Genesis and Prospecting Potential of the Da'anhe Skarn Au …
Skarn Au deposits exist in the circum-pacific metallogenic belt. Interestingly, the Da'anhe Au deposit is the only independent skarn gold deposit in the Lesser Xing'an Range. To determine the metallogenic mechanism and prospecting potential of the Da'anhe deposit, we performed skarn mineralogy, fluid inclusion (FI) and H-O isotope analyses. …
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(PDF) The mineralogy of gold-copper skarn related porphyry at …
Clacic gold–copper bearing skarn in the Batu Hijau porphyry deposit is located in the western part of Sumbawa Island, Indonesia. Skarn mineralizations were found at the deep level of the deposit ...
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The endogenetic metallogeny of northern Laos and its …
The porphyry-type gold (copper) and skarn iron-gold ore bodies are delineated at the southern side of the Long Vi intrusion. The porphyry gold ore body is controlled by a joint-fissure zone with a length of 200–300 m and a thickness of 10–50 m. Its distribution is closely related to finely fragmented granular quartz veins and branching …
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Genetic types and framework model of Beiya gold ore
The Beiya skarn gold-polymetallic deposit is located in the middle of the Jinshajiang-Ailaoshan alkaline porphyry metallogenic belt in the Sanjiang region, and is the largest gold deposit in the ...
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Typomorphic features of placer gold from the Bystrinsky ore …
Eastern Transbaikalia is located in the Transbaikalia sector of the Mongol–Okhotsk orogenic belt, within a well-endowed copper–gold–polymetallic province with numerous epithermal, porphyry, skarn, and skarn-porphyry deposits and associated gold placers (Sotnikov and Berzina, 2000; Spiridonov et al., 2005; Goldfarb et al., 2014; …
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Geodynamic settings and tectonic model of skarn gold
The eastern segment of the orogeny ranks as the most important molybdenum repository in the world, with > 90% of the Mo metal was resourced from porphyry and porphyry-skarn deposits aged 160?105 ...
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Discovery, geology and mineralisation of the Phu Kham copper-gold
The Phu Kham copper-gold deposit is in the Lao People's Democratic Republic. The name translates literally as "Mountain of Gold". The deposit includes distal sulphide skarn, proximal silicate-oxide skarn and stockwork mineralisation styles that are spatially related to a series of intermediate porphyry dykes.
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(PDF) A Preliminary Study on Skarn‐Related Calc‐silicate …
Skarn deposits are not common in the Southwest Pacific Rim [2], but in Indonesia several significant copper gold deposits associated with porphyry systems such as Gunung Bijih, Ertsberg [3], and ...
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All about skarns
The McCoy gold skarn is only 45 km southwest of the reduced Fortitude gold skarn in northcentral Nevada, but differs dramatically in regards to the style of mineralization and wallrock alteration. The McCoy deposit contains 15.6 Mt of ore averaging 1.44 g/t Au and an additional 30,430 tonnes averaging 14.6 g/t Au that was mined …
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Application of metal zoning to gold exploration in porphyry copper
This is seen in data for the main ore types in the Bingham district: ( 1 ) copper-molybdenum-gold stockwork ore, (2) copper-gold skarn, and ( 3 ) zinc-lead-silver-gold manto ore. The in situ grade of porphyry ore mined at Bingham has been in the range of 0.7 to 0.8% Cu and 0.5 ppm Au (James, 1978; J. Black, pers. commun., 1990), …
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Discovery, geology and mineralisation of the Phu Kham …
The Phu Kham copper-gold deposit is in the Lao People's Democratic Republic. The name translates literally as "Mountain of Gold"". The deposit includes distal sulphide skarn, proximal silicate-oxide skarn and stockwork mineralisation styles that are spatially re-lated to a series of intermediate porphyry dykes. The alteration as-
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Ore Mineralogy and Geochemistry of the Phu Kham Porphyry Copper-Gold
Common ore minerals of the porphyry gold – copper relate to skarn deposit at Phukham area are Chalcopyrite (CuFeS 2 ), Pyrite (Fe S 2 ), Galena (PbS), Sphalerite (ZnS), Bornite, Covellite ...
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Porphyry Copper, Gold, Molybdenum, Tungsten, Tin, Silver
The large size and structural control (e.g., veins, vein sets, stockworks, fractures, 'crackled zones', and breccia pipes) serve to separate porphyry deposits from genetically-related (e.g., some skarns, high-temperature mantos, breccia pipes, peripheral mesothermal ("intermediate"�, "transitional"�) veins, epithermal ...
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A giant porphyry-skarn-epithermal Mo-W-Cu-Zn-Pb-Ag …
Semantic Scholar extracted view of "A giant porphyry-skarn-epithermal Mo-W-Cu-Zn-Pb-Ag metallogenic system in the Nannihu ore field, southern North China Craton: constraints from new geochronological and pyrite geochemical data" by Zhan-Ke Li et al. ... Gold deposits in Precambrian cratons were mostly generated during the formation and ...
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Timing of skarn gold deposition in the giant Beiya polymetallic gold
Hydrothermal monazite, coprecipitated with skarn gold, was identified at Beiya. • In situ SIMS Th-Pb dating on monazite yielded a robust age of 36.0 ± 0.5 Ma. • The quartz monzonite porphyry accounts for the skarn gold mineralization. • Skarn gold deposition was broadly coeval with the formation of molybdenite.
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Geochronology of the giant Beiya gold-polymetallic deposit …
Skarn is the main mineralization type in the Beiya deposit (Fig. 3, Fig. 4).KT52 occurring around the Wandongshan porphyry is the largest skarn ore body (Fig. 3) in the ore field and its proven reserves are 87.2 Mt of gold ore with a mean grade of 2.35 g/t, along with 90.27 Mt of iron ore with an average grade of 34% Fe, 111.8 Mt of copper …
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Reduction of oxidized sulfur in the formation of the Grasberg porphyry …
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 ... comprising the Grasberg copper-gold porphyry and Kucing Liar skarn deposits, contains 7.5 billion tons of in situ mineralization with a grade of 0.7% Cu and 0.64 ppm Au (Leys …
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Geology and geochemistry of the Phu Lon copper-gold …
typical of porphyry copper environments (Burnham and Ohmoto, 1980). Therefore, any exsolved magmatic fluid associated with the Phu Lon plutons would have been oxidised potentially rich in sulphur, copper and even gold. These fluids would have been critical in forming the mineralised skarn at Phu h. Based on crosscutting
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Skarn deposits » Geology Science
It is primarily a copper-gold-molybdenum porphyry deposit, but also includes skarn mineralization with significant reserves of tungsten. Antamina Mine, Peru: This is a large copper-zinc-silver-gold skarn deposit located in …
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The role of porphyry–related skarns in the Chating porphyry …
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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New Paleomagnetic results from the Beiya porphyry-skarn gold
The Chuan-Dian Fragment (CDF), in the southeastern Tibetan Plateau, is crucially important for understanding the intra–continental deformation behavior of the blocks between the stable Yangtze craton and the Indian Plate after the Indian-Asian collision. The Beiya porphyry-skarn gold–polymetallic deposit at the northwestern part …
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U–Pb, Re–Os, and 40Ar/39Ar geochronology of …
The porphyry-related, gold skarn district of Nambija has been one of the main gold producers of Ecuador with an estimated 62 t of gold extracted mostly by artisanal methods since the 1980s. Previous K–Ar dating …
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(PDF) The Mineralogy of the Copper – Gold Ore Deposits …
Keywords: Phu Kham, Laos, porphyry copper - gold, skarn, intrusive rock. Abstract : The Phu Kham "Mountain of Gold" copper - gold deposit is located in the Xaisomboun. District in Vientiane ...
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Mineralogy and mineral chemistry of Bi-minerals …
The Beiya gold deposit (323t of gold @ 2.47 g/t) is located in the centre of the Jinshajiang-Ailaoshan potassium alkaline porphyry Cu-Au metallogenic belt in SW China, which is the largest skarn ...
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A Preliminary Study on Skarn‐Related Calc
Batu Hijau is a world‐class gold‐rich porphyry copper deposit, situated in Sumbawa Island, Indonesia. Deep drilling indicates that several intervals of calc‐silicate rock were intersected, where they are apparently interbedded with volcaniclastic rocks. The calc‐silicate rocks occur at the contact with copper‐gold‐bearing tonalite porphyries. The …
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Geodynamic settings and tectonic model of skarn gold …
Although formerly regarded as a porphyry copper belt, a typical porphyry–skarn copper–gold belt, or porphyry copper skarn system as classified by Meinert (1989), the Tibet–Sangjiang region may be an important skarn gold belt. The Central China Orogen, contains the Baxi, Deerni, Saishitang, Yemaquan, Kendekeke …
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Evolution of the gold (copper) mineralization in the porphyry …
Astarghan deposit includes skarn, porphyry and epithermal mineralizations (Cu–Au).. Epithermal mineralization of Au in Astarghan shows low-sulfidation characteristics. • Tetrahedrite and stibnite are the main hosts for gold in the Astarghan deposit.. Native gold also occurs in epithermal quartz veins as tiny particles of 50–200 …
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BC's Quesnel Trough: 1,000 km of mineral potential
The Quesnel Trough, also known as the Quesnel Terrane, is a Triassic/Jurassic-age arc of volcanosedimentary and intrusive rocks that hosts a number of alkalic copper-gold porphyry deposits with copper gold and silver values and sometimes molybdenum. The Trough runs northwest some 1,000 km from the U.S. border in south-central British …
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The geology and mineralogy of the Beiya skarn gold
The Beiya gold deposit (323t of gold @ 2.47 g/t) is located in the centre of the Jinshajiang-Ailaoshan potassium alkaline porphyry Cu-Au metallogenic belt in SW China, which is the largest skarn ...
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Great Pacific Gold to Acquire Papua New Guinea Focused …
The Tinga Valley Property is characterised by a drill ready, well-defined high-grade copper-gold porphyry and associated skarn exploration targets. Historical work has indicated the existence of an epithermal overprint as well as an excellent potential for project size with multiple porphyry bodies along a large alteration halo across a 2.5km x ...
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