porphyry gold systems

porphyry gold systems

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

2002-10-1 · Porphyry copper deposits contain up to 100 t of gold and are among the largest reservoirs of gold in the upper crust (Kerrich et al., 2000). They are commonly surrounded by deposits and country rock containing gold that is thought to have been derived from them (Jones, 1992). Gold can be removed from porphyry copper systems by vapors that ...

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

Gold can be removed from porphyry copper systems by vapors that separate at high temperatures or by lower-temperature hydrothermal solutions that alter the deposit as it cools. Whether gold remains in porphyry copper systems or is removed from them is important both to their economic attractiveness and to the overall distribution of gold in the ...

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Evolution of Porphyry-Epithermal Gold Systems Using

2019-4-22 · Evolution of Porphyry-Epithermal Gold Systems Using Trace Elements: Insights from the Iron Cap Deposit, Kerr-Sulphurets-Mitchell District, Northwestern British Columbia (NTS 104B) H.C. Graham, School of Earth and Environment, University of Leeds, Leeds, United Kingdom, [email protected]

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Distribution and composition of gold in porphyry gold ...

2018-3-14 · Gold is an important ore metal in many porphyry type deposits. Porphyry deposits with average gold content of > 0.4 ppm may be defined as gold rich (Sillitoe 1979); however, there exists a continuum of systems from copper plus by-product gold through gold plus by-product copper to gold-only end members (Sillitoe 2017).In contrast to much more common porphyry

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IGNEOUS PETROLOGY OF THE COLOSA GOLD-RICH

2018-1-16 · Gold, 2009). The Colosa porphyry has inferred resources of 468.8 Mt at 0.86 g/t (AngloGold Ashanti, 2008) which makes it the porphyry gold system with the biggest tonnage of material and contained Au discovered to date (Fig. 2). Regional Geologic Setting The Central Cordillera of Colombia has a complex history of collision, accretion, faulting,

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(PDF) Porphyry systems and ore deposits: A series of ...

2022-2-10 · Porphyry Systems at least equal to Or ogenic in gold importance. Orogenic =1 at 80 - 110 Moz , 3 at 40 - 80 Moz , 12 at 15 - 40 Moz Porphyry=2

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Porphyry Deposits 101 - Doubleview Gold Corp.

Porphyry copper-gold deposits form in a variety of volcanic environments, most commonly in continental margins and intra-oceanic arcs. These are large scale magmatic-hydrothermal systems associated with a series of porphyritic intrusions, which result in extensive alteration footprints that we map and model to target high grade copper-gold mineralization.

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2.2 Porphyry-epithermal mineral system | Geoscience

2022-2-3 · 2.2.1 Geological setting. Mineral deposits that form in the porphyry-epithermal mineral system generally have a spatial and temporal association with intermediate to felsic sub-aerial volcanic rocks and related sub-volcanic

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Porphyry Copper Systems1 | Economic Geology |

2010-1-1 · 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 epithermal deposits.

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Evolution of Porphyry-Epithermal Gold Systems Using

2019-4-22 · Evolution of Porphyry-Epithermal Gold Systems Using Trace Elements: Insights from the Iron Cap Deposit, Kerr-Sulphurets-Mitchell District, Northwestern British Columbia (NTS 104B) H.C. Graham, School of Earth and Environment, University of Leeds, Leeds, United Kingdom, [email protected]

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Distribution and composition of gold in porphyry gold ...

2018-3-14 · Gold is an important ore metal in many porphyry type deposits. Porphyry deposits with average gold content of > 0.4 ppm may be defined as gold rich (Sillitoe 1979); however, there exists a continuum of systems from copper plus by-product gold through gold plus by-product copper to gold-only end members (Sillitoe 2017).In contrast to much more common porphyry

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IGNEOUS PETROLOGY OF THE COLOSA GOLD-RICH

2018-1-16 · Gold, 2009). The Colosa porphyry has inferred resources of 468.8 Mt at 0.86 g/t (AngloGold Ashanti, 2008) which makes it the porphyry gold system with the biggest tonnage of material and contained Au discovered to date (Fig. 2). Regional Geologic Setting The Central Cordillera of Colombia has a complex history of collision, accretion, faulting,

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(PDF) Porphyry systems and ore deposits: A

2022-2-10 · Porphyry Systems at least equal to Or ogenic in gold importance. Orogenic =1 at 80 - 110 Moz , 3 at 40 - 80 Moz , 12 at 15 - 40 Moz Porphyry=2 at 80 - 110 Moz , 3 at 40 - 80 Moz , 7 at 15 - 40 Moz

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【9.8—9.9】Porphyry Cu-Au-Mo Mineralization Systems ...

2018-6-25 · The porphyry has an estimated resource of 11.2 Mt ore @ 0.83% Sn and 0.14% W, and 10 Mt @5% Zn, 1.2% Cu, 75 ppm Ag. The Chaihulanzi gold-field is located ~40 km west of Chifeng City. It is one of three major gold deposits (Honghuagou

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The application of ZTEM to porphyry copper-gold

2019-7-12 · Pebble, Alaska: The Pebble deposit is a major copper-gold porphyry system in southern Alaska. ZTEM results over the deposit have been presented earlier by Paré and Legault (2010). The geology (plan and section) are shown in Figure 2. In addition to the ZTEM, Spectrem was flown over the deposit and surrounding area. These results have proven

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Porphyry Deposits 101 - Doubleview Gold Corp.

Porphyry copper-gold deposits form in a variety of volcanic environments, most commonly in continental margins and intra-oceanic arcs. These are large scale magmatic-hydrothermal systems associated with a series of porphyritic intrusions, which result in extensive alteration footprints that we map and model to target high grade copper-gold mineralization.

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(PDF) Skarns in the Porphyry Copper-Gold

The skarns in porphyry-skarn systems usually form at the contact zone between the intrusions and wall rock and contain massive and high-grade copper mineralization, but generally with lower total ...

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

2016-7-14 · systems have allowed us to apply time to porphyry systems and better understand their staged evolution as well as the evolved hydrothermal fluids which participate in low sulphidation epithermal vein formation (figure 3). Porphyry Au-Cu-Mo Although porphyry Au-Cu-Mo deposits display considerable variation, some broad generalisations are possible.

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Exploration Targeting in Porphyry Cu Systems Using ...

2020-6-1 · This ratio was also very effective in defining the center of the Resolution porphyry system (Cooke et al., 2020). All of the Ti-based ratios, with the exception of Ti/K, clearly coincide with the system center, although Ti/Ni shows a proximal shoulder with the maxima aligning with the 0.5 wt % Cu grade contour. Similar behavior is observed for ...

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Evolution of Porphyry-Epithermal Gold Systems Using

2019-4-22 · Evolution of Porphyry-Epithermal Gold Systems Using Trace Elements: Insights from the Iron Cap Deposit, Kerr-Sulphurets-Mitchell District, Northwestern British Columbia (NTS 104B) H.C. Graham, School of Earth and Environment, University of Leeds, Leeds, United Kingdom, [email protected]

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PORPHYRY-RELATLD LOW SULFIDATION GOLD

2022-1-26 · PORPHYRY-RELATLD LOW SULFIDATION GOLD SYSTEMS 195 Society of Eco~iom~c Geologists Special Publication No. 6, 1998, pp. 137-200 As a continuum of deposit styles, there is a spatial and temporal relationship between epithermal quartz gold- silver and carbonate-base metal gold systems. This is inter-

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IGNEOUS PETROLOGY OF THE COLOSA GOLD-RICH

2018-1-16 · Gold, 2009). The Colosa porphyry has inferred resources of 468.8 Mt at 0.86 g/t (AngloGold Ashanti, 2008) which makes it the porphyry gold system with the biggest tonnage of material and contained Au discovered to date (Fig. 2). Regional Geologic Setting The Central Cordillera of Colombia has a complex history of collision, accretion, faulting,

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See Sillitoe, 2010, Porphyry Systems (EconomicGeology ...

Porphyry Systems at least equal to Orogenicin gold importance. Orogenic=1 at 80-110 Moz, 3 at 40-80 Moz, 12 at 15-40 Moz Porphyry=2 at 80-110 Moz, 3 at 40-80 Moz, 7 at 15-40 Moz

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The application of ZTEM to porphyry copper-gold

2019-7-12 · Pebble, Alaska: The Pebble deposit is a major copper-gold porphyry system in southern Alaska. ZTEM results over the deposit have been presented earlier by Paré and Legault (2010). The geology (plan and section) are shown in Figure 2. In addition to the ZTEM, Spectrem was flown over the deposit and surrounding area. These results have proven

Read More

【9.8—9.9】Porphyry Cu-Au-Mo Mineralization Systems ...

2018-6-25 · The porphyry has an estimated resource of 11.2 Mt ore @ 0.83% Sn and 0.14% W, and 10 Mt @5% Zn, 1.2% Cu, 75 ppm Ag. The Chaihulanzi gold-field is located ~40 km west of Chifeng City. It is one of three major gold deposits (Honghuagou

Read More

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

2016-7-14 · systems have allowed us to apply time to porphyry systems and better understand their staged evolution as well as the evolved hydrothermal fluids which participate in low sulphidation epithermal vein formation (figure 3). Porphyry Au-Cu-Mo Although porphyry Au-Cu-Mo deposits display considerable variation, some broad generalisations are possible.

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PATHFINDER EXPLORATION TECHNIQUES TARGETING

2020-12-12 · ralised systems are defined within the Late Ordovician Gidginbung Volcanic Complex (Figure 2), including the historical Gidginbung high sulphidation gold mine and a number of mineralised porphyry prospects including Yiddah, Mandamah, Cullingerai, Estoril a.

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Porphyry and Epithermal Systems | PDF | Geological ...

2017-1-11 · 16 Moz gold and >600 Moz silver. 10 Tops of porphyry copper deposits. Guinaoang porphyry copper-gold system, Philippines Discovered 1983, RGC Exploration >500 Mt @ 0.4% Cu, 0.4 g/t Au. Deposit concealed beneath advanced argillic lithocap containing highsulphidation mineralization. 11 Tops of low- and intermediate-sulphidation

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A novel conceptual model of intrusion related gold

2020-10-13 · gold bearing intrusion related epithermal mineralization. Garnet, pyroxene and wollastonite are characteristic for skarn deposits. Biotite is common alteration product of mesothermal to shallow porphyry systems, whereas potassic feldspar, albite, iron oxide, scapolite and actinolite are associated to deep seated porphyry-IOCG type environments.

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