical and paragenetic variations which they show. Rutile occurs as the only Ti-mineral in the quartz-sericite zone, is dominant in the biotite-orthoclase zone, and is ...

  • What Makes for a Copper Porphyry Takeover Target

    Porphyry deposits can be divided into three main subtypes: molybdenum porphyry, gold porphyry and copper porphyry. The world's most important sources for copper today are copper porphyry ...

  • (PPT) Supergene Mineralisation in Porphyry Cu Deposit ...

    Ref: Porphyry Copper Deposit Model By David A. John, editor, Scientific Investigations Report 2010–5070–B, U.S. Geological Survey • The Porphyry Copper Deposit emplaced in continental margin environments possess a capping of Supergene Alteration & Enrichment overlying the Hypogene sulphide mineralisation • Minerals formed from ...

  • Porphyry copper and related occurrences in Nevada [MAP AND ...

    The locations of 88 porphyry and related copper and molybdenum occurrences are shown on a 1:1,000,000-scale topographic base map of Nevada. In addition to porphyry copper the map includes copper skarn deposits, copper-bearing high-level alteration …

  • Porphyry Copper - Aurania Resources

    Porphyry deposits produce approximately 60% of the world's copper. Most of these deposits lie in the Pacific Rim, also known as the Ring of Fire, an arc that stretches from Papua New Guinea to the southern tip of Chile. The copper is contained within roughly cylindrical granitic bodies that are remnants of the magma core beneath volcanoes.

  • Preliminary Model of Porphyry Copper Deposits

    Copper skarn deposits occur near many porphyry copper host intru- sions that intruded carbonate-bearing units (Einaudi and others, 1981), and skarn mineral zoning patterns may be useful in the targeting of a potentially associated porphyry copper deposit (Meinert and others, 2005).

  • Porphyry copper deposits - SlideShare

    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 ...

  • Looking for Copper- How are Porphyry Deposits formed ...

    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.

  • Exploration of Porphyry Copper Deposits

    So 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 …

  • Geology of the Josemaría Porphyry Copper-Gold Deposit ...

    Many porphyry copper deposits in the central Andes were formed during uplift resulting from the crustal shortening and thickening that accompanied compressive tectonism (e.g., Maksaev and Zentilli, 1999; Perelló et al., 2003b; Sillitoe and Perelló, 2005; Maksaev et al., 2009) and, as a consequence, are likely to have been rapidly exhumed ...

  • By-products of porphyry copper and molybdenum deposits ...

    Porphyry Cu and porphyry Mo deposits are large to giant deposits ranging up to >20 and 1.6 Gt of ore, respectively, that supply about 60 and 95% of the world's copper and molybdenum, as well as significant amounts of gold and silver. These deposits form from hydrothermal systems that affect 10s to >100 km 3 of the upper crust and result in ...

  • A Plate Tectonic Model for the Origin of Porphyry Copper ...

    The theory of lithosphere plate tectonics, embodying the concepts of sea-floor spreading, transform faulting, and underthrusting at continental margins and island arcs, is employed as a basis for an actualistic, though speculative, model for the origin and space-time distribution of porphyry copper and porphyry molybdenum deposits.Porphyry ore deposits, occurring in the western Americas ...

  • Geology of Porphyry Copper Deposits

    Porphyry copper deposits ppt. Here let's understand the geology of porphyries and iron oxide copper gold deposits or IOCG as they are known. These are somewhat the giants of the ore deposits world. As a mining interested learner, the geology of porphyry copper deposits is vital to your education.. Now in the first Exploration Geology Course I discussed how because our current …

  • Porphyry Deposits: General characteristics and modeling ...

    Porphyry Copper-Gold Deposits . Oyu Tolgoi: 2,467 Mt @ 0.68 wt % Cu, 0.32 g/t Au, (790 t Au) Batu Hijau: 1,644 Mt @ 0.44 wt % Cu, 0.35 g/t Au, (572 t Au) Frieda River: 1,103 Mt @ 0.61 wt % Cu, 0.32 g/t Au, (354 t Au) Porphyry Cu-Mo Deposits . El Teniente: 12,482 Mt @ 0.63 wt % Cu, 0.02 wt % Mo, 0.035 g/t Au, (437 t Au)

  • Everything You Need to Know About Copper Porphyries ...

    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 …

  • Bubbling Magma Chambers, Cupolas, and Porphyry Copper Deposits

    Porphyry copper deposits of common size can form during the solidification of large stocks. Super-giant porphyry copper deposits can form where the saturation front propagates from a stock into an underlying batholithic chamber with a magma volume on the order of 1000 km 3 and a top at depths of 10 to 15 km.

  • The Great Porphyry Copper Deposits of Arizona | Geology ...

    The porphyry copper deposits of Arizona are located in what is known as the 'basin and range' physiographic province. This region is characterized by a series of fault bound blocks that have risen and fallen creating a distinctive valley-mountain range topography. Critically as this landscape formed, the rocks not only moved up and down ...

  • Porphyry Deposits | PDF | Geology | Economic Geology

    Porphyry Deposits. The Importance of Porphyry Deposits as a Copper and Gold Resource Gold Resources. Copper Resources A Geological Cross Section through the Batu Hijau Porphyry Deposit, Indonesia (920 million tons of ore grading 0.55 wt.% Cu, 0.42 g/t Au) Batu Hijau Porphyry Cu-Au Deposit, Indonesia Batu Hijau Porphyry Cu-Au Ores Hypogene ...

  • Geological setting for porphyry copper deposits in calc ...

    The Wadi Rofaiyed deposits have many similarities to the worldwide quartz diorite-hosted porphyry copper deposits. It is a part of Katerina Ring Complex, which represents Ediacaran post-collisional magmatic cycle that has taken place during the last geological period of …

  • Porphyry copper deposit - Wikipedia

    Porphyry copper deposits are copper ore bodies 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 name. In later stages, circulating meteoric fluids may interact with the magmatic ...

  • 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 ...

  • Porphyry Copper Systems*

    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 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. Despite relatively low grades (average 0.44 percent copper in 2008), PCDs have significant economic and societal impacts ...

  • Explainer: Why are so many explorers chasing a porphyry ...

    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 […]

  • How to make porphyry copper deposits - ScienceDirect

    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 ...

  • New Mexico Geological Society

    smaller porphyry copper deposits (although not all of the deposits discussed here have been dated). This paper is an update of the work by North and McLemore (1986) and McLemore (2001), who summarize the various gold and silver mineral deposits, including porphyry copper deposits in the state. WHAT ARE PORPHYRY COPPER DEPOSITS?

  • (PDF) Porphyry and Skarn Cu-Au Deposits and its Associated ...

    undeveloped porphyry deposits do not Each of these 3 major deposits would be extended to the surface, but are blind deposits. recognized as super giants or elephant-size These include the Lembah Tembaga porphyry deposits, when compared to other porphyry (as part of residual resource, 2005 53 million and skarn deposits around the world from the ...

  • Porphyry Deposits: The World's Largest Source of Copper ...

    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 …

  • King Copper | AZGS

    Porphyry copper deposits commonly yield molybdenum and silver as co-products, were. The intrusive activity responsible for Arizona's porphyry copper deposits occurred about 70 million years ago, in the Earth's crust deep below the ground surface. The rich metal deposits were subsequently exposed millions of years later by faulting and erosion.

  • Porphyry Copper Deposits of the American Cordillera

    A tabulation of grade and tonnage of porphyry copper ores of the region has been published by Gilmour (1982) and sum­ marized by Titley and Anthony (1989) and Titley (1994). Re­ serves in 1989 have been listed by Beard (1989). Production figures summarized for 45 porphyry copper deposits in the

  • (PDF) Porphyry deposits - ResearchGate

    porphyry copper deposits, such as Bingham and Bajo de la Alumbrera, sulphide deposition was primarily due to cooling of metal-rich, saline brines below 400ºC (Ulrich et al., 2001;