 | | Journal (article/letter/editorial) | | Porphyry Gold-Copper Deposit, Maricunga Belt, Northern Chile* RICHARD H. SILLITOE,1,† JUSTIN TOLMAN,2,** AND...the Maricunga gold-silver-copper belt of northern Chile, was discovered in 2007 beneath postmineral cover...mineralization is centered on a composite diorite to quartz diorite porphyry stock, within which five outward-younging...and 0.4% Cu. The subsequent porphyry phases are quartz dioritic in composition and characterized by progressively...mineralization in the lower half of the deposit accompanies quartz ± magnetite-veined, potassic-altered rocks, whereas |  | Sillitoe, Richard H., Devine, Fionnuala A.M., Sanguinetti, Martin I., Friedman, Richard M. (2019) Geology of the Josemaría Porphyry Copper-Gold Deposit, Argentina: Formation, Exhumation, and Burial in Two Million Years. Economic Geology, 114 (3) 407-426 doi:10.5382/econgeo.4645 | Journal (article/letter/editorial) | | located in the Frontal Cordillera of San Juan Province, Argentina, near the present-day northern limit...Permian to Triassic age. The earlier, more intensely quartz ± magnetite-veined porphyry phases and contiguous... zones, from shallow advanced argillic (mainly quartz-pyrophyllite) and underlying sericitic to deeper...low-arsenic, high-sulfidation assemblage in the quartz-pyrophyllite and sericitic zones. The outermost...Cordillera of San Juan Province, Argentina, ~8 km east of the border with Chile (lat 28°26'S, long 69°32'W) |  | | Journal (article/letter/editorial) | | the Refugio District, Maricunga Belt, Northern Chile JOHN L. MUNTEAN†,* AND MARCO T. EINAUDI Department...are zoned in space from a deeper zone of banded quartz veinlets associated with chlorite-magnetite-albite...a shallow zone of pyrite-albite-clay and local quartz-alunite ledges. Pancho contains an additional,... deepest, porphyry copperlike zone, with quartz veinlets (A-veinlets) and potassic alteration. Relative...with minor quartz and chalcopyrite, and K feldspar alteration envelopes to sugary quartz veinlets <1 |  | | Journal (article/letter/editorial) | | ileLtda., AvenidaPedrode Valdivia295, Santiago,Chile AND RICHARD H. SILLITOE 27 WestHill Park,HighgateVillage...and 28 ø S in the Andean Cordillera of northern Chile. After 10 yearsof exploration,three preciousmetal...intermediateargillic type. Much of the gold is presentin quartz stockworks.Iron oxides,both early magnetiteandlate...quartzstockworksandadvanced argilliccapsare telescopedat Marte, Valy, SantaCecilia, andLa Pepabut are separatedby...gold-poor,polymetallicveinswith quartz-alunite selvagesat Aldebaran. Marte andLobo are rich in gold(1.43 |  | | Journal (article/letter/editorial) | | mineralization in the Atacama segment of the South American Andes, northern Chile (26°15'-27°25'S) Received:...magmatism and the rich ore deposits of northern Chile have been the focus of numerous studies. Significant...feature of the geology of this part of northern Chile is the existence of n o r t h - south to north-east-...alteration and cama segment - Andes - northern Chile mineralization (Baker and Guilbert, 1987; Colley...metallogenic belts Introduction (Fig. 1): (1) along the Atacama Fault System; (2) along the Inca de Oro Belt; (3) |  | | Journal (article/letter/editorial) | | Porphyry-Epithermal Transition: Maricunga Belt, Northern Chile JOHN L. MUNTEAN†,* AND MARCO T. EINAUDI Department...Pepa districts in the Maricunga belt of northern Chile contain advanced argillic alteration zones that...intrusive rocks. A-veinlets contain variable amounts of quartz, magnetite, biotite, and chalcopyrite and locally...and 0.1 to 0.4 percent hypogene copper. Banded quartz veinlets occur mostly above A-veinlets and cut...Data from rare liquid-rich inclusions in banded quartz veinlets indicate temperatures ≤350°C at pressures |  | | Journal (article/letter/editorial) | | Geochronologyof the Maricunga Gold-Silver Belt, Northern Chile RICHARD H. SILLITOE, 27 WestHill Park, HighgateVillage...ileLtda., AvenidaPedrode Valdivia295, Santiago,Chile Abstract The Maricungametallogenicbelt in northernChile...tersin the belt, includingthe La Coipa,La Pepa,Marte, andLobodeposits, weredatedradiometrically using...Reand 28 ø S in the Andean Cordillera of northern Chile at Aldebaran,gold-silverat (Fig. 1) at altitudesrangingfromabout4...during the initial stagesof, the subductionzone Marte porphyrygold deposit(Vila et al., 1991), the fl |  | | Journal (article/letter/editorial) | | Vol. 86, 1991, pp. 1187-1205 Gold Metallogeny of Chile RICHARD an Introduction H. SILLITOE 27 WestHill...s,includingnewly recognizedgold-onlyexamplesat Marte and Lobo, accompany quartzstockworks developedin...poorlymineralized. Paucityof golddepositsin the coastalzoneof Chile, concentration of highsulfidationand porphyry-typedepositsin...copper and silver enrichmentin northernand central Chile which took place during the Oligoceneand early Mioceneand...CHILEhasbeena modestgoldproducerfor the last central Chile (24o-37 ø S; Flores, 1942; Ruiz et al., fivecenturies |  | | Journal (article/letter/editorial) | | Geologic Evolution of the Escondida Area, Northern Chile: A Model for Spatial and Temporal Localization of...has been carried out over a 745-km2 area of the Atacama Desert surrounding the porphyry Cu deposits at...and Chimborazo (Cordillera de Domeyko, northern Chile). The purpose of this study was to examine the regional...throughout much of the porphyry belt of northern Chile. Geochemically, they are I-type in character, but...giant porphyry deposits. Introduction NORTHERN CHILE is the world’s premier porphyry copper district |  | | Journal (article/letter/editorial) | | east of the main Andean porphyry copper belt of Chile. The deposit consists of a composite stock of dacitic...weakly mineralized or barren porphyries. Intense quartz-magnetite (±K feldspar) alteration pervades the...feldspar-destructive alteration. The intensely quartz-magnetite veined sample of quartz-magnetite alteration indicates...and have a closely overlapping distribution on the mine scale. A well-developed ore shell coincides with...alteration and partly with the distribution of intense quartz ± magnetite veins, even though the bulk of the |  | | Journal (article/letter/editorial) | | east of the main Andean porphyry copper belt of Chile. The deposit consists of a composite stock of dacitic...weakly mineralized or barren porphyries. Intense quartz-magnetite (±K feldspar) alteration pervades the...feldspar-destructive alteration. The intensely quartz-magnetite veined sample of quartz-magnetite alteration indicates...and have a closely overlapping distribution on the mine scale. A well-developed ore shell coincides with...alteration and partly with the distribution of intense quartz ± magnetite veins, even though the bulk of the |  | | Journal (article/letter/editorial) | | Porphyry Gold Deposit at Marte, Northern Chile TOMkS VILA, Minera Anglo American Chile Ltda., Avenida Pedro...Pedro de Valdivia 295, Santiago,Chile RICHARD H. SILLITOE, 27 West Hill Park, Highgate Village, London N6...CopiapS,Chile AND ENRIQUEVITERI** Minera AngloAmericanChile Ltda., ChaKarcillo840, CopiapC,Chile Abstract...porphyrygolddeposithasbeendocumentedfor the firsttime at Marte in the Maricunga belt of the AndeanCordillera,northernChile...believedresponsiblefor introductionof muchof the veinlet quartz, magnetite,and gold. Chlorite-dominatedalteration |  | Oviedo, Luis, Fuster, Nicolas, Tschischow, Natasha, Ribba, Luis, Zuccone, Alvio, Grez, Enrique, Aguilar, Angelo (1991) General geology of La Coipa precious metal deposit, Atacama, Chile. Economic Geology, 86 (6) 1287-1300 doi:10.2113/gsecongeo.86.6.1287 | Journal (article/letter/editorial) | | Deposit, Atacama,Chile Luis OVIEDO, Los Quillayes191, Las Vertientes,SanJosdde Maipo, Chile NICOLAS...6651, Copiapd,Chile ENRIQUE GREZ, Goldfields,Chile, S.A.,CarmenSylva2449, Santiago,Chile AND ANGELO AGUILAR...AGUILAR Minera Homestake,Chile S.A.,Pedrode Valdivia 0193, 4 ø Piso,Santiago,Chile Abstract The La Coipaore...advancedargillicalteration(alunite-kaolinite ___ dickite-quartz) andsemitabular formsandare hostedmainlyby the...suchasLa Coipa (1980-1982), Esperanza (1981), Lobo-Marte (1982-1984), E1 The earliestwritteninformationaboutLa |  | | Journal (article/letter/editorial) | | Magmatic Evolution of the Maricunga Mineral Belt in Chile a b c Suzanne Mahlburg Kay , Constantino Mpodozis...y Mineria, Avenida Santa Maria 0104, Santiago, Chile c Department of Geological Sciences, Snee Hall...y Mineria, Avenida Santa Maria 0104, Santiago, Chile Version of record first published: 06 Jul 2010....Magmatic Evolution of the Maricunga Mineral Belt in Chile, International Geology Review, 36:12, 1079-1112...Magmatic Evolution of the Maricunga Mineral Belt in Chile SUZANNE MAHLBURG KAY, Department of Geological Sciences |  | | Journal (article/letter/editorial) | | MineraFMCLtda.,La Capitanfa163,LasCondes, Santiago, Chile Abstract The ParadisePeakgold-silver-mercury depositin...alsooverlyingandesitcflowsandfelsictuffs altered to a quartz-aluniteassemblage. A lower andesitcsequence,beneaththe...similarporphyrygolddepositsin the Maricunga belt, northern Chile. An episodeof detachmentfaultingaffectedthe Pa...'"' '"•-. '" •...•......'......'•..5.., '"'. ":" PROVINCE •' "q'""""'"'""'"'•..".......'_..'•.'.•:.•':....fault,whichplaces mineralizedtuff againstopalized quartz-feldspar porphyry(Fig. 5). The porphyryis consideredtentativelyto |  | | Journal (article/letter/editorial) | | of Northern Chile Preface FRANCISCO CAMUS † Codelco-Chile, Huérfanos 1270, Santiago, Chile AND JOHN H...University, Corvallis, Oregon 97331 Introduction Chile is known worldwide as the site of one of the largest...production of more than 50 Mt of fine copper. Currently, Chile annually produces about 4.6 Mt of fine copper that...exploration efforts in the Central Andes with emphasis in Chile. During the past 25 years, exploration expenditures...subject of research by numerous individuals in Chile and elsewhere. The support of mining companies has |  | | Journal (article/letter/editorial) | | Collahuasi, Chuquicamata, La Escondida, El Teniente, Chile) makes them valuable exploration targets. These...from Escondida, Zaldívar, and Chimborazo, northern Chile, and coeval regional diorite intrusions. Negative...to two log fO units above the fayalite-magnetite-quartz 2 buffer; Brandon and Draper, 1996) ensures that...example being the West Fissure zone of northern Chile, which hosts several of the world’s largest deposits...LA Ocean 22°S Lascar Antofagasta El 24°S Chile Pacific RO Zaldívar Chimborazo La Escondida |  | | Report (issue) | | DESCRIPTIVE/GENETIC SYNOPSIS: Au is present in a stockwork of quartz veinlets within subvolcanic diorite, tonalite,...Enrique Viteri, The porphyry gold deposit at Marte, northern Chile, Economic Geology Monograph 8, in press...by geologists at La Pepa, Alderberan, Marte and Lobo Mines, Chile. REGIONAL GEOLOGIC ATTRIBUTES TECTONIC...GANGUE MINERALOGY: Native gold and electrum in a quartz stockwork. Magnetite is commonly present. In sulfide...OF WEATHERING: Oxidation of sulfide minerals in quartz stockwork important in making low-grade ores amenable |  | | Journal (article/letter/editorial) | | of mineral deposits. Sixteen mining districts in Chile, and 24 in Argentina, were attributed to the seismically...zones roughly parallel to the axis of the Peru-Chile trench (Carachas-Portillo, Choquelimpie, Iquique...Ulriksen (1990) for the northern and central part of Chile and from Mapa Minero (1966) for the northwestern...information was obtained from Mapa GeoloÂgico de Chile (1982) and Mapa GeoloÂgico de la RepuÂblica Argentina...sections) perpendicular to the axis of the Peru±Chile trench, which enabled us to distinguish between |  | | Journal (issue) | | necesita hacer para fomentar la exploración minera en chile? TEMAS Desafíos para la industria Restricción de...A LA EDITORIAL TÉCNICA Y DE NEGOCIOS LÍDER DE CHILE R E V I S TA D E L A I N D U S T R I A M I...Peru: Copper production begins at Antapaccay The mine will produce an average of 160,000 tons a year of...The key role of engineering companies Estimates of mine investments through 2020 suggest a busy time for...EIS for El Morro will be finished” 50 Pirquitas Mine progresses in the completion of its production plan |  | | Journal (article/letter/editorial) | | feldspar–biotite–amphibole gneiss and porphyritic quartz monzodiorite. The deposit has been affected by...inclusions in six samples of copper-mineralized quartz veins record the presence of three different fluid...Norrbotten ore province Æ Sweden Introduction Aitik is Sweden’s largest copper mine and one of Europe’s...had been produced since mining began in 1968. The mine has a remaining reserve of 226 Mt of ore with an...of Gällivare, in the northern Norrbotten ore province (Fig. 1). Several other epigenetic copper–gold |  | | Journal (article/letter/editorial) | | mineralization occurs in a distinctive sequence of quartz-bearing veinlets as well as in disseminated form...central Chile; A.J. Wilson, writ. commun., 2009) and Mo (2.5 Mt: El Teniente, central Chile; Camus, 2003)...(Nena) Wafi-Golpu Gaby El Salvador Potrerillos Marte & Caspiche Taca Taca Bajo Bajo de la Alumbrera...to global-scale anomalies for Cu (e.g., northern Chile-southern Peru, southwestern North America) or Au...HI B AR C A 26° El Salvador Potrerillos COPIAPÓ ARGENTINA LA SERENA 30° Lineament Fault Porphyry |  | | Journal (article/letter/editorial) | | Porphyry Cu Magmatism in the EscondidaArea, Northern Chile* JEREMY P.RICHARDS? Department of EarthandAtmospheric...ized centers in theEscondida regionof northern Chile;alldatesarereported with errors.At theChimborazo...ion feldspar-biotite-quartz porphyry intrusion.At theZaldfvar porphyry Cu mine,zirconandbiotitehavebeenanalyzed...froma similarsynmineralizationfeldspar-biotite-quartz porphyry (theLlamoporphyry): thezirconU-Pbageis38...at 37.40ñ 0.18Ma.U-Pbdatingof twootherrhyolitic quartz-feldspar porphyry bodies thathostmuchoftheoreatZalclivar |  | Simón, Valeria, Arnosio, Marcelo, Trumbull, Robert B., Caffe, Pablo, Rocholl, Alexander, Sudo, Masafumi, Lucassen, Friedrich, Huidobro, Facundo (2021) Geology, geochemistry and geochronology of Lindero porphyry gold deposit in the Southern Puna plateau, Argentina. Journal of South American Earth Sciences, 105. 103047pp. doi:10.1016/j.jsames.2020.103047 | Journal (article/letter/editorial) | | K-feldspar + quartz + 37 calcite ± plagioclase), (ii) K-silicate (K-feldspar + quartz + magnetite ±...and scarce quartz 56 phenocrysts (40 to 55 vol. % of phenocrysts) in a K-feldspar ± quartz microcrystalline...porphyry gold deposits in the 69 Maricunga belt, Chile, and with the porphyry copper deposits of Argentina...porphyry copper deposits in the frontal-arc setting of Chile, notably by the lack 71 of an adakite-like signature...uncommon. They were defined in the Maricunga belt of Chile in the early 79 1980s (Vila et al., 1991; Vila |  | | Catalog/List | | piece. 1. GOLDEN BARYTE (9cm l 8cm l 7an) Meil:Je Mine, EU:o Co1U1ty, Nn-ada, USA Highly lusirou, brighl...matrix. Prcuy display specimen. £65 5. CALCITE & QUARTZ (10an l 7.5cm 14.5cm) UMlic, Romania Saddle shaped...growlhs wilh small calcilc scalcnohcdron encrusting quartz on a sulphide matrix. Very aunctive piece. £30...CINNABAR ON DOLOMITE (3.5cm l 3cm l Ian) Xowidlow Province. China Sleoder modified beugooal cochineal - red...ask for further details) L PREHNITE WITH SMOKY QUARTZ & FELDSPAR (San l 5cm l 4cm) Bromberg molUllains |
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