 | | Journal (article/letter/editorial) | | sulfide mineralization is present in the Julcani mining district, Peru, as fracture fillings in Tertiary volcanics...are used to determinemetal ratios throughoutthe district. The changesin metal ratios are large and systematic...mineralizing solutions. In the southeast.ernpart of the district, Herminia-Lucrecia, ratios change systematicallyaway...changesin three other mineralized areas of the district indicate general domal zoning. In general,Pb/Cu...as are determinedthroughoutthe Julcanimining district, Peru, usingmetalcontentdata available' from seen'by |  | | Journal (article/letter/editorial) | | DC 20013 pohwatp@si.edu ENARGITE Longfellow Mine, Red Mountain District, San Juan County, Colorado...group is the subject of this column—enargite. The name enargite is derived from the Greek έναργ ής...(001). Enargite also occurs in granular or massive habits. One of the characteristics of enargite crystals...are the striations along prism faces. Although enargite has perfect {110} cleavage, it also has distinct...indistinct cleavage. Twinning is common on {320}, and enargite may occur as interpenetrating trillings having |  | | Catalog/List | | good stuff that used to come out of the Marencl mine, ~ut the price is a whole lot better. specimens...00 eaoh. CLEANED COPPER AND MALACHITE: Southwest Mine, Bisbee, Arizona: I've had these for a few years...it! $4.00 each ENARGITE, BOURNONITE, PYRITE, GALENA, SPHALERITE: Various localities, Peru: Check out our...spent the past three years living and working in Peru and had just moved back with all the goodies he...juat collected this spring immediately before the mine was closed for refilling and reolalmlng. There will |  | | Journal (issue) | | TSKnerals of i'eru ! Indian miner, Cerro de Pasco, Peru, 1869 (Simonin, 1869). J3E(mes and J3E(merals...crystal group, 7 cm, from the Huanzala mine, Dos de Mayo Province, Peru. Marty Zinn collection; Jeff Scovil............................... History of Peru Mining in Peru The Mineral Specimen Business C o l l e c....................... Quiruvilca district, Santiago de Chuco province, department of La Libertad PASTO.......................... Pasto Bueno district, Pallasca province, department of Ancash R a u r a -H u |  | | Journal (article/letter/editorial) | | pp. 931-949 Geologyof theJulcaniMiningDistrict,Peru I,JLRICHPETERSEN, DONAnDC. NOBLE.MARIOJ. ARENAS...(Ag-Bi-Pb-Cu-W-Au) mineralizationat the Julcanidistrict, central Peru, is geneticallyrelatedto a geologicallybrief pulseof...detailedmetal ratio contouring.The central part of the district, characterized by the pyritic gold-tungstenmineralization...system. Along these paths they depositedfirst enargite-pyrite-tennantite/tetrahedrite, then a zone of...considerably in guiding exploration and development of Julcani, alloxvinga marked increasein ore reserves,as well |  | | Report (issue) | | metal-bearing, epithermal deposits of Mexico and Peru by Nora K. Foley Open File Report 84-633 This...districts Guanajuato District, Guanajuato, Mexico References Geologic map of Guanojuato District, Mexico Pachuca-Real...del Monte District, Hidalgo, Mexico References Geologic map of Pachuca-Real del Monte District, Mexico...Colqui District, Lima, Peru References Geologic map of Colqui District, Peru Julcani District, Huancavelica...Huancavelica, Peru References Geologic map of Julcani District, Peru 1 2 3 4 4 10 11 12 16 18 19 24 25 26 |  | | Journal (article/letter/editorial) | | and Ag-sulphosalts in a zoned ore deposit, Julcani, Peru R. O. SACK1,* 1 2 AND P. C. GOODELL2 Department...ABSTR ACT The sulphide ores from the Julcani mining district (Peru) display many retrograde reactions that...[~(Cu,Ag)10(Zn,Fe)2(Sb,As)4S13] from the Herminia mine exhibit pronounced downstream enrichments in molar...retrograde reactions, Julcani District, Peru. Introduction THE Julcani mining district in Peru is located in...in the Angaraes province, Department of Huanacavelica, ~250 km SE of Lima (Fig. 1). It is a major mining |  | | Journal (article/letter/editorial) | | Reconnaissanceof the Tetrahedrite-Tennantite/ Enargite-Famatinite PhaseRelationsasa Possible Geothermometer...antimonybetweencoexistingtetrahedritetennantiteand enargite or famatinite is a function of temperature. Preliminary...synthesesof coexisting tetrahedrite-tennantiteand enargite or famatinite were carried out at 500øC and 400øC...tie lines between tetrahe- drite-tennantiteand enargite or famatinite are very nearly colinear with sulfur...systemCuaAs-CuaSb-S. With decreasingtemperature,a given enargite coexistswith increasingly more antimonian tet |  | | Journal (article/letter/editorial) | | ANTIMONY, AND CARBONACEOUS MATERIAL AT THE HUANCAVELICA DISTRICT, PERU DONALD C. NOBLE Mackay Schoolof Mines...PerubarS.A., Juande Arona 830, SanIsidro, Lima 18, Peru Introductionand GeologicSetting native mercury...assemblageoccursmainly as impregnations of the district have been describedby Yates et al. in the quartzite...re presentin surmine, the mostimportantin the district (Fig. 1), is roundingareas.Pyrite and tetrahedriteare...COMM UNICA TIONS NORTH pErU/y •'• MO•ELOHUA¾CO \ x' SANTABARBARA MINE ChaclatoconoOpen Pi• D |  | | Journal (article/letter/editorial) | | 1924-1938 The MagmaticHydrothermalSystemat Julcani,Peru' Evidencefrom Fluid InclusionsandHydrogenand...generalsuccessionof quartz+ pyrite + wolfamite-,enargite-,tetrahedrite-,galena-,andbarite-dominant assemblages...ofinclusion fluids inlater main-stage wolframite,enargite,tetrahedrite,andgalenaandlate-stagesideriteshowa...died in an automobileaccidentnear Cerro de Pasco,Peru,onJuly13, 1994. JeffwasbornDecember3, 1957, in Oakland...-1554.00 1924 MAGMATICHYDROTHERMALSYSTEM,JULCANI,PERU 1925 hadreturnedto field-orientedstudies,in |  | | Journal (article/letter/editorial) | | GEOLOGY AND MAJOR ORE DEPOSITS OF CENTRAL ULRICH PERU PETERSEN CONTENTS PAGE Abstract ..............the center of the districts to the margins. This district zoning is modifiedby local or orebodyzoning and...complexenterprise,includingthe Goyllarisquizga coal mine, concentrating, smelting,and refiningfacilitiesand...observations and ideas. MAJOR ORE DEPOSITS OF CENTRAL PERU 409 General summariesare presentedby McLaughlin...ßO0•A BASILIA YAURIOOCHA LOCATION CENTRAL 50 MAP PERU 0 50 •ILOM[T[RS ß Fro. 1. Locationmap. GASTROVlRREYNA |  | | Journal (article/letter/editorial) | | Systemin Bismuthinite-Stibnite Compositions. Julcani,Peru VIRGIL W. LUETH, Departmentof PhysicalSciences...alongits path. Zoningpatternsestablished at Julcani,Huancavelica, Peru. Metal zoningis com- at Julcaniare presentedin... on metal ratios. 1462 ENCODINGORESYSTEM, JULCANI,PERU 1463 LOG (Pb/Cu) FIG. 2. Map projectionsummarizinglog...Metal ratio map of the 360 level of the Herminia mine showinglocationof major veins. Dotted linesrepresentlogPb/Cu...ORESYSTEM, JULCANI, PERU 330 0 1465 LEVEL lOOm FIG. 5. Vertical sectionof the Herminia mine with a map |  | | Journal (article/letter/editorial) | | chalcopyrite, galena, acanthite, sternbergite, enargite, bornite, covellite, calcite, dolomite, siderite...graphic granite. Pseudomorphs of tennantite after enargite are common. Pseudomorphs of pitticite (an amorphous...tennantite crystals with quartz from the El Cobre mine, Concepción del Oro, Zacatecas, Mexico. Cal and...exceptional 9-cm tennantite specimen from the Longfellow mine, Red Mountain Pass, Ouray County, Colorado. Dave...fingers black if handled carelessly. The Georgetown district, also in Clear Creek County, has produced some |  | | Journal (article/letter/editorial) | | ag e of the Cerro de Pasco Cu-Zn-Pb-Ag deposit, Peru E.S. Cheney * Department of Geology, Rand AfrikaansUniversity...world-famous Cu-Zn-Pb-Ag deposit at Cerro de Pasco, Peru, consists of texturally massive pyrite, texturally...sphalerite-galena-pyrite, and veins containing pyrite and enargite. Historically the deposit has been considered...Longitudinal fault, one of the largest faults in the district, but the Vent is not. Imbrication by the Longitudinal...is amenable to openpit mining. Dikes and pyrite-enargite veins pass from the Vent into the massive sulfides; |  | | Journal (issue) | | .89 by W. E. Wilson The Palomo mine, Huancavelica Department, Peru . . . . . . . . . . . . . . . . .... . .95 by J. Hyršl Pseudomorphs from Peru . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....White Ca-Mg-Fe-rich rhodonite from the Morro da Mina mine, Conselheiro Lafaiete, Minas Gerais, Brazil . ....BaCa2(CO3)2F2, a new mineral species from the Kirovskii mine, Khibiny, Kola Peninsula, Russia . . . . . . . ...crystal cluster, 3.5 cm, from the Mashamba West mine, atanga, Republic of the Congo. Rob Lavinsky (The |  | | Journal (article/letter/editorial) | | Tourmalinized Fluidization Breccia, JulcaniDistrict, Peru JOHNP. SHELNUTT* Departmentof Geologyand GeologicalEngineering...quartz-alunite-pyriteand argillic alterationstagesand economic enargite-tetrahedrite mineralization,exhibita crudebut...plutoncrystallizing beneaththe centralpart of the district. Areallyrestrictedelongatezonesof shattereddacitepostdatethe...describesfiuidizationbrecciasat the Julcanidistrict,Peru. A majorpurposeof the study wasto provideevidencefor...to underlie the district. The Julcanidistrictis locatedin the centralAndes of Peru approximately250 |  | Heald-Wetlaufer, Pamela, Hayba, Daniel O., Foley, Nora K., Goss, J.A. (1983) Comparative anatomy of epithermal precious- and base-metal districts hosted by volcanic rocks: A talk presented at the GAC/MSC/GGU Joint Annual Meeting, May 11-13, 1983, Victoria, British Columbia. Open-File Report Vol. 1983 (83-710) US Geological Survey doi:10.3133/ofr83710 | Report (issue) | | precious and base metals 9 Ore from the Creede district, Col. 10 Typical alteration zoning for the highly...deposition. 16 6 180-6D diagram for the Creede district, Col. (modified from Bethke and Rye, 1979). 1...from fluid inclusion studies for the Colqui district, Peru (from Kamilli and Ohmoto, 1977). 19 Temperature...fluid inclusion studies for the Sunnyside mine, Eureka district, Col. (modified from Casadevall and Ohmoto...geochemical data. Two of the districts are located in Peru, two in Mexico and the remaining 11 in the western |  | | Report (issue) | | Geological Survey, Reston, Va.; V. Raul Eyzaguirre, Lima, Peru; Fernando Urquidi B., American Embassy, La Paz,...Argentina, western Boliva, northern Chile, and southern Peru, are potential targets for hydrothermal mineral...volcanism in the central Andean region of southern Peru, northern Chile, western Bolivia, and northwestern...investigations. 1 76" 68' 72° \ 12° 12° PERU Macusani > 16' ijj®...(1984 and the Institute de Geologia y Vh'neria del Peru (1975). 1A Although many papers about the young |  | | Report (issue) | | steam-heated environments, such as those at the Tolfa district, Italy and Marysvale, Utah, and numerous modern...epithermal deposits such as Summitville, Colorado; Julcani, Peru and Red Mountain, Lake City, Colorado are characterized...alunite, and zunyite, and later gold, pyrite and enargite. Acidsulfate alteration assemblages also occur...Arribas, Jr., currently studying the Rodalquilar district in Spain as part his Ph. D. program, and Jeff...recently completed a Ph. D. dissertation on Julcani, Peru each conducted the stable isotope portion of |  | | Report (issue) | | fine-grained, massive, intimately intergrown with enargite. Twinning: Common on {112}, also polysynthetic...deduction of 0.97% insol. and 0.56% pyrite. (2) Huaron, Peru; by electron microprobe. (3) Cu3 AsS4 . Polymorphism...Polymorphism & Series: Mineral Group: Dimorphous with enargite; forms a series with famatinite. Stannite group...formed at low to medium temperatures. Association: Enargite, tetrahedrite–tennantite, colusite, stannoidite...the Lepanto mine, Mankayan, Luzon, Philippines [TL], as an ore mineral. In the Chinkuashi mine, Keelung |  | | Journal (article/letter/editorial) | | beneaththeir summitregions(Fig. 1). Gold-bearing enargite mineralizationis characteristicallyassociatedwith...Guinea(Sillitoeet al., 1984; seebelow), and possiblyalsoat Julcani(Petersen et al., 1977) and San Crist6balde Lipez...(Jacobson et al., placement,althoughlocally,asat Julcani(Petersen et al., 1977), Divide (Bonhamand Garside...springsinters(Fig.2), asat Delamar(Pansze, the Divide district(Bonham and istic of Summitville (Perkins and Nieman...sigsaline fluid inclusions,and other features at Julcani nificantlyyoungerandgeneticallyunrelatedto the |  | | Journal (article/letter/editorial) | | phasesare depositedprogressively farther from the district center (Stoces,1934; Park, 1955; Barnes, Base...Assemblages deposits, such as Quiruvilca and Julcani, suggest a Pasco,Peru, hasproducedmorethan 66 millionmettemporal...otherdeposits wardfroma highsulfur,Cu-richcore(enargite-pyrite (e.g., Butte, Main Tintic, and Yauricocha)the...-t- sericite tivity away from the center of the district (Petersen, Einaudi, 1982). and/oradvancedargi...zones in base metal lodes enargite-pyriteveins, tennantite replaces enargite typically expandoutwardwith |  | | Journal (article/letter/editorial) | | Metal Ratiosof the Quiruvilca Mining District, Northern Peru PAULJ. BARTOS ASARCOInc., RockyMountai...generate too muchnoiseto discernsignificantpatterns. District-scale metalratiosof basemetallodedepositsshowconsiderable...Thisstudydealswiththe southern partof theQuiruvilcabasemetallode district(Coco-LuzAngelica area),whichis locatedapproximately...locatedapproximately 80 km eastof Trujillo in north-central Peru (Fig. 1). Detailsof the districtandregionalgeologyare...districtresembles other basemetal lodessuchasJulcani,Peru (Petersenet al., 1977); CentralCity, Colorado(Simsand |  | | Journal (issue) | | except the Dale Beck Valley, Dry Gill and Carrock End Mine. Grahamis hoping to get the permit system properly...still very much a 'frontier place'. One supposed mine was started by a character called Otto van Stryk...Stryk who thought he had found a huge iron mine. Alas, he never got any useable ore out of it. Rick went... So now it is recognised as a potential uranium mine! Another anecdote involved a light plane brought...amethyst, fluorapatite and tourmalines. Rossinguranium mine, a uraniferous granite, was also mentioned. Rick |  | | Journal (issue) | | Sulfosalt Environment: The Mineralogy of the Julcani District, P e r u ............................................ 247 WULFENITE—from level 4 of the 79 mine, Gila County, Arizona. The specimen was collected...their help, and their country, where a change in mine ownership has also response has been wonderful....Individuals who have con sometimes meant a change in mine name. How many sented to serve as members of this... VIOLARITE FROM N IIH tlf A L u ■THE GAP NICKEL MINE by J. A. Speer and E. C. M artin Virginia Polytechnic |
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Julcani Mine, Julcani District, Angaraes Province, Huancavelica, Peru