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Porphyry copper deposit - Wikipedia

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 …

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Geology of Porphyry Copper Deposits - 911metallurgist

Porphyry deposits and IOCG’s are the world’s primary source of copper and they account for more than 60% of the copper production globally but in addition to copper they also supply 100% of the world’s molybdenum production, 10 to 15% of global uranium production and a significant proportion of the world’s gold production in short they make up a critical group of deposits

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Porphyry copper deposit | mineralogy | Britannica

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 deposits constitute important sources because they may be worked on a large scale at low cost

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Porphyry Deposits: The World's Largest Source of Copper

Porphyry Copper deposits play an important role in the global economy These deposits provide over 60% of the world’s copper and include other important metals such as molybdenum, gold and silver Porphyry copper deposits are known for their low grades and very high tonnage

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Porphyry Copper Deposits | Geology for Investors

Porphyry copper deposits are typically very-low grade with between 04 and 1% copper The main mineral is chalcopyrite, which is finely disseminated through the host porphyritic rocks The main mineral is chalcopyrite, which is finely disseminated through the host porphyritic rocks

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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

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Porphyry Copper Deposit Model - pubsusgsgov

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

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(PDF) The formation of porphyry copper deposits

In the Iju deposit, a small porphyry copper deposit, the oceanic slab was slightly hydrated and minor water was released at the depth of 110–130 Km A small volume of magma was formed due to

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Preliminary Model of Porphyry Copper Deposits

The median size of the longest axis of alteration surrounding a porphyry copper deposit is 4–5 km, while the median size area of alteration is 7–8 km2 (table 2) Vertical Extent The vertical extent of ore is dependent upon the lower copper cutoff grade, which will vary with the …

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Porphyry (geology) - Wikipedia

Porphyry deposits are formed when a column of rising magma is cooled in two stages In the first stage, the magma is cooled slowly deep in the crust, creating the large crystal grains with a …

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Porphyry copper deposit - Wikipedia

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 …

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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

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PORPHYRY DEPOSITS - Earth science

Porphyry copper deposits comprise three broad types: plutonic, volcanic, and those we will call "classic" 1 Plutonic porphyry copper deposits occur in batholithic settings with mineralization principally occurring in one or more phases of plutonic host rock

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Porphyry copper deposits: Strike-slip faulting and

Porphyry copper deposits sometimes form during the solidification of stocks of relatively oxidized magma of intermediate composition Most workers have assumed ore-forming systems have special chemical attributes, but none has been found that is useful to guide exploration efforts

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What is a Porphyry Copper Deposit? - arizonageologicalsocorg

Porphyry copper deposits are also important sources for other metals, including molybdenum, gold and silver Minor amounts of rhenium, tellurium, arsenic, zinc and platinum group elements are also present in elevated concentrations within these systems and are recovered at some mining operations

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What Makes for a Copper Porphyry Takeover Target

Copper porphyry deposits are responsible for 75 percent of the world’s copper production, 50 percent of molybdenum production and 20 percent of gold production These polymetallic powerhouses also account for significant production of rhenium, silver, lead, tellurium, selenium, bismuth and zinc

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(PDF) The formation of porphyry copper deposits

Porphyry copper deposits in the Tethyan metallogenic belt broadly occur in early Mesozoic, late Mesozoic, Paleogene, and Neogene within a wide range of tectonic setting

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Exploration of Porphyry Copper Deposits

Exploration of Porphyry Copper Deposits Delineation of the alteration can be done in several ways, obviously if the alteration outcrops straightforward field mapping will identify the telltale alteration minerals; chlorides, calcite and epidote of prophylactic alteration, quartz, sericite and pyrite or folic alteration and potassium feldspar,

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Porphyry copper deposits in China - researchgatenet

The Ulan Uzhur copper deposit, situated on the western margin of the Qaidam basin is a porphyry copper deposit controlled by granite porphyry dikes

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Bor, Porphyry copper deposit - USGS

Comments: Tonnage includes production and resource of porphyry (600 Mt) and high-sulfidation (200 Mt) ores (Armstrong and others, 2005) In concentrate: 19 ppb Pt, 40 ppb Pd

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Porphyry copper deposits of the world: database, maps, and

The foundation of mineral deposit models is information about known deposits—the purpose of this publication is to make this kind of information available in digital form for a group of porphyry copper deposits This publication contains a computer file of information on porphyry copper deposits around the …

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Everything You Need to Know About Copper Porphyries

Mar 11, 2015 · 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

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Gold in porphyry copper deposits: its abundance and fate

Gold abundances in porphyry copper deposits vary greatly, complicating efforts to define gold-rich porphyry copper deposits The original definition was based on the Au/Mo ratios of porphyry copper deposits with no reference to their copper content , and resulted in the suggestion that gold-rich deposits were found largely in island arc regions (Kesler, 1973)

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22 Porphyry-epithermal mineral system | Geoscience Australia

In the porphyry-epithermal mineral system, pathways for fluids and their contained metals, ligands and sulfur include faults, stratigraphic aquifers and crystallising intrusive bodies Crystallising intrusions are particularly important pathways for high-temperature, proximal deposits such as porphyry Cu-Au-Mo deposits and Cu-rich skarns

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Porphyry copper deposits: Strike-slip faulting and

Porphyry copper deposits sometimes form during the solidification of stocks of relatively oxidized magma of intermediate composition Most workers have assumed ore-forming systems have special chemical attributes, but none has been found that is useful to guide exploration efforts

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Porphyry copper deposit - IPFS is the Distributed Web

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 …

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Porphyry Copper Deposits | Historical Perspectives of

Differences among porphyry copper deposits may in many cases reflect differences in timing and extent of interaction with meteoric water and the deposits’ postmineral histories There is probably more than one tectonic mechanism capable of generating porphyry copper magmas of variable compositions

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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 Weathering processes, which accompany uplift and erosion, …

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Porphyry Copper Flashcards | Quizlet

What are the characteristics of a Porphyry Copper deposit? Very large, low grade, deposits, that are associated with intermediate to acidic plutonic intrusives They are characterized by intense and extensive hydrothermal alteration of the host rocks

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Porphyry - an overview | ScienceDirect Topics

There are several large porphyry copper deposits in the world: Chuquicamata (690 Mt @ 258% Cu), Escondida, and El Salvador, Chile, Toquepala, Peru, Lavender Pit, Arizona, and Malanjkhand (145 Mt …

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Porphyry copper deposit density - pubserusgsgov

Porphyry copper deposit densities vary from 2 to 128 deposits per 100,000 km 2 of exposed permissive rock, and the density histogram is skewed to high values Ninety percent of the control areas have densities of four or more deposits, 50 percent have densities of 15 or more deposits, and 10 percent have densities of 35 or more deposits per 100,000 km 2

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Porphyry Copper, Gold, and Molybdenum Deposits: Preface

Porphyry deposits are the world’s principal resources of Cu, Mo, and Re, and are major resources of Au and Ag Since 1905, more than 700 articles concerning porphyry deposits have been

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Anatomy of Porphyry-Related Mineralised Au-Cu-Ag-Mo …

have facilitated an understanding of the implications to explorationists of the anatomy of porphyry related Au-Cu-Mo-Ag mineralising systems Deeply eroded magmatic source rocks tend to host sub economic mineralisation, which may become focused in the highly prospective in overlying apophyses to spine-like polyphasal intrusions

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Porphyry Copper Deposits of the American Cordillera

figures summarized for 45 porphyry copper deposits in the United States by Titley and Beane (1981) are 158 billion tons of copper ore production and reserves with a weighted copper grade of 068 percent Fourteen deposits that reported molybde­ num had a weighted grade of 00325 percent molybdenum Literature and the Growth of Knowledge

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Porphyry (geology) - Wikipedia

Porphyry copperEdit This process, which occurs primarily when fluids are driven off the cooling magma, is one of the main reasons for the existence in the world of rich, localized metal ore deposits such as those of gold, copper, molybdenum, lead, tin, zinc, rhenium and …

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Geochronology of the porphyry copper deposits and related

K–Ar dating demonstrates that all but eight of 41 dated porphyry copper and related ore deposits of Mexico were emplaced during the Laramide episode of maximum plate convergence One older deposit is related to the Jurassic volcanic arc of western North America, one is pre-Laramide Cretaceous

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The 10 biggest copper mines in the world

Nov 04, 2013 · The porphyry copper deposit was discovered in 1952 and has been operational since 1998 It is the first mine to be developed entirely by the state-owned Codelco and produced 427,791t of copper and molybdenum in 2012 Construction work for the Radomiro Tomic Copper Sulphide Mine – Phase I was completed in June 2010 with an investment of $370m

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Porphyry copper deposits of the world: database, maps, and

The foundation of mineral deposit models is information about known deposits—the purpose of this publication is to make this kind of information available in digital form for a group of porphyry copper deposits This publication contains a computer file of information on porphyry copper deposits around the …

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