Porphyry, epithermal, and skarn deposits are major deposit types in the world, producing large amounts of Cu, Au, Ag, Fe, W, Sn, Mo, Pb, and Zn, as well as other critical, nonferrous, and precious metals each year. ... as well as other copper and iron minerals including chalcopyrite, bornite, secondary magnetite, and specular hematite ...
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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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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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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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The Jiurui porphyry-skarn polymetallic district, situated in the Middle-Lower Yangtze River metallogenic belt (YRB), is one of most important producers of copper and gold polymetallic resources in China (Jiang et al., 2008, Jiang et al., 2013, Mao et al., 2011, Zhou et al., 2015).The Cretaceous Wushan skarn copper deposit in South China is the largest copper deposit in the …
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The main ore deposits are porphyry-skarn-epithermal copper polymetallic deposits and magmatic hydrothermal vein deposits, and their metallogenic ages are from 170 to 12 Ma. ... Several large-scale ...
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DOI: 10.1016/J.OREGEOREV.2015.02.015 Corpus ID: 128688347; Geology and genesis of the giant Beiya porphyry–skarn gold deposit, northwestern Yangtze Block, China @article{Deng2015GeologyAG, title={Geology and genesis of the giant Beiya porphyry–skarn gold deposit, northwestern Yangtze Block, China}, author={Jun Deng and Qingfei Wang and …
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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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In contrast, most economically important skarn deposits result from large scale metasomatic transfer, where fluid composition controls the resulting skarn and ore mineralogy. This is the mental image that most people share of a "classic" …
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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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Download Citation | On Nov 1, 2024, Long Ren and others published Magmatic control on orebody distribution of porphyry-skarn gold-copper deposit: A case study of Beiya deposit from Sanjiang ...
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Jiama, with more than 11 Mt of copper metal, is the largest porphyry-skarn copper system in the Gangdese metallogenic belt, Tibet, China, creating ideal conditions for deciphering the origin of porphyry ores in a collision setting. ... thick (about 252 m), skarn-type Cu polymetallic orebodies in the deep part started the large-scale economic ...
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Underground mining of the skarn-hosted Highland Boy cop-per deposit commenced in 1896. 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 continued almost without in-terruption since then. Given its long life, Bingham is one ...
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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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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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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 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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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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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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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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Porphyry copper systems also host some of the most widely distributed mineralisation types. From convergent plate boundaries, including porphyry deposits centred on intrusions, to skarn, and sediment-hosted gold deposits in increasingly peripheral locations, they are as varied as they are consistently large.
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The large skarn copper deposits in China mainly include Tongguanshan, Jiama, Yongpingshan, and Chengmenshan [5]. The Jiama copper polymetallic deposit is a giant (11 Mt) skarn copper deposit in the Gangdise metallogenic belt, Xizang [14], [20], and it is composed of porphyry Mo–Cu, skarn Cu polymetallic, vein Au and manto orebodies [14].
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The Cretaceous Wushan skarn copper deposit in South China is the largest copper deposit in the Jiurui ore field (Fig. 1), containing 1.37 million tons (Mt) of copper metal and 12.3 Mt of sulfur (Dong, 2015). The orebodies are controlled by structures and enlarged locally due to …
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The identified gold deposits in Indonesia are copper-gold porphyry, skarn, high and low epithermal sulfidation system, sediment-hosted gold, gold-silver-barit and base metals deposits and kelian ...
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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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es of porphyry deposits in the Gangdese metallogenic belt (Li and Rui, 2004; Li et al., 2006; Qin, 2008; Zhao et al., 2009), including a series of large porphyry Cu (Mo) deposits (Li et al., 2007; Xiao et al., 2008, 2009) and a large porphyry-skarn copper (with lead and zinc) composite bed. The discovered deposit in the Gandese
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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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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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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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Recently, series of major breakthroughs for porphyry copper exploration have been made in the Gangdese Metallogenic belt in Tibet. Alteration and mineralization ages of the Gangdese porphyry-skarn ...
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