porphyry cocrusher gold deposits
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porphyry cocrusher gold deposits

Gold in porphyry copper deposits: its abundance and fate ...

01/10/2002  Definition of porphyry copper–gold deposits should be based on both copper and gold grades for several reasons. Definitions based solely on gold grades are highly dependent on the price of gold and thus likely to require periodic revision. Also, mineable porphyry copper deposits are the high-grade extension of a larger population of Cu–Au geochemical anomalies with grades that extend downward toward crustal average values. Gold is closely associated with copper

Gold in Porphyry Copper Deposits: Experimental ...

If gold is present in the ore-forming solutions, more of it will be deposited in high-temperature porphyry copper-gold deposits where it will be closely associated with bornite. Coexisting magnetite in these deposits should generate magnetic anomalies. Lower temperature deposits will contain less gold, which is hosted by pyrite as well as chalcopyrite, and will lack magnetic anomalies. Comparison of the amount of gold hosted by natural porphyry copper-gold

(PDF) Distribution of gold in porphyry copper deposits

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 copper ...

Porphyry Copper, Gold, and Molybdenum Deposits: Preface ...

Porphyry Copper, Gold, and Molybdenum Deposits: Preface . EDITOR: DAVID R. COOKE. CODES – The Australian Research Council’s Centre for Excellence in Ore Deposit Research, University of Tasmania, Private Bag 126, Hobart, Tasmania 7001, Australia . Porphyry deposits are the world’s principal resources of Cu, Mo, and Re, and are major

Gold in Porphyry Copper Deposits: Experimental ...

If gold is present in the ore-forming solutions, more of it will be deposited in high-temperature porphyry copper-gold deposits where it will be closely associated with bornite. Coexisting magnetite in these deposits should generate magnetic anomalies. Lower temperature deposits will contain less gold, which is hosted by pyrite as well as chalcopyrite, and will lack magnetic anomalies. Comparison of the

Gold endowments of porphyry deposits controlled by ...

14/01/2020  Porphyry copper–gold deposits are large volume, low-grade disseminations formed by precipitation of copper and gold (plus molybdenum) from fluids of magmatic origin 1.

(PDF) Distribution of gold in porphyry copper deposits

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 copper ...

Porphyry Copper, Gold, and Molybdenum Deposits: Preface ...

Porphyry Copper, Gold, and Molybdenum Deposits: Preface . EDITOR: DAVID R. COOKE. CODES – The Australian Research Council’s Centre for Excellence in Ore Deposit Research, University of Tasmania, Private Bag 126, Hobart, Tasmania 7001, Australia . Porphyry deposits are the world’s principal resources of Cu, Mo, and Re, and are major

An Archean Porphyry-Type Gold Deposit: The Côté Gold

The Archean low-grade, large-tonnage Côté Gold Au(-Cu) deposit is the first large gold deposit discovered in the Swayze greenstone belt, Ontario, Canada. The deposit is hosted by the Chester Intrusive Complex, a low-Al composite, subvolcanic intrusion composed of tonalite, quartz diorite, and diorite that was previously constrained to ca. 2741 to 2739 Ma (U-Pb zircon). Presented here is the

Geology Mineralization - Grasberg Porphyry Copper

Table of ContentsRegional GeologyGrasbergMineralization The Grasberg copper-gold orebody is contained with a young igneous complex of dioritic composition which intrudes limestones of the Tertiary New Guinea Group. Alteration is typical of porphyry copper deposits worldwide except that higher grade primary chalcopyrite with significant gold values is associated with a centrally located zone of ...

Inversion of geophysical data over a copper gold porphyry ...

The deposit lies within the Early Mesozoic Quesnel Terrane that hosts a number of Cu-Au porphyry deposits and it occurs within porphyritic monzonite stocks and adjacent volcanic rocks of the Takla group. Exten-sive knowledge about the geology and mineralization has been achieved through a major drilling program. The initial deposit

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

01/03/2020  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.

Porphyry copper deposit - Wikipedia

Porphyry deposits represent an important resource of copper; however, they are also important sources of gold and molybdenum - with porphyry deposits being the dominant source of the latter. In general, porphyry deposits are characterized by low grades of ore mineralization, a porphyritic intrusive complex that is surrounded by a vein stockwork and hydrothermal breccias . [7]

An Archean Porphyry-Type Gold Deposit: The Côté Gold

The Archean low-grade, large-tonnage Côté Gold Au(-Cu) deposit is the first large gold deposit discovered in the Swayze greenstone belt, Ontario, Canada. The deposit is hosted by the Chester Intrusive Complex, a low-Al composite, subvolcanic intrusion composed of tonalite, quartz diorite, and diorite that was previously constrained to ca. 2741 to 2739 Ma (U-Pb zircon). Presented here is the ...

Some thoughts on gold-rich porphyry copper deposits ...

Porphyry copper deposits carrying more than 0.4 gm/ton gold are briefly described from northwest Argentina, northwest Pakistan, the Intermontane belt of British Columbia, the Philippines, Sulawesi, Papua New Guinea, Sabah and Puerto Rico. Gold is normally present in potassium silicate alteration, which commonly carries an unusually high magnetite content.

Porphyry - an overview ScienceDirect Topics

Porphyry deposits are large, low- to medium-grade deposits in which primary (hypogene) ore minerals are dominantly structurally controlled and are spatially and genetically related to felsic to intermediate porphyritic intrusions (Kirkham, 1971, 1972).The main metals in a porphyry are Cu, Mo, and smaller amounts of gold, although Sn, W, and Ag can be found in some porphyry deposits (Kirkham ...

Porphyry Copper, Gold, and Molybdenum Deposits: Preface ...

Porphyry Copper, Gold, and Molybdenum Deposits: Preface . EDITOR: DAVID R. COOKE. CODES – The Australian Research Council’s Centre for Excellence in Ore Deposit Research, University of Tasmania, Private Bag 126, Hobart, Tasmania 7001, Australia . 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

DISCOVERING WORLD CLASSGOLD AND GOLD-COPPER PORPHYRY

03 THE TARGETS: NEW PROSPERITY GOLD -COPPER PORPHYRY DEPOSIT MODEL 15 EMERSON (50 km2) and GOATHORN (17.8 km2) have characteristics of New Prosperity gold-copper porphyry (7.7M oz. Au; 3.6 billion lb. Cu) JACOBITE(17.8 km2) has characteristics of Babine style porphyry deposits (Bell – 411,000 oz Au; 303,000 T Cu from 77mt ore – Noranda; Granisle –

Descriptive model of Porphyry Au - USGS

ORE CONTROLS/EXPLORATION GUIDES: Zoning of near surface hot-spring Hg-S deposits to zones of vuggy silica and advanced argillic alteration at depth hosting gold and/or silver quartz-chalcedony veins may indicate presence of porphyry gold system at depth of 0.5-1.0 km below paleosurface. Zoning may have a lateral component of 1-3 km. Ore bodies may extend upward from porphyry Cu-Au style ...

Intrusion Related Gold Deposits vs Porphyry Cu-Au

These are the sources and citations used to research Intrusion Related Gold Deposits vs Porphyry Cu-Au systems, with a focus on Archean examples. This bibliography was generated on Cite This For Me on Sunday, March 25, 2018. Journal. Beaudoin, G. and Raskevicius, T. CONSTRAINTS ON THE GENESIS OF THE ARCHEAN OXIDIZED, INTRUSION-RELATED CANADIAN MALARTIC GOLD DEPOSIT,

Drilling suggests second gold porphyry body at Los

09/10/2020  Drilling suggests second gold porphyry body at LCL’s Tesorito prospect. By Meagan Evans. Published at Oct 9, 2020, in Mining. Colombian-focused gold-copper explorer, Los Cerros Limited has provided an update on its drilling program at the Quinchia Gold Project’s Tesorito prospect in Colombia’s Mid-Cauca Belt. The company report that Tesorito hole TS-DH09, the first hole ever drilled

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

01/03/2020  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 company makers come with their own challenges ...

Porphyry copper deposit - Wikipedia

Porphyry deposits represent an important resource of copper; however, they are also important sources of gold and molybdenum - with porphyry deposits being the dominant source of the latter. In general, porphyry deposits are characterized by low grades of ore mineralization, a porphyritic intrusive complex that is surrounded by a vein stockwork and hydrothermal breccias . [7]

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