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Triggers For The Formation Of Porphyry Ore Deposits In

Although porphyry deposits are associated with arc volcanism, they are not the typical products in that environment.It is believed that tectonic change acts as a trigger for porphyry formation. [7] There are five key factors that can give rise to porphyry development: 1) compression impeding magma ascent through crust, 2) a resultant larger shallow magma chamber, 3) enhanced fractionation of ...

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Porphyry Deposits 101 – Doubleview Gold Corp.

Although porphyry deposits are associated with arc volcanism, they are not the typical products in that environment.It is believed that tectonic change acts as a trigger for porphyry formation. [7] There are five key factors that can give rise to porphyry development: 1) compression impeding magma ascent through crust, 2) a resultant larger shallow magma chamber, 3) enhanced fractionation of ...

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The Formation Of The Panguna Porphyry Copper Deposit ...

Ore localisation. TABLE OF CONTENTS Morphology and environment. Relative metal abundances. Composition of intrusive rocks. Classifications based on multiple criteria. Summary. CLASSIFICATION OF PORPHYRY COPPER DEPOSITS OF THE SOUTHWEST PACIFIC GENETIC ASPECTS: THE ROLE OF FLUIDS IN PORPHYRY COPPER FORMATION Models of fluid interaction.

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Ore Deposit Models – 1. Porphyry Copper Deposits ...

Copper-zinc albite porphyry in the Hersai porphyry copper deposit, East Junggar, China: A transition between late magmatic and hydrothermal porphyry copper deposit X. Xu , Q. Mao , +6 authors L. Dong

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What Is A Porphyry Copper Deposit?

The majority of porphyry copper deposits occur adjacent to subduction zones (i.e. Ring of Fire around the Pacific Ocean), which form along continental margins (i.e. Andes Mountains) and island arcs (i.e. Aleutian Islands). Distribution of World's Porphyry Copper Deposits (Modified from Singer et. al., 2008).

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Porphyry Copper Systems*

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-hosted Au deposits in increasingly peripheral locations; and superjacent high- and intermediate-sulfidation epi-thermal deposits.

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1 Introduction

porphyry deposit formation. This cartoon could be analogous to the SE Pacific rim in a section line from the subducting Nasca plate through the east dipping subduction zone below Chile and the Andes magmatic arc, to the Deseado Massif back arc in Argentine Patagonia. Figure 1.4 Ore systems within subduction-related magmatic arc and back arc ...

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Sulfur Radical Species Form Gold Deposits On Earth Pnas

Nov 03, 2015· More generally, any mechanism that triggers ore deposition in different geological settings, such as fluid cooling, decompression and phase separation, interaction with rocks (e.g., sulfidation), ... (2013) Triggers for the formation of porphyry ore deposits in magmatic arcs.

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(Pdf) Triggers For The Formation Of Porphyry Ore Deposits ...

Triggers for the formation of porphyry ore deposits in magmatic arcs. October 2013 ... Porphyry ore deposits typically form in convergent plate margin or postsubduction settings at depths of 1-6 ...

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Triggers For The Formation Of Porphyry Ore Deposits In ...

Nov 01, 2013· 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. However, generation of the largest deposits is often restricted to specific arc segments and limited periods of time. Here, I outline a hierarchy of four key triggers that may be involved in the formation of large porphyry ...

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Triggers For The Formation Of Porphyry Ore Deposits In ...

Porphyry ore typically forms in magmatic arcs above subduction zones. However, generation of the largest deposits is often restricted to specific arc segments and limited periods of time. Here, I outline a hierarchy of four key triggers that may be involved in the formation of large porphyry deposits.

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The Formation Of Porphyry Copper Deposits Springerlink

Wilkinson JJ (2013) Triggers for the formation of porphyry ore deposits in magmatic arcs. Nat Geosci 6:917–925. doi: 10.1038/Ngeo1940 Article Google Scholar

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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 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 ...

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Magmatic Ore Deposits

Porphyry Copper Deposits Porphyry copper (pCu) deposits are large, low grade copper deposits, which sometimes contain minor Mo, Ag, and Au. Ore grade is gene rally around 0.5 % Cu. Almost all known porphyry copper deposits are Tertiary in age. They are thought to have formed

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Basics Of Copper Porphyry Deposits For Investors – Classic ...

Oct 20, 2020· As a result of this dynamic, copper porphyry deposit kind of looks like a tooth diagram. What you see in a copper porphyry deposit is the ore body and three alterations (potassic, phyllic, and propylitic). As the hydrothermal fluid travels away from the center, it alters the rock differently.

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Key Words: Epithermal Au Porphyry Cu

Triggers for intrusion emplacement and hydrothermal fluid evolution ORE FLUIDS Epithermal-porphyry ore systems host metals concentrated by subduction-related magmatic arc processes within mostly compressional collision settings, grading into more extensional back arc environments for some epithermal deposits.

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The Formation Of Porphyry Copper Deposits Chinese …

Nov 05, 2016· Triggers for the formation of porphyry ore deposits in magmatic arcs Wilkinson, JJ High oxygen fugacity and slab melting linked to Cu mineralization: evidence from Dexing Porphyry copper deposits, Southeastern China

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Epithermal Gold

conditions active during ore formation. A model is proposed that transient changes in the nature of convergence provide triggers for the emplacement of intrusions along with vein and breccia ores derived from deeper magmatic source rocks. Breccias which occur in most epithermal-porphyry deposits are

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Porphyry Copper Deposits In The ...

Dec 16, 2011· Molybdenum Porphyry Deposits . The porphyry copper mine Bingham Canyon in Utah, USA . Mineable porphyry deposits have an enormous size of some hundred million tons of extractable ores with an average mineralization that can be as low-grade as 0.2% to >1% copper, 0.005 to 0.03% molybdenum and/or 0.4 to 2 g/t gold.

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How Ore Deposits Are Formed?

The ore deposit has a typical, well-defined shape that resembles the cap of a mushroom. Its “stem” is the volcanic vent, which has solidified into porphyry and then cracked to form numerous veins through which the fluid pushed its way upwards.

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The Characteristics Of Rees Zr And Hf In Ore

Pulang porphyry Cu deposit situated in southwestern China (Liu et al., 2013), and the Baogutu porphyry Cu deposit located in northwestern China (Cao et al., 2014). Therefore, in addition to oxygen fugacity, there are other factors that control the formation of por-phyry Cu deposits, especially for the porphyry Cu deposits with a low oxygen ...

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