2015-6-27 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 made it possible to profitably mine these deposits despite their relatively low ore grades.
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This report contains a revised descriptive model of porphyry copper deposits (PCDs), the world’s largest source (about 60 percent) and resource (about 65 percent) of copper and a major source of molybdenum, gold and silver. Despite relatively low grades (average
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2015-3-22 Porphyry copper deposits ppt. Here let’s understand the geology of porphyries and iron oxide copper gold deposits or IOCG as they are known. These are
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2020-1-1 Porphyry copper deposits (PCDs) represent shallow level intrusions (2–5 km) in the crust. Mineralization of Cu ores tend to occur at the tops of porphyry systems in cupolas. Possible regimes where Cu may be mobilized include hydrothermal circulation at mid-ocean ridge centers, dehydration or melting of the subducting slab, and late stage ...
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2016-11-5 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
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Copper was mostly removed from the sericitic capping, but iron, molybdenum, and gold were relatively immobile during supergene leaching.Interpretation of the space-time patterns and relations of the mineralization, alteration, volcanism, and intrusion allows reconstruction of the depositional environments of the El Salvador porphyry copper deposit.
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2021-11-11 Porphyry Copper Deposits of the World: Database And Grade and Tonnage . Models, 2008 . By Donald A. Singer 1, Vladimir I. Berger 1, and Barry C. Moring 1.
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2017-6-26 Intrusions Associated with PorphyryCopper Deposits Intrusions associated with, porphyry copper deposits arediverse but generally felsic and differentiated. Those in island arc settingshave primitive strontium isotopic ratios (87Sr/86Sr of 0.702 to 0.705)
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2007-5-16 Geologic maps are a fundamental data source used to define mineral-resource potential tracts for the first step of a mineral resource assessment. Further, it is generally believed that the scale of the geologic map is a critical consideration. Previously published research has demonstrated that the U.S. Geological Survey porphyry tracts identified for the United States, which are based on 1 ...
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2021-4-13 Matjuschkin, V., Blundy, J. D. Brooker, R. A. The effect of pressure on sulphur speciation in mid- to deep-crustal arc magmas and implications for the formation of
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2014-5-28 Porphyry copper deposits form along convergent plate margins or more specifically, ancient subduction zones. As the dense oceanic crust becomes consumed by the mantle it begins to melt. This melting or partial melting of the crust creates magma
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Porphyry copper deposits of the world Metadata Updated: March 22, 2021 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.
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2017-6-26 Intrusions Associated with PorphyryCopper Deposits Intrusions associated with, porphyry copper deposits arediverse but generally felsic and differentiated. Those in island arc settingshave primitive strontium isotopic ratios (87Sr/86Sr of 0.702 to 0.705)
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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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2007-5-16 Geologic maps are a fundamental data source used to define mineral-resource potential tracts for the first step of a mineral resource assessment. Further, it is generally believed that the scale of the geologic map is a critical consideration. Previously published research has demonstrated that the U.S. Geological Survey porphyry tracts identified for the United States, which are based on 1 ...
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Andrew, R.L., 1995, Porphyry copper-gold deposits of the southwest Pacific: Mining Engineering, v. 47, no. 1, p. 33 38.
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Porphyry copper deposit densities van, from 2 to 128 deposits per 100,000 km(2) of exposed permissive rock, and the density histogram is skewed to high values. Ninety percent of the control areas ...
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Deposit type: Porphyry copper: Deposit subtype: Cu-Au: Age (Ma) 438.2 Ma: Age determination method: Ar-Ar muscovite: Age range: 438.2 ±2.7 Ma: Age reference: Forster ...
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2021-4-13 Matjuschkin, V., Blundy, J. D. Brooker, R. A. The effect of pressure on sulphur speciation in mid- to deep-crustal arc magmas and implications for the formation of
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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).
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2014-5-28 Porphyry copper deposits form along convergent plate margins or more specifically, ancient subduction zones. As the dense oceanic crust becomes consumed by the mantle it begins to melt. This melting or partial melting of the crust creates magma
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2018-11-20 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
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Porphyry copper deposits of the world Metadata Updated: March 22, 2021 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.
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2020-10-20 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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Porphyry copper deposit densities van, from 2 to 128 deposits per 100,000 km(2) of exposed permissive rock, and the density histogram is skewed to high values. Ninety percent of the control areas ...
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2021-11-13 Porphyry Deposits. The Importance of Porphyry Deposits as a Copper and Gold Resource Gold Resources. Copper Resources A Geological Cross Section through the Batu Hijau Porphyry Deposit, Indonesia (920 million tons of ore grading 0.55 wt.% Cu, 0.42 g/t Au) Batu Hijau Porphyry Cu-Au Deposit, Indonesia Batu Hijau Porphyry Cu-Au Ores Hypogene ...
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In gold-rich porphyry copper deposits, phyllic alteration zone often contain sulfide mineralization, therefore, this zone could be identified by high chargeability anomalies and low resistivities in the induced polarization surveys. The potassic alteration zone also contains sulfide minerals and is characterized in IP data with moderate to high ...
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The Duobaoshan porphyry copper deposit was situated in Nenjiang county, NW Heilongjiang, where outcropped the Ordovician calc-alkaline volcanic suite, indicating the copper mine an arc-related porphyry deposit formed in the Caledonian orogeny. The deposit was ...
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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).
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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
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