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  • High SulphidationEpithermal Deposits

    High Sulphidation Deposit Model High Sulphidation deposits are spatially related to volcanic centres and diatremes. They often represent the upper parts of porphyry systems and the two types of mineralisation can often overlap or occur adjacent, for example Bor Serbia, Lepanto Indonesia and WafiGolpu PNG.

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  • Geology of the High Sulfidation Copper Deposits, Monywa

    Two high sulfidation deposits with some features similar to Monywa but undoubtedly generated at shallower epithermal depths are the Quaternary goldcopper deposit at Chinkuashih in Taiwan and the Cretaceous coppergold deposit at Zijinshan in eastern China So et al., 1998. At Chinkuashih gold and minor enargite mineralization occurs within veins and hydrothermal breccias in silicified

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  • High Sulphidation Epithermal Gold Deposits

    In high sulfidation deposits the mineralization is a twostage process; initial alteration followed by all mineralization itself. The image show the alterations stage, with hot acid fluids, sometimes vaporized, rising above the source intrusion and attacking the country rock as it passes on its way to the surface, the rock is progressively leached and altered so the at the feldspars break down to clays.

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  • PorphyryEpithermal Transition: Maricunga Belt, Northern Chile

    Transitions between porphyry copper deposits and highsulfidation epithermal gold deposits also have been proposed Sillitoe, 1973, 1983, 1988, 1989; Wallace, 1979; Heald et al., 1987; Rye, 1993, and recent studies of the Lepanto highsulfidation goldcopper and adjacent Far Southeast porphyry coppergold deposits Arribas et al., 1995

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  • Epithermal Gold Deposits : their characteristics & modeling

    Ore deposits: Classification vs Modeling Each ore deposit is unique like a persons finger print This uniqueness arises out of : ¾fundamental differences in processes and environments ¾local, sitespecific geologic variations And produces an extremely large variation in characteristics ¾If we group the deposits according to their characteristics, we get a

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  • An Overview of Epithermal Gold DepositsINN

    All three deposit subtypes form under similar circumstances; however, intermediate and highsulfidation deposits form at greater depths. Unsurprisingly, highsulfide deposits tend to be richer in

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  • Epithermal Gold DepositsGeology for Investors

    Oct 17, 2019· Epithermal gold deposits are among the richest gold deposits in the world with some bonanza grade ore shoots containing more than 1000 g/t gold, or in other words, a kilogram of gold for every tonne of rock mined. Unfortunately, the tonnage of ore in epithermal veins is typically small compared with other types of lower grade gold deposits. Gold mineralisation within epithermal veins

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  • Hydrothermal Alteration, Mineralization, and Structural

    The Zijinshan highsulfidation AuCu deposit is located in the middle of the Zijinshan district, and ore zones are hosted in, below, and adjacent to the Zijinshan lithocap. The host rocks are part of a Jurassic granite complex emplaced between 165 and 157 Ma.

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  • Sulfidation State of Fluids in Active and Extinct

    In highsulfidation HS epithermal deposits the sulfidation state ranges from high for copperrich enargitebearing assemblages to intermediate for the later goldrich tennantitetetrahedrite + pyrite assemblages, with similarities to and overlap with the basemetal veins. In intermediate sulfidation IS epithermal deposits the full range of

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  • Sulfidation State of Fluids in Active and Extinct

    In highsulfidation HS epithermal deposits the sulfidation state ranges from high for copperrich enargitebearing assemblages to intermediate for the later goldrich tennantitetetrahedrite + pyrite assemblages, with similarities to and overlap with the basemetal veins. In intermediate sulfidation IS epithermal deposits the full range of intermediate sulfidation states is represented by the

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  • HYPOGENE ALTERATION, SULFIDE MINERALOGY, AND METAL

    highsulfidation epithermal deposit is displayed laterally from the cogenetic porphyry system of Far Southeast in the Mankayan district, Philippines Arribas et al., 1995a. This study returns to investigating alterationmineralization at Cerro Yanacocha. The deposits at Cerro Yanacocha formed in the final, fifth stage of hydrothermal activity

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  • PorphyryEpithermal Transition: Maricunga Belt, Northern Chile

    Transitions between porphyry copper deposits and highsulfidation epithermal gold deposits also have been proposed Sillitoe, 1973, 1983, 1988, 1989; Wallace, 1979; Heald et al., 1987; Rye, 1993, and recent studies of the Lepanto highsulfidation goldcopper and adjacent Far Southeast porphyry coppergold deposits Arribas et al., 1995

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  • Sulfidationan overviewScienceDirect Topics

    By analogy with the giant highsulfidation deposit at Monywa Fig. 9.9, copper potential in the PopaLoimye arc is widely believed to be confined to the Miocene volcanic rocks and to Oligocene intrusions known only at Shangalon Fig. 9.6, on the understanding that most of the Kanzachaung batholith Figs. 9.2 and 9.5 is Cretaceous and too

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  • High Sulfidation Alteration at the Island Copper Porphyry

    Alteration and mineralisation at the Island Copper deposit is related to the intrusion of Early Jurassic quartz feldspar porphyry dykes into surrounding comagmatic Bonanza volcanic rocks. The pyrophyllite alteration zone forms an upward flaring cone, largely hosted within a breccia body that c rosscuts the Cu, Mo, and Aurich ore shell. This alteration zone contains

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  • 2.2 Porphyryepithermal mineral systemGeoscience Australia

    Adulariasericite AuAg or low sulfidation 2 and AgZnPb intermediate sulfidation epithermal deposits are located schematically in the low temperature, periphery of the mineral system, with porphyry CuAuMo and pyrophyllitekaolinite high sulfidation or acidsulfate AuCu epithermal systems more proximal to intrusive bodies. Skarn

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  • The Mt Carlton highsulfidation epithermal deposit, NE

    Highsulfidation epithermal HS deposits occur in volcanic arc settings around the world. These deposits are soughtafter by mining companies due to their endowment in precious and base metals, and due to their genetic connection to porphyry copper deposits. The aim of this thesis is to enhance our understanding of HS deposits and how to explore for them.

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  • The Lepanto CuAu deposit, Philippines: A fossil

    Hyperacidic lakes and associated solfatara in active volcanoes are the expression of magmatic gas expansion from source to surface. Here we show for the first time, that the vein system that comprises the ~ 2 Ma highsulfidation, Lepanto coppergold deposit in the Mankayan district Philippines was associated with a contemporary hyperacidic volcanic lake complexpossibly the first such

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  • High Sulfidation Alteration at the Island Copper Porphyry

    The pyrophyllite alteration zone forms an upward flaring cone, largely hosted within a breccia body that c rosscuts the Cu, Mo, and Aurich ore shell. This alteration zone contains pyrophyllite, dumortierite and diaspore and resembles alteration occurring in some highsulfidation deposits, but which is barren.

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  • HighSulphidation Deposits of GoldGeology In

    Highsulphidation deposits result from fluids dominantly gases such as SO2, HF, HCl channeled directly from a hot magma. The fluids interact with groundwater and form strong acids. These acids rot and dissolve the surrounding rock leaving only silica behind, often in a

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  • Porphyry Copper Assessment of Mexico

    Nov 01, 2010· This assessment estimates that 39 undiscovered deposits contain an arithmetic mean estimate of ~144 million metric tons of copper or more in ten tracts for which probabilistic estimates were made, in addition to 21 porphyry copper deposits that contain identified resources of ~52 million metric tons of copper.

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  • HYPOGENE ALTERATION, SULFIDE MINERALOGY, AND METAL

    highsulfidation epithermal deposit is displayed laterally from the cogenetic porphyry system of Far Southeast in the Mankayan district, Philippines Arribas et al., 1995a. This study returns to investigating alterationmineralization at Cerro Yanacocha. The deposits at Cerro Yanacocha formed in the final, fifth stage of hydrothermal activity

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  • Sulfidationan overviewScienceDirect Topics

    By analogy with the giant highsulfidation deposit at Monywa Fig. 9.9, copper potential in the PopaLoimye arc is widely believed to be confined to the Miocene volcanic rocks and to Oligocene intrusions known only at Shangalon Fig. 9.6, on the understanding that most of the Kanzachaung batholith Figs. 9.2 and 9.5 is Cretaceous and too

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  • CHARACTERISTICS OF HIGHSULFIDATION EPITHERMAL

    Highsulfidation deposits form in a position intermediate between intrusions and the surface; therefore, they may be located close to a porphyry copper deposit or in a nearsurface environment, such as the roots of an acid crater lake. Comprehensive genetic models for HS deposits have been proposed only recently e.g.,

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  • Lithocaps and highsulfidation epithermal deposits

    Lithocaps and highsulfidation epithermal depositsIwato HS deposit, Maruyama pit Inset: qtzalun halo, sharp ctc with vuggy qtz, to r. Urashima et al., 1981 Tuff breccia Nansatsu Group Iwato, Arabira rebody: Structural control to alteration and ore in feeders

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  • High Sulfidation Epithermal DepositsSpectral Evolution

    High sulfidation epithermal deposits are created by fluids from hot magma. Rocks that come in contact with the fluids are altered and a definable zone formed. These alteration zones as they move away from the core are characterized by the following mineral assemblages: alunite, pyrophyllite, kaolinite, illite, and chlorite rich clays.

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  • Lithocaps and highsulfidation epithermal deposits

    Lithocaps and highsulfidation epithermal depositsIwato HS deposit, Maruyama pit Inset: qtzalun halo, sharp ctc with vuggy qtz, to r. Urashima et al., 1981 Tuff breccia Nansatsu Group Iwato, Arabira rebody: Structural control to alteration and ore in feeders

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  • PDF High Sulphidation Gold DepositsA Summary

    High sulphidation gold systems are a unique and increasingly important type of mineral deposit. These systems are formed within a vertical continuum from shallow epithermal environments to the

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  • Geology of the High Sulfidation Copper Deposits, Monywa

    The 50 km 2 Monywa copper district lies near the Chindwin River within the northward continuation of the SundaAndaman magmatic arc through western Myanmar. There are four deposits; Sabetaung, Sabetaung South, Kyisintaung, and the much larger Letpadaung 7 km to the southeast. Following exploration drilling which began in 1959, production of copper concentrates from a small open pit

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  • Epithermal Gold DepositsGeology for Investors

    Oct 17, 2019· Epithermal gold deposits are among the richest gold deposits in the world with some bonanza grade ore shoots containing more than 1000 g/t gold, or in other words, a kilogram of gold for every tonne of rock mined. Unfortunately, the tonnage of ore in epithermal veins is typically small compared with other types of lower grade gold deposits. Gold mineralisation within epithermal veins

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  • GeologyOrla Mining Ltd.

    Clusters of highsulfidation epithermal prospects and deposits containing gold and copper mineralization are hosted by advanced argillicaltered volcanic rocks. Districtscale alteration extends along a WNW trend for >10 kilometres within the limits of Orlas 14,833 hectare concession.

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  • High Sulfidation Epithermal DepositsSpectral Evolution

    High sulfidation epithermal deposits are created by fluids from hot magma. Rocks that come in contact with the fluids are altered and a definable zone formed. These alteration zones as they move away from the core are characterized by the following mineral assemblages: alunite, pyrophyllite, kaolinite, illite, and chlorite rich clays.

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  • Geology of the Josemaría Porphyry CopperGold Deposit

    After concealment of the Josemaría deposit beneath the postmineral volcanosedimentary cover, advanced argillic alteration and minor highsulfidation copper mineralization affected mainly the area south and southeast of the deposit Figs. 5, 7b, 10d, 11e. The event has not yet been radiometrically dated but must be >~2.4 m.y. later than

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  • INTERNATIONAL EXCHANGE LECTUREJUNE 1994 High

    Aug 20, 2014· the idea that highsulfidation epithermal deposits have a magmatic fingerprint and that some are closely linked to deeper porphyry systems The present conceptual model that ties porphyries with highsulfidation epithermal systems in contrast with highsulfidation copper lodes, based on the studies cited above, is paraphrased here

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  • Geology of the High Sulfidation Copper Deposits, Monywa

    The Monywa highsulphidation copper deposit is located 150 km NW of Mandalay in Central Myanmar and is one of the largest copper resources in mainland SE Asia, with 7 Mt of contained copper

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  • Geology of the High Sulfidation Copper Deposits, Monywa

    The 50 km 2 Monywa copper district lies near the Chindwin River within the northward continuation of the SundaAndaman magmatic arc through western Myanmar. There are four deposits; Sabetaung, Sabetaung South, Kyisintaung, and the much larger Letpadaung 7 km to the southeast. Following exploration drilling which began in 1959, production of copper concentrates from a small open pit

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  • Porphyry copper depositWikipedia

    Porphyry copper deposits are copper ore bodies that are formed from hydrothermal fluids that originate from a voluminous magma chamber several kilometers below the deposit itself. Predating or associated with those fluids are vertical dikes of porphyritic intrusive rocks from which this deposit type derives its name. In later stages, circulating meteoric fluids may interact with the magmatic

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  • Copper isotopic signature of the Tiegelongnan high

    Abstract We report the copper isotopic composition of Cu sulfides in the Tiegelongnan highsulfidation HS copper deposit, Tibet, and investigate the possible application of Cu isotopestomineralexploration.Thecopperisotopicvaluesof samples from four drill holes display consistent progressive increase with depth to 400 m below surface, with an

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