gold deposits porphyry copper

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

2002-10-1 · Porphyry copper deposits are among the largest reservoirs of gold in the upper crust and are important potential sources for gold in lower temperature epithermal deposits. Whether gold remains in porphyry copper deposits is important both to their economic attractiveness and to the distribution of gold in the upper crust.

Gold in Porphyry Copper Deposits: Experimental ...

2000-3-1 · 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.

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

Porphyry copper deposits are among the largest reservoirs of gold in the upper crust and are important potential sources for gold in lower temperature epithermal deposits. Whether gold remains in porphyry copper deposits is important both to their economic attractiveness and to the distribution of gold

(PDF) Distribution of gold in porphyry copper deposits

Gold grades are less than 0.05 ppm in the porphyry copper-molybdenum deposits. Between these end members is an economically important group containing significant amounts of both gold and ...

Gold endowments of porphyry deposits controlled by ...

2020-1-14 · 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.

Reduced porphyry copper-gold deposits: A new variation on ...

2000-6-1 · These “reduced” porphyry Cu-Au deposits lack primary hematite, magnetite, and sulfate minerals (i.e., anhydrite), but contain abundant hypogene pyrrhotite, commonly have carbonic-rich ore fluids with substantial CH 4, and are associated with ilmenite-bearing, reduced I-type granitoids.

Porphyry Deposits 101 - Doubleview Gold Corp.

It is estimated that the Earth’s porphyry copper deposits contain approximately 1.7×10 11 tonnes of copper. 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.

Geology of Porphyry Copper Deposits

2015-3-22 · 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.

DISCOVERING WORLD CLASSGOLD AND GOLD-COPPER

2021-2-1 · 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 –

Characteristics and controls of the largest porphyry ...

2007-5-9 · Eleven gold‐rich porphyry copper and 14 epithermal gold deposits around the Pacific rim contain > 200 t (‐7 million oz) of gold. These large porphyry‐type deposits conform to a single overall model, whereas the large epithermal gold deposits are varied in both genetic type and mineralisation style. Most regional and local characteristics of the largest porphyry and epithermal deposits fail to

(PDF) Distribution of gold in porphyry copper deposits

Gold grades are less than 0.05 ppm in the porphyry copper-molybdenum deposits. Between these end members is an economically important group containing significant amounts of both gold and ...

The geological characteristics, geochemical signature and ...

2020-1-14 · gold-bearing, global porphyry systems are related to potassic magmas. About 60% of the gold that is contained in the 25 largest porphyry copper-gold deposits in the world, as ranked by gold content, occurs in nine potassic magma-related deposits (Garwin, 2019). In

Geophysical signatures of copper-gold porphyry and ...

2015-3-19 · situ measurements of porphyry copper deposits 1.5. Cross-section of alteration zones characteristic of high-sulphidation deposits 1.6. Diagram of hypothetical low sulphidation epithermal gold deposit to illustrate the effect of erosion level on geophysical responses 2.1 Batu Hijau geology, sulphide content, alteration, and RTP magnetics

The Paleoproterozoic Copper-Gold Deposits of the Gaoua ...

Formation of the early porphyry copper deposit took place at 2165 ± 24 Ma based upon Re-Os dating of the early pyrite; the age of the younger gold event, which is similar in style to that described throughout the West African craton, is not known but may be related to one of the lode gold episodes that are widespread through the West African ...

Portable XRF for Analysis of Copper Gold Porphyry Deposits

This study found that the Vanta analyzer worked well on prepared samples but could not accurately resolve SiO2 on crushed or intact rocks. This is to be expected due to the hetero

Controls on the Formation of Porphyry Copper and Gold ...

2021-5-9 · 活动作品 Controls on the Formation of Porphyry Copper and Gold Deposits-Massimo Chiaradia 189 播放 · 0弹幕 2021-05-09 04:51:37 9 4 15 1 稿件投诉 未经作者授权,禁止转载 瑞士日内瓦大学的研究员Massimo Chiaradia教授,国际著名的矿床学 ...

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.

Geochemical Characteristics of Intrusive Rocks ...

porphyry copper-gold deposits in eastern Mindanao 3.1 The eastern Mindanao copper-gold belt The mineralized areas in eastern Mindanao consist of several porphyry copper deposits and prospects such as Boyongan in the north-eastern portion and the Tagpura-Kalamatan-Maangob (Batoto area), Amacan and Kingking in the south-eastern portion (Figs 1, 3).

Gold concentrations of magmatic brines and the metal ...

1999-6-17 · Porphyry copper–molybdenum–gold deposits are the most important metal resources formed by hydrothermal processes associated with magmatism. It remains controversial, however, whether the

Enrichment of Platinum‐group Elements (PGE) and Re‐Os ...

2014-8-28 · Platinum-group elements (PGE) in PGE-rich porphyry copper (gold) deposits are mainly Pt and Pd, whereas the concentrations of other PGE (Ru, Rh, Os, Ir) are significantly low. Moreover, Pt and Pd mainly exist in sulfides in the forms of crystal lattice or tiny platinum-group mineral (PGM) inclusions. The present data show that there is a ...

(PDF) Super Porphyry Copper & Gold Deposits-A Global ...

Magmatic-related porphyry copper and high-sulphidation epithermal copper-gold ore deposits are spatially and temporally clustered in arc segments that underwent crustal shortening during magmatic ...

UNITED STATES DEPARTMENT OF THE INTERIOR U.S.

2010-11-6 · molybdenum content of porphyry copper-gold deposits is related to the fact that, in many systems, molybdenum is distributed as a peripheral zone outside the copper-gold orebody that itself has a low molybdenum grade. At Dos Pobres (Langton and Williams, 1982), 0.005 to 0.015 percent molybdenum occurs in a

Geophysical signatures of copper-gold porphyry and ...

2015-3-19 · situ measurements of porphyry copper deposits 1.5. Cross-section of alteration zones characteristic of high-sulphidation deposits 1.6. Diagram of hypothetical low sulphidation epithermal gold deposit to illustrate the effect of erosion level on geophysical responses 2.1 Batu Hijau geology, sulphide content, alteration, and RTP magnetics

Gold in Ural Porphyry Copper-Gold Deposits — National ...

Deposits in the porphyry copper family include porphyry copper ones proper (Au to 0.3-0.4 ppm, Cu/100Au usually 500-2000) and porphyry ones (Au 0.5-3 ppm, Cu/100Au 11-150), which are distinguished by the markedly different gold contents in the sulfides (respectively 0.01-0.8 and 1-11 ppm).

DISCOVERY OF THE CADIA RIDGEWAY GOLD-COPPER PORPHYRY DEPOSIT

Key Words: Cadia, gold, copper, porphyry, drilling, magnetics, induced polarisation Introduction The Cadia Ridgeway deposit is one of a group of porphyry-style deposits discovered since 1992 by Newcrest geologists (Wood and Holliday, 1995; Holliday et

Reduction of oxidized sulfur in the formation of the ...

2021-2-5 · The Grasberg porphyry copper-gold deposit is located in the Ertsberg-Grasberg mineral district in the province of Papua, Indonesia and lies within the New Guinea fold-and-thrust belt (Fig. 1a).Grasberg is the world’s largest gold-rich porphyry copper deposit and its mineral district also contains a number of large mineralized copper-gold skarns (Cooke et al. 2005).

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.

Beutong Copper Gold | Asiamet Resources

Beutong is a large high-quality copper, gold, silver, molybdenum deposit outcropping at surface and remaining open laterally and at depth. Contained metal in Resource on a 100% basis comprises 2.43Mt (5.3BIb) copper, 2.11Moz gold and 20.9Moz silver (1.95Mt (4.30Blb) copper, 1.69Moz gold

High-temperature magmatic fluid exsolved from magma

2019-9-19 · The Duobuza porphyry copper–gold deposit (proven Cu resources of 2.7 Mt, 0.94% Cu and 13 t gold, 0.21 g t)1 Au) is located at the northern margin of the Bangong-Nujiang suture zone separating the Qiangtang and Lhasa Terranes. The major ore-bearing porphyry consists of granodiorite. The alteration zone extends from

Reduction of oxidized sulfur in the formation of the ...

2021-7-9 · mineralized copper-gold skarns (Cooke et al. 2005). At a cutoff grade of 0.1% Cu, the Grasberg intrusive-related system, com-prising the Grasberg copper-gold porphyry and Kucing Liar skarn deposits, contains 7.5 billion tons of in situ mineralization with a

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