Hydrothermal Controls on Metal Distribution in Porphyry Cu …
Extensive research during the 20 th century on porphyry Cu (-Mo-Au) deposits has revealed the following major geodynamic, petrological, mineralogical, and geochemical features that characterize these deposits: (1) these systems commonly occur in continental and oceanic magmatic arcs or in collisional orogenic belts; (2) they have spatial and genetic relationships to …
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Skarns in the Porphyry Copper-Gold Environment
Although usually treated as separate to the adjacent porphyry copper-gold (Cu-Au) deposit, skarns near porphyry deposits are commonly inextricably part of the larger Cu-Au system(s). …
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Geology and Genesis of Major Copper Deposits and …
Each metallogenic epoch introduced its own deposit type(s), of which porphyry copper (and related skarn), followed by sediment-hosted stratiform copper and then iron oxide copper-gold (IOCG), are globally preeminent. Nonetheless, genesis of the copper provinces remains somewhat enigmatic and a topic of ongoing debate.
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Geology and Exploration Progress at the Resolution Porphyry …
Abstract. In 1995, the Magma Copper Company discovered a porphyry copper deposit beneath thick postmineral cover 2 km south of the historic Magma mine in S ... of which porphyry copper (and related skarn), followed by sediment-hosted stratiform copper and then iron oxide copper-gold (IOCG), are globally preeminent. ... crust and filled ...
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Two genetic models for the Middle-Late Devonian porphyry-skarn copper
In contrast, the Middle-Late Devonian porphyry-skarn copper deposits in the eastern Junggar terrane are spatially distributed within the Dulate arc, ... Large-scale porphyry-type mineralization in the Central Asian metallogenic domain: A review. J. Asian Earth Sci., 165 (2018), pp. 7-36.
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Exhumation and Preservation of the Yangchuling Porphyry …
The Yangchuling porphyry W-Mo deposit (YPWD), located in the Jiangnan porphyry-skarn tungsten ore belt, is one of the most important and large-scale porphyry W-Mo deposits …
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Geochronological constraints on skarn copper …
The Sayak ore field, composed of several separated skarn Cu and porphyry Cu-Mo deposits and Cu-Au-Mo lodes in the Sayak synclinorium, is the only one area with the occurrence of large-scale skarn ...
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The Southwestern North America Porphyry Copper Province
The apparent lack of Eocene to Oligocene porphyry deposits is also difficult to account for; hypabyssal rocks of this age are quite common and copper-bearing polymetallic skarn and high-temperature replacement and vein deposits are locally associated with them, but there is only one small, low-grade porphyry deposit of this age documented in ...
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Porphyry copper deposits in China | Request PDF
Jiama is a giant skarn-porphyry deposit in southern Tibet, southwestern China. ... The Pulang deposit is a large-scale Late Triassic porphyry copper deposit in this region and is located at 28 ...
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PORPHYRY DEPOSITS W.D. SINCLAIR Geological Survey …
In porphyry Cu deposits, for example, Cu grades range from 0.2% to more than 1% Cu; in porphyry Mo deposits, Mo grades range from 0.07% to nearly 0.3% Mo. In porphyry Au and Cu-Au deposits, Au ...
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GEOCHEMICAL AND TECTONIC INSIGHTS INTO PORPHYRY COPPER DEPOSITS…
Porphyry copper deposits (PCDs) are vital sources of copper, gold, and molybdenum, significantly impacting the global economy. ... and large-scale metal enrichment. ... skarn and epithermal ...
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LARGE DISTAL-DISSEMINATED PRECIOUS-METAL …
Anomalies at the Fortitude Gold Skarn, Battle Mountain Mining District, Nevada"). At Copper Canyon, gold-bearing ... DEPOSIT Mo CANYON Mo BUFFALO COPPER Porphyry systems Distal disseminated Ag-Au deposit TOP ZONE ... (Bloomstein and others, 1991)—large-scale additions of K2O are not as common in most classic Carlin-type deposits. Some ...
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Porphyry and Skarn Cu-Au Deposits and its Associated …
PROCEEDINGS OF BANDA AND EASTERN SUNDA ARCS 201 2 MGEI ANNUAL CONVENTION 26-27 November 201 2, Ma lang, East Java, Indonesia 279 Porphyry and Skarn Cu -Au Deposits and its Associated Cu -Au ...
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Chapter 6 Geology of the Bingham Canyon Porphyry Cu …
Large-scale bulk mining of enriched ore from the Bingham Canyon (Bingham) porphyry copper deposit commenced in 1906 (De Kalb, 1909; Krahulec, 2010), and open pit mining has …
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The Chain of Processes Forming Porphyry Copper Deposits…
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 porphyry gold deposits (e.g., Kisladag; Baker et al., 2016) or porphyry-molybdenum deposits (e.g., Climax, Henderson; Seedorff and Einaudi, 2004). Metal ratios not only vary ...
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Supergiant porphyry copper deposits are failed large …
The last decades have seen a continuous increase in the understanding of how porphyry copper deposits form. Several studies have unveiled the different processes that control the formation of ...
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Potassium silicate alteration in porphyry copper‑gold deposits…
More than two thirds of the annual global production of copper (Singer, 2017) comes from 'porphyry copper' deposits – the very large hydrothermal ore deposits that formed inside the cores of volcanic systems that were active in magmatic arcs throughout the Phanerozoic (Henley and Berger, 2013; Henley and Ellis, 1983; Sillitoe, 1973; Sillitoe, 2010).
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The role of porphyry-related skarns in the Chating porphyry …
The Chating deposit is a large porphyry copper deposit in the Xuancheng district of the MLYB (Fig. 1; Lu et al., 2019, Xiao et al., 2019, Zhou et al., 2020) and is associated with …
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Multi-scale exploration of giant Qulong porphyry deposit …
Nearly 75% Cu, 90% Mo, and 25% Au globally are obtained from porphyry copper deposits (PCDs). PCDs are unique with large tonnage, low grade, disseminated or stockwork-veinlet, and chalcopyrite-molybdenite mineralization (Sillitoe, 1972, Sillitoe, 2010, Richards, 2003).Traditional PCDs are predominately associated with subduction-related arc magmas and …
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Prospecting model and deep mineralization predictions for …
Geophysical surveys have revealed broad prospects for deep zones I, II and III. The discovery of the Lamasu-Saibo copper deposit in the western Tianshan region of Xinjiang, China, has filled a significant gap of large porphyry-skarn-type copper deposits in the region.
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LARGE DISTAL-DISSEMINATED PRECIOUS-METAL …
At Copper Canyon, gold-bearing skarns are present in a widespread 39–Ma skarn-related, porphyry copper system, including the Fortitude gold skarn (approximately 2 million oz Au, …
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Porphyry Copper Systems of the Boulder batholith, Montana
The composite Boulder batholith, a large mass of intrusive igneous rock, in southwest Montana hosts a variety of mineral deposit types including: ... historic skarn deposits in the Elkhorn Mountains. In 2022 and 2023, the USGS Earth Mapping Resources Initiative (EarthMRI) conducted high-resolution airborne magnetic and radiometric surveys flown ...
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Philippine Porphyry and Epithermal Deposits: An …
The first large-scale copper mining operations in the Philippines commenced at Carawisan in 1842 and Mankayan in 1864 (Bureau of Mines and Geosciences, 1986). ... Each district contained more than 35 Moz of gold resources and several millions tonnes of copper in porphyry, epithermal, and skarn deposits (Waters et al., 2011). Three papers in ...
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(PDF) Porphyry and Skarn Cu-Au Deposits and its …
The Ertsberg district is exceptional for the world class Copper-Gold deposits that it hosts, including the Grasberg Porphyry, the Ertsberg East Skarn System, and the Kucing Liar Skarn. Each of these 3 major deposits would be recognized as super ... Three large-scale mines are presently in operation in the Ertsberg district, including the ...
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Shortwave infrared (SWIR) spectroscopy for greenfield …
Jiama is the second largest porphyry-skarn system within the Gangdese porphyry Cu belt in Southern Tibet (Yang and Cao, 2024), hosting over 7 Mt of copper metal with an average grade of 0.4 % (NI43-101 compliant; China National Gold Group, 2023).The deposit consists of multiple porphyry-hosted Cu-Mo, hornfels-hosted Cu-Mo, manto Cu-Pb-Zn, and ...
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Preliminary Model of Porphyry Copper Deposits
polymetallic veins and replacements, and epithermal veins. Copper skarn deposits occur near many porphyry copper host intru-sions that intruded carbonate-bearing units (Einaudi and others, 1981), and skarn mineral zoning patterns may be useful in the targeting of a potentially associated porphyry copper deposit (Meinert and others, 2005).
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Skarns in the Porphyry Copper-Gold Environment
Both skarn and porphyry alteration and mineralization can contribute to the metal resource, for example, the Ertsberg-Grasberg copper deposit in Indonesia, the Mines Gaspé copper deposit, Quebec ...
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(PDF) Porphyry and Skarn Cu-Au Deposits and its …
The ESZ deposit is hosted entirely within the Ertsberg Diorite approximately 200m southwest of the East Ertsberg Skarn System (EESS). The ESZ resource is 300m wide, 800m long and over 600m high...
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Geologic Setting and Evolution of the Porphyry Copper …
The porphyry copper mineralization at Los Pelambres is contained in two contiguous deposits, Los Pelambres (Cu-Mo) and Frontera (Cu-Au), which together constitute the third largest copper concentration (∼36 million metric tons (Mt) Cu) in the Miocene to early Pliocene belt of central Chile.
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Geochemistry of garnet and scheelite as indicators for skarn …
To understand the mechanism of skarn-type Mo-W mineralization, it is crucial to study fluid evolution. In-situ elemental analysis was conducted on garnet and scheelite from the Shibaogou deposit, a representative large-scale skarn Mo-W deposit in the Luanchuan orefield, Qinling orogen, aiming to constrain the origin and evolution of ore-forming fluid and to analyze …
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