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The key geological characteristics of porphyry copper-(gold) systems include distal to proximal intrusive dykes and small causal porphyritic stocks, with hornblende occurring as phenocrysts …
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porphyry systems, like, among others, Chuquicamata, Rio Blanco ... almost the 60% of the gold of porphyry Cu–Au deposits20). These seven deposits (Kadjaran, Cadia, Kalmakyr, Oyu Tolgoi, …
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Porphyry Cu systems are initiated by injection of oxidized magma saturated with S- and metal-rich, aqueous fluids from cupolas on the tops of the subjacent parental plutons. The sequence …
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The quartz diorite porphyry intruded into the carbon-bearing wall rocks produced abundant CH 4 by thermal decomposition of organic matter (δ 13 C CH4 = −26.3 to −28.5‰), …
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PDF | On Jan 1, 2005, Craig J. R. Hart published Classifying, Distinguishing and Exploring for Intrusion-Related Gold Systems | Find, read and cite all the research you need on ResearchGate
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The higher gold contents of more alkaline porphyry systems (Müller and Groves, 2019) support such a model, as do zircon compositions from fertile porphyry systems (Bao et …
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Here, I show that porphyry Cu–Au deposits define two distinct trends in Au vs. Cu tonnage plots (Cu-rich and Au-rich). Metal endowments for both trends grow larger the longer …
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Reconstruction of the porphyry systems suggests that gold-bearing quartz stockworks were generated 600 to 1,000 m beneath paleosurfaces.Gold-rich porphyry …
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Javorieite, KFeCl 3, is a new mineral, commonly hosted by salt melt inclusions enclosed in vein quartz in the Biely Vrch porphyry gold deposit, in the Central Slovakia …
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Abstract Higher gold grades (0.1–1 g/t) in porphyry systems of northern Eurasia make them competitive with the Andean porphyries despite usually smaller volumes of …
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Porphyry copper±molybdenum±gold deposits (PCDs) are the most representative magmatic-hydrothermal metallogenic system above subduction zones with important economic value. Previous studies revealed that large …
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Porphyry systems are one of the most significant sources of the world's copper, molybdenum, and gold production. They are large, disseminated mineral deposits formed from hydrothermal …
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In gold-enriched porphyry copper systems the close correlation between gold grade and copper grade in the potassic altered zone is well documented (Dos Pobres, Granisle, Bell, …
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Copper–gold porphyry deposits are the world's main source of copper and a significant source ofgold. They consist of vein networks and their surrounding alteration zones.
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Porphyry deposits show a large range of concentrations in three main ore elements Cu, Au, and Mo, to the point that some deposits are mined for a single commodity such as …
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Fig. 1: Transcrustal magmatic systems associated with porphyry copper deposits and with large eruptions. Fig. 2: Cu endowments (Mt) versus duration of magma injection into …
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Porphyry-type mineral deposits are the main source of copper and an important source of gold. These deposits are characterized by highly variable metal endowment ranging from Cu-rich …
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The Kharmagtai porphyry copper–gold district is located in a belt of Mid-Palaeozoic arc-related calc-alkaline to high K calc-alkaline igneous rocks known as the southern Mongolia magmatic …
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The mineral name refers to the Javorie stratovolcano, which hosts most porphyry gold systems in this volcanic field. Within the inclusions, javorieite occurs in the form of small …
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The Beiya gold–polymetallic orefield, with gold reserves of 305 t, is one of the most representative porphyry-skarn orefields in the Jinshajiang–Ailaoshan Cu–Au ore belt within the …
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The basics of porphyry deposits can be summarized as follows: 1. Definition: Porphyry deposits are a type of mineral deposit that form from large-scale hydrothermal systems associated with intrusive igneous rocks. 2. Characteristics: Porphyry deposits are characterized by the presence of …
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Hypogene mineralization is hosted in wallrock and a sheeted pyrite-polymetallic vein system developed in the apical portion of a porphyritic andesitic-dacitic intrusion emplaced within Silurian clastic sedimentary rocks.
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Porphyry ore deposits supply much of the copper, molybdenum, gold and silver used by humans. A review of the main processes that trigger porphyry ore formation suggests …
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Hoschke, T., (2012): Geophysics of the Elang Cu-Au porphyry deposit, Indonesia, and comparison with other Cu-Au porphyry systems, 22nd International Geophysical Conference & …
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Porphyry and Epithermal Systems -Science-driven Exploration Successes Richard Sillitoe. Porphyry and epithermal deposits Porphyry copper-molybdenum and copper-gold deposits are centred on shallow-level porphyry …
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Recent analytical and experimental data summarized here provide a basis for estimating the original gold endowment of porphyry copper deposits, the behavior of this gold …
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TSX-listed NGEx Minerals on Wednesday announced a new discovery at its Lunahuasi project, in San Juan, Argentina, confirming the presence of a major copper/gold …
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many porphyry and epithermal deposits (Corbett, 2008). Studies of the Philippine geothermal systems have allowed us to apply time to porphyry systems and better understand their staged …
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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 …
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"The oxidized intrusion-related gold systems are all directly associated with porphyry copper systems in one way or another, so their tectonic settings are the same," …
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This paper reviews the effects of hydrothermal alteration on magnetic properties and magnetic signatures of porphyry copper and iron oxide copper-gold systems and presents …
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Formation of the Qiyugou porphyry gold system in East Qinling, China: insights from timing and source characteristics of Late Mesozoic magmatism Available to Purchase. …
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The major products from porphyry copper deposits are copper and molybdenum or copper and gold. The term porphyry copper now includes engineering as well as geological …
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