1). Most hydrothermal gold is associated with pyrite and arsenopyrite , but minor disseminated gold occurs without sulfides within variably sheared schist host rock. Fútbol. La siguiente es una lista de los estadios de fútbol de Suiza ordenados por capacidad de espectadores. The Miocene metallogenic belt of central and northern Peru, In: Skinner, B.J. Other sulfides are rare, and are identified only microscopically. Noble, D. and McKee, E., 1999. In 1842, the Geological Survey of Canada was formed to fulfill this request. http://bit.ly/1Yf2HKk Fluids during mineralization stages A, B1, B2, and C1 are the result of mixing Paco Paz Recommended for you. Low sulfidation-state chalcopyrite ± bornite assemblages are characteristic of potassic zones, whereas higher sulfidation-state sulfides are generated progressively upward in concert with temperature decline and the concomitant greater degrees of hydrolytic alteration, culminating in pyrite ± enargite ± covellite in the shallow parts of the lithocaps. emplaced at a paleodepth from <500 to 1,500 m: (1) pyrrhotite pipes grading outward to sphalerite and galena The Geological Survey of Canada (GSC; French: Commission géologique du Canada (CGC)) is a Canadian federal government agency responsible for performing geological surveys of the country, developing Canada's natural resources and protecting the environment. Late-stage alteration overprints may cause partial depletion or complete removal of Cu and Au, but metal concentration may also result. it (Peru), and thus to better understand the role of boron-rich fluids for the formation of major Sn deposits. Figueroa, O., Farfán, C., Fontboté, F., Bernaola, R., Espinoza, S. and Díaz, M., 2019. Molaviajar Recommended for … It shows several degrees of superimposition by the advanced argillic alteration. FANDOM. En, conformado por serpentina, talco, brucita, tremolita, 2/3 de la esfalerita de La Tapada con, promedio de 3.57% Zn sobre un recurso mayor a 5. y pH cercano a neutro (baja sulfuración). [2] The presentation match, against Valencia, was announced on 7 June following the announcement of a match against Club Brugge in Belgium three days earlier. Meteoric water is not required for formation of this alteration-mineralization sequence although its late ingress is commonplace. commun., 2019). El estadio de Nizhni Nóvgorod será el escenario del Suecia-República de Corea el próximo 18 de junio. The 2019–20 Sporting CP season was the club's 114th season in existence and 87th consecutive season in the top flight of Portuguese football. The specogna gold deposit: A late tertiary, low-sulfidation epithermal hot spring deposit, Graham Is... Short life-span of the ore-forming system at the Porgera gold deposit, Papua New Guinea: Laser 40Ar/... Re-Os systematics of sulfides (chalcopyrite, bornite, pyrite and pyrrhotite) from the Jiama Cu-Mo de... Conference: Proexplo2019, extended abstracts, p. 73-77. The Late Miocene Santa Bárbara Cu-Au porphyry deposit is located 2 km NE of the old Carhuacayán mine and 3.5 km N-W of the town Santa Bárbara de Carhuacayán (Figueroa et al., 2019). Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. significantly different mineral assemblages that are rather controlled by changing fO2, pH, fS2, and temperature. Less commonly, intermediatesulfidation epithermal mineralization, chiefly veins, may develop on the peripheries of the lithocaps. Loss, On 29 April 2019, Sporting announced the first pre-season plans, including two matches in Switzerland as well as an unprecedented match against Liverpool in New York. (2008) reported an age of 8.2 ± 0.18 Ma (Ar-Ar from biotite) for a dacite dome in Carhuacayan (probably our DP) and Noble and McKee (1999) reported an age of 7.8 ± 0.2 Ma (K-Ar) from alunite, probably from a lithocap at the QFP. Juegos Películas TV. A direct correlation between fluid composition recorded in the studied fluid evento permiten determinar que su emplazamiento, brechas intrusivas. Resúmenes proEXPLO 2019, 4 p. metallogenic belt of central and northern Peru, In: They are straight and sinuous, and are all cut by type A, B, and D. Resúmenes proEXPLO 2019. Its western extent is bounded by the Sandspit fault. between Cerro de Pasco and Huancayo; Lats. The early porphyry EP contains more than 5% up to 10-cm-wide straight and sinuous "A" type veinlets with saccharoidal texture and that cut each other. Left the club halfway through the season. Four intrusive phases have been recognized in the late Miocene Santa Bárbara Cu-Au porphyry deposit through examination of veinlet types and other fabric features. Estadios. ALGUNAS TEORÍAS. interaction with the moderate-salinity, metal-rich magmatic fluids has been registered in stage C2. Mineralization of altered wallrock is dominated by 1% to 4% auriferous pyrite and marcasite. Gold-bearing mineralised faults in Caples Terrane rocks were controlled by a prominent set of late metamorphic joints that strike north-west. Stage C is formed by sets of subvertical veinlets, veins, and breccias crosscuting the previous stages and striking NE-SW, subordinately NW-SE; the width of these veins varies from 0.5 cm to 1.2 m showing comb and crustiform textures. No Cyclic dilution of magmatic metal-rich hypersaline fluids by magmatic low-salinity fluid: a major process generating the giant epithermal polymetallic deposit of Cerro de Pasco, Peru. Chalcopyrite and minor contents of bornite occur scattered in all veinlets and in the matrix in a ratio of 3:1. In the polymetallic mineralization, three stages have been distinguished (Bernaola et al. [1] After Aylesworth Perry was appointed as acting librarian in 1881 he prepared the catalogue of reference works on geology, mineralogy, metallurgy, chemistry and natural history. Geological and hydrothermal alteration map of the Santa Bárbara Cu-Au porphyry deposit. Sergio Ramos, uno de los hombres más experimentados del elenco ibérico, desperdició dos penales que fueron bien atajados por el arquero suizo Sommer. Anglo Peruana Terra S.A., Monte Grande 129, (aproximadamente 2 Mt de mineral de Ag, Zn. Local high Au grades up to 9.36 g/t found in B stage pyrite aggregates are attributed to stage C. The presence of fahlore, kaolinite, illite, and Ca-Mg-Fe-Mn carbonates indicate intermediate-sulfidation conditions. All rights reserved. These are formed in an 800 m long zone that roughly parallels the Sandspit fault. El St. Jakob-Park, en Basilea, es el estadio con mayor capacidad de espectadores del país, con 38.512. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Pirita reemplazando manto de estadío A. DDHTPD17007 a 475.8 m @ 0.5 g/t Au, 0.6 Oz Ag, 0.0 % Pb, 4.1 % Zn, 0.1 % Cu sobre 1.7 m. Abreviaturas: py = pirita, sl = esfalerita, mt = magnetita. In contrast, similar gold-bearing mineralised faults in Torlesse Terrane rocks were mainly controlled by west-striking joints. Stage A consists of replacement bodies subparallel to bedding, emplaced mainly on limestones. Mineralization stages in the La Tapada, Carhuacayán Cordilleran polymetallic deposit, Central Peru: its application to resources modelling and delineation of new exploration targets. As of this date, Scribd will manage your SlideShare account and any content you may have on SlideShare, and Scribd's General Terms of Use and Privacy Policy will apply. The time-space distribution of Eocene to Miocene magmatism in the central Peruvian polymetallic province and its metallogenetic implications: Journal of South American Earth Sciences, v. 26, p. 16-35. Depending location, below elevations between 3,950 and 4,050 m, it can be observed that at the contact of the early porphyry EP with the intermineral porphyries the grades drop sharply (Fig. Figueroa, O., Farfán, C., Fontboté, F., Bernaola, The porphyry Cu mineralization occurs in a distinctive sequence of quartz-bearing veinlets as well as in disseminated form in the altered rock between them. Exploración bajo un lithocap en el pórfido Au-Cu Santa Bárbara, Carhuacayán - Franja miocénica en el Perú Central: Importancia del reconocimiento de distintas fases intrusivas. Bernaola, R., Espinoza, S., Díaz, M., Figueroa, O., Farfán, C. y Fontboté, L., 2019. bajo un lithocap en el pórfido Au-Cu Santa Fig. ∼10.2–12°S) and east of the Cordillera Occidental is represented by scattered shallow-level intrusions as well as subaerial domes and volcanic deposits. Ullevi: 43.200: … or longer. Brechas freáticas, subverticales cortan la brecha intrusiva (Figura 2, ligeramente posterior a esta última edad. epithermal polymetallic mineralization has formed in the shallow part of a porphyry system. 1) showing geology, hydrothermal alteration and ore grades in selected DDH. Early EP, intermineral IMP1, and IMP2 porphyries as well as a late porphyry LP of quartz monzonitic (Fig. Minera S.A.A. Fluid inclusions are two phase (L + V), homogenize to liquid at moderate temperatures (~220°–280°C in stages This estimation takes into account that ore grades are low in the upper part of the deposit owing to overprinting by advanced argillic alteration favored by telescoping. The similarity between fluid compositions and evolution during stages A, B1, B2, and C1 contrasts with their This project aims to use the chemical and isotopic signature of tourmaline in order to unravel the fluid processes during the magmatic-hydrothermal transition at the world-class San Rafael Sn depos, ABSTRACT The Antakori project (Regulus Resources Inc.) is located 50 km northwest of the city of Cajamarca and is part of the Miocene cluster of Cu-Au-Ag deposits of northern Peru. The QFP contains low-grade Cu (chalcopyrite > bornite) and Au mineralization. They have very low ratios of 187Os to common Os (0.09–0.55), therefore, they are different from low-level highly radiogenic (LLHR) sulfides. Source: Liga Portugal. At La Tapada, they trace the transition from low to intermediate sulfidation conditions in the hydrothermal fluid. distintas fases intrusivas. The moderate-salinity metal-rich magmatic fluid cannot be interpreted as an evolved intermediate-density fluid Bernaola, R., Espinoza, S., Diaz, M., Figueroa, O., Farfán, C., and Fontboté, L., 2019. This study is the first attempt to use the Re–Os isotope system to directly date chalcopyrite, bornite, pyrite and pyrrhotite at Jiama. Looks like you’ve clipped this slide to already. Esta página se editó por última vez el 26 may 2020 a las 01:26. El St. Jakob-Park, en Basilea, es el estadio con mayor capacidad de espectadores del país, con 38.512. It displays locally strong and well-preserved potassic alteration that is in most places overprinted by sericitic alteration. [2] One of the prominent cartographers and the chief topographical draughtsman was Robert Barlow, who began his work in 1855. [3] George Mercer Dawson became a staff member in 1875, progressed to assistant director in 1883 and finally to director of the Geological Survey of Canada in 1895. has been exploring the area. In distal parts and in thin late dikes that cut the early and intermineral porphyries, propylitic alteration rocks occur. En intersecciones con, parches del estadío C. Las estructuras, con rangos, alta razón As/Sb y contenidos de plata, además de. fractures and faults strike WNW-ESE, W-E, and NE-SW. Learn more. The discrimination of the three mineralization stages A, B, and C at La Tapada has allowed a more accurate resource modelling, including geometallurgical implications. Once the plutonic magmas stagnate, the high-temperature, generally two-phase hypersaline liquid and vapor responsible for the potassic alteration and contained mineralization at depth and early overlying advanced argillic alteration, respectively, gives way, at <350°C, to a single-phase, low- to moderatesalinity liquid that causes the sericite-chlorite and sericitic alteration and associated mineralization. 2019. Many features of porphyry Cu systems at all scales need to be taken into account during planning and execution of base and precious metal exploration programs in magmatic arc settings.
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