porphyry copper deposits ore

Porphyry copper deposits Strike

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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Triggers for the formation of porphyry ore deposits in ,

Oct 13, 2013 0183 32 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 zon However, generation of ....

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Preliminary Model of Porphyry Copper Deposits

The general attributes of porphyry copper deposits are summarized below Brief Description In hypogene parts of porphyry copper deposits, the copper occurs predominantly in chalcopyrite other important copper ore minerals may include bornite and enargite Ore minerals occur as disseminations and in stockworks of veins in hydrother-...

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Erdenet, Porphyry copper deposit

Comments Grade and tonnage data from Singer and others 2008 Mineralization at depth between the known, but undeveloped Erdenet Central and Erdenet SE orebodies, along with drill results on the NW margins of the existing mine, demonstrate there is nearly continuous mineralization extending gt 10 km along a NW-SE trend...

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Porphyry Copper Flashcards Quizlet

Can porphyry copper deposits be located within the host rock, country rock or both? Both If the ore is spread-out at different grades through the entire deposit is it then not fracture controlled? No , precipitation of porphyry ore on cooling...

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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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PORPHYRY DEPOSITS

The 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, intrusion-related deposits ,...

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PDF Distribution of gold in porphyry copper deposits

PDF Analysis of 55 porphyry copper deposits demonstrates a continuum between porphyry copper-gold deposits emplaced at a median depth of 1 km, with a median size of 160 million metric tons of ....

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Uses of Copper Supply, Demand, Production, Resources

In porphyry copper deposits, copper ore minerals are disseminated in igneous intrusions Sediment-hosted stratabound copper deposits, in which copper is concentrated in layers in sedimentary rocks, account for about 20 percent of the world s identified copper resourc Globally, mines in these two deposit types produce about 12 million tons of ....

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How to Locate Copper Deposits Sciencing

Geologists employ many techniques to locate copper deposits, from testing the components of ore to studying land features to determine probable locations for a copper deposit The process is not as easy as it once was, in part because environmental regulations prevent exploratory digs deep in ,...

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Porphyry Copper Gold Ore

This is an ore from a zone of Copper Porphyry which was located in southeastern New Brunswick The overall grade of the ore was assayed at 35 copper and 600ppb AU or gold This deposit is actually a project which myself and another prospector have been looking at over the last year...

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Porphyry Copper Deposit Model

Sep 02, 2010 0183 32 Summary of Porphyry Copper Deposit Model A Introduction B Deposit Type and Associated Commoditi C History of Porphyry Copper Deposits D Regional Environment E Physical Description of Deposits F Geophysical Characteristics G Hypogene Ore Characteristics H and K Hypogene and Supergene Gangue Characteristics I Hydrothermal ....

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What is a Porphyry Copper Deposit? by David F Briggs on ,

porphyry copper deposits were the first type of metallic mineral deposit to be exploited by large- scale, bulk tonnage, open pit mining methods Economies of scale and advances in technology have...

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Mineral deposit

Porphyry copper deposits and their close relatives, porphyry molybdenum deposits contain disseminated mineralization, meaning that a large volume of shattered rock contains a ramifying network of tiny quartz veins, spaced only a few centimetres apart, in which grains of the copper ore minerals chalcopyrite and bornite or the molybdenum ore ....

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Porphyry copper deposit

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 name In later stages, circulating meteoric fluids may interact with the magmatic ....

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Porphyry Copper Deposits of the American Cordillera

ores with subaerial andesitic volcanic activity and the affinity of ores with felsic intrusive porphyry centers link porphyry copper deposits with specific geologic settings which have undergone the effects of plate convergence, most commonly along conti 173 nental ,...

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King Copper AZGS

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...

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PDF The formation of porphyry copper deposits

The formation of porphyry copper deposits , Many researchers have studied the oxidation states of porphyry Cu 177 Mo 177 Au ore deposits and found that in a given region the parental magmas of ....

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What is a Porphyry Copper Deposit?

bodies are very large, generally containing from 100 million to several billion tons of copper ore with a copper content of 02 to 20 The majority of porphyry copper deposits occur adjacent to subduction zones ie Ring of Fire around the Pacific Ocean , which form along continental margins ie Andes Mountains and island...

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Copper Porphyry Deposits Flashcards Quizlet

Where is the main ore zone in a copper porphyry deposit? In a sheath zone around the central zone What non-economic mineral is found in a shell around the main ore body? Pyrite - contaminated with sulphide What are the main ores of a copper porphyry deposit?...

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porphyry copper deposits

Aug 29, 2016 0183 32 Regional Characteristics of Porphyry Copper Deposits of the Abstract , Chairman of Goldcliff Resource Corporation reports that Goldcliff has made the first significant porphyry copper ore grade ....

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Porphyry copper deposit Project Gutenberg Self ,

Porphyry copper deposit Porphyry copper deposits are copper orebodies that are formed from hydrothermal flu, World Heritage Encyclopedia, the aggregation of the largest online encyclopedias available, and the most definitive collection ever assembled...

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Porphyry copper deposit

If you take into account the probable cut off you can see how small the margins are porphyry deposits are very sensitive to metal pric These examples are some of the cadillacs of the ore deposit worlds but other lower grade porphyry deposits can become uneconomic with just a 20 drop in copper price...

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Types of Copper Deposits in the World Investing News Network

Most types of copper deposits also have secondary ores, however, and they can add a great deal of value to a deposit The Escondida mine is primarily a chalcopyrite porphyry deposit overlain by ....

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Grasberg, Porphyry copper deposit

Potter, D, 1996, What makes the Grasberg anomalous, implications for future exploration, in Porphyry related copper and gold deposits of the Asia Pacific region Conference Proceedings, Australian Mineral Foundation, Glenside, South Australia, p 101 1013...

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A Plate Tectonic Model for the Origin of Porphyry Copper ,

space-time distribution of porphyry copper and porphyry molybdenum deposits Porphyry ore deposits, occurring in the western Americas, southwest Pacific and Alpide orogenic belts, are thought to constitute a normal facet of calc-alkaline magma- tism Chemical and isotopic data cited are consistent with the generation of the com-...

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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 has been fractured on a fine scale and through which chalcopyrite and other copper minerals are disseminatedPorphyry 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 ....

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Giant Porphyry Deposits Characteristics, Distribution ,

More than half of the 25 largest known porphyry copper deposits, defined in terms of contained copper metal, formed during three time periods the Paleocene to Eocene, Eocene to Oligocene, and middle Miocene to Pliocene These giant deposits are clustered within three provinces, central Chile, northern Chile, and southwest Arizona-northern Mexico...

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Porphyry copper deposit

Porphyry-type ore deposits for metals other than copper Copper is not the only metal that occurs in porphyry deposits There are also porphyry ore deposits mined primarily for molybdenum, many of which contain very little copper...

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ORE DEPOSITS 101

Jul 07, 2017 0183 32 ORE DEPOSITS 101 - Part 3 - Porphyries, Skarns IOCG SprottEDU , Finding Something Unexpected in an Abandoned Copper Mine - Duration 14 48...

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