 | | Report (chapter) | | the western U.S.A., Japan, the North Island of New Zealand, the Philippines, Fiji and Spain are described...vein deposit of epithermal type, about which much new information has recently become available. The term...chalcedony, accompanied by varying quantities of pyrite, calcite, dolomite, barite, adularia, rhodochrosite...is broadly coextensive with the Sierra Madre Occidental and the Trans-Mexico volcanic belt, but in the...along the central portion of the Sierra Madre Occidental, at least partly during volcanism, as attested |  | | Journal (article/letter/editorial) | | soils developed on a decantation bank from a copper mine Cerqueira B., Vega F.A., Silva L.F.O. & Andrade...Southland, New Zealand Ashley P., Craw D., Mackenzie D., Rombouts M. & Reay A., New Zealand Journal of...isotopic development of the Coromandel Volcanic Zone, northern New Zealand, since 18Ma Booden M.A., Smith...by-products on Cu, Zn, Pb and As leachability in a mine sediment Rodríguez-Jordá M.P., Garrido F. & García-González...Balcarka Cave and adjacent soils in the Moravian Karst region of the Czech Republic Faimon J., Ličbinská M. |  | | Journal (article/letter/editorial) | | Alteration and Mineralization in the Comstock District, Nevada DONALD M. HUDSON† 1540 Van Petten Street...metal deposits of the world-renowned Comstock district of western Nevada constitute one of several superimposed...superimposed Miocene hydrothermal systems. In the district, Mesozoic metasedimentary and igneous rocks are...kaolinite alteration exposed at the periphery of the district may be linked to preore alteration near the paleowater...elsewhere in the district. Pliocene to Holocene reactivation of faults has disrupted the district, redistributing |  | | Report (issue) | | States • • • ••• Australia • • • ••• • •• •• • New Zealand ••• ••• 0 • . •• • •• • .... • •• ••• ••...carry35576 A 3 6 ing metallic sulphides, especially pyrite ; often, also, as an impregnation of the country...California, and the west coast of the South Island of New Ze.a land. 1 ' r 7 • • The auriferous conglomerates...Hanson, Eng. Min. Journ., New Ybrk, 1920, 109, 194. The Mineral Industry, New York, 1919, 28, 295- 309...309, and 747- 794. Chem. and Met. Eng., New York, 1920, 22, 3-4. :it • 9 • remark, however, considerable |  | | Journal (article/letter/editorial) | | Newcastle, Callaghan, New South Wales, 2308, Australia; bGeological Survey of New South Wales, NSW Department...eastern margin of the Cobar Basin. Here we report 103 new sulfur isotope analyses, together with homogenisation...zones from the central area of the Cobar mining district. A range in d34S values from 3.8 to 11.2% (average...deposition and recrystallisation at the Chesney mine. Primary fluid inclusions in the first two stages...Introduction The Cobar Basin of central western New South Wales (Figure 1) is a major polymetallic mining |  | | Report (volume) | | Mineral Resources of the Altiplano and Cordillera Occidental, Bolivia By U.S. GEOLOGICAL SURVEY and SERVICIO...mineral resources of the Altiplano and Cordillera Occidental, Bolivia I by U.S. Geological Survey and Servicio...resources-Bolivia-Cordillera Occidental. 3. Geology-Altiplano. 4. Geology-Bolivia-Cordillera Occidental. I. Geological...work that led to this publication is a significant new chapter in a long and productive history of cooperation...industry in nontraditional areas of the Andean region of Bolivia. Bolivia has long been known for the |  | Montoya-Lopera, Paula, Ferrari, Luca, Levresse, Gilles, Abdullin, Fanis, Mata, Luis (2019) New insights into the geology and tectonics of the San Dimas mining district, Sierra Madre Occidental, Mexico. Ore Geology Reviews, 105. 273-294 doi:10.1016/j.oregeorev.2018.12.020 | Journal (article/letter/editorial) | | Accepted Manuscript New insights into the geology and tectonics of the San Dimas mining district, Sierra Madre...Madre Occidental, Mexico Paula Montoya-Lopera, Luca Ferrari, Gilles Levresse, Fanis Abdullin, Luis Mata...Abdullin, L. Mata, New insights into the geology and tectonics of the San Dimas mining district, Sierra Madre...Madre Occidental, Mexico, Ore Geology Reviews (2018), doi: https://doi.org/10.1016/j.oregeorev.2018.12.020...journal pertain. New insights into the geology and tectonics of the San Dimas mining district, Sierra Madre |  | Montoya-Lopera, Paula, Levresse, Gilles, Ferrari, Luca, Orozco-Esquivel, Teresa, Hernández-Quevedo, Gabriela, Abdullin, Fanis, Mata, Luis (2020) New geological, geochronological and geochemical characterization of the San Dimas mineral system: Evidence for a telescoped Eocene-Oligocene Ag/Au deposit in the Sierra Madre Occidental, Mexico. Ore Geology Reviews, 118. 103195 doi:10.1016/j.oregeorev.2019.103195 | Journal (article/letter/editorial) | | Journal Pre-proofs New geological, geochronological and geochemical characterization of the San Dimas...Eocene-Oligocene Ag/Au deposit in the Sierra Madre Occidental, Mexico Paula Montoya-Lopera, Gilles Levresse...Orozco-Esquivel, G. Hernández-Quevedo, F. Abdullin, L. Mata, New geological, geochronological and geochemical characterization...Eocene-Oligocene Ag/Au deposit in the Sierra Madre Occidental, Mexico, Ore Geology Reviews (2019), doi: https://doi...pertain. © 2019 Published by Elsevier B.V. 1 New geological, geochronological and geochemical characterization |  | | Report (issue) | | 0004244040 J. N. CRAMSIE, DIRECTOR GEOLOGICAL SURVEY OF NEW SOUTH WALES Cover photo: Photomicrograph of quartz-fibre...Cobar. Frontispiece: Historical photographs, Cobar region. Top: Eldorado claim, Mount Drysdale (Cobar Collection...4 level stope in eastern lode, Mount Boppy gold mine. Quartz-filled net-vein fractures and brecciated...negative 0108) Bottom Right: Mount Pleasant gold mine, Cobar (Cobar Collection negative 0083) Bibliographic...Geological Survey of New South Wales, Sydney. Edited by: J.R. Stewart ISSN 0727 9418 © New South Wales Department |  | MAGLAMBAYAN, Victor B., ISHIYAMA, Daizo, MIZUTA, Toshio, MATSUBAYA, Osamu, ISHIKAWA, Yohei (2001) Oxygen and Carbon Isotope Study of Calcite and Dolomite in the Disseminated Au-Ag Telluride Bulawan Deposit, Negros Island, Philippines. Resource Geology, 51 (2) 107-116 doi:10.1111/j.1751-3928.2001.tb00085.x | Journal (article/letter/editorial) | | intergrown with or filling voids between sphalerite, pyrite, chalcopyrite, galena and tennantite. Calcite,...abundance are sphalerite, galena, chalcopyrite, pyrite and tennantite. Maglambayan et al. (1998) reported...interstices are filled in by sphalerite, galena, pyrite, chalcopyrite, tennantite-tetrahedrite and rare...alteration assemblages in the Bulawan deposit, Negros Occidental, Philippines. The major hydrothermal minerals...rtz-albite-epidote-kaolinite> smectite±anatase±pyrite in andesite and the assemblage calcite-chlorit |  | | Journal (article/letter/editorial) | | Vol. 83, 1988, pp. 1721-1736 BatopilasMining District, Chihuahua,Mexico GREGG WILKERSON, U.S. Departmentof...Pyritizationisfoundin the intrusions. Minorquartz-pyrite veinsarefoundthroughout. Ganguein theBatopiias...asthe majorand almostexclusiveore mineralin the district. Since no large-scalemining or exploration effort...initiated. The productionof a The Sierra Madre Occidental which hosts the Ba- topilasdistricthasbeenthe...Location of the Batopilasmining district in the Sierra Madre Occidental, southwestern Chihuahua.B = locationof |  | | Report (issue) | | Magmatism and tectonics of the Sierra Madre Occidental and its relation with the evolution of the western...extensive geologic provinces is the Sierra Madre Occidental, which consists of volcanic complexes that resulted...magmatic pulses that characterize the Sierra Madre Occidental and that make it one of the largest silicic volcanic...authors also consider the mineral deposits of the region, indicating their spatial and temporal association...quite clearly that southern México is a complex region with a stratigraphic record that begins in the |  | | Journal (article/letter/editorial) | | obvious importance of Cu as a mobile ore metal in the region. Chloride concentrations are variable, with values...rocks), direct atmospheric leaching of the run of the mine (5ROM) ore with sulphuric acid will not be economically...crosscut the main quartz vein. During this phase, pyrite crystals in quartz veins could have partly been...chalcocite and pyrite in pores in wolframite. During a later stage, wolframite and pyrite were altered...ppm (up to a maximum of 1560 ppm). Mt. Pleasant mine, New Brunswick, Canada (style 2, Sinclair et al.2) |  | Angiboust, Samuel, Fayek, Mostafa, Power, Ian M., Camacho, Alfredo, Calas, Georges, Southam, Gordon (2012) Structural and biological control of the Cenozoic epithermal uranium concentrations from the Sierra Peña Blanca, Mexico. Mineralium Deposita, 47 (8) 859-874 doi:10.1007/s00126-012-0408-5 | Journal (article/letter/editorial) | | radionuclide migration in volcanic settings. We present a new genetic model that incorporates both geochemical...under reducing conditions several generations of pyrite and uraninite together with kaolinite. Oxygen isotopic...Mexico, about 50 km north of Chihuahua City. This district is reported as hosting 13,000 t Mo reserves (Goodell...the tectonic history of the Peña Blanca uranium district and on the basis of a set of drill core and outcrop...extension and the location of the Peña Blanca district (modified from Eaton 1982). The stars (see inset) |  | | Journal (article/letter/editorial) | | Springer-Verlag Berlin Heidelberg 2013 Abstract New thermal ionization mass spectrometry and multi-collector...similarity of ore Pb to igneous rock Pb in the Zimapan district (206Pb/204Pb=18.800–18.968) may indicate that...extent to which ore metals represent the addition of new material to the shallow crust from a mantle source...to the Laramide magmatism in the Sierra Madre Occidental; it produced the Laramide volcanic–plutonic succession...main magmatic provinces in Mexico (Sierra Madre Occidental, Sierra Madre del Sur, and the Trans-Mexican |  | André-Mayer, Anne-Sylvie, Leroy, Jacques, Bailly, Laurent, Chauvet, Alain, Marcoux, Eric, Grancea, Luminita, Llosa, Fernando, Rosas, Juan (2002) Boiling and vertical mineralization zoning: a case study from the Apacheta low-sulfidation epithermal gold-silver deposit, southern Peru. Mineralium Deposita, 37 (5) 452-464 doi:10.1007/s00126-001-0247-2 | Journal (article/letter/editorial) | | located in the Shila district, 600 km southeast of Lima in the Cordillera Occidental of Arequipa Province...main deposition stages are observed: (1) early pyrite and base-metal sulfides with minor electrum 1 and...about 600 km southeast of Lima in the Cordillera Occidental of southern Peru (Fig. 1). Several base- and...Suyckutambo, Orcopampa, and Shila, characterize this region (Fig. 1). The overall mineralogy of these deposits...position of the epithermal district of Shila. B Geologic map of the Shila district with location of the main |  | | Journal (article/letter/editorial) | | GeologicalSurveyof New SouthWales,Departmentof Mineral Resources, GPO Box5288, Sydney,New SouthWales2001...SouthWales2001, Australia Abstract The Cobar mining field, New SouthWales, consistsof three types of deposits:copper...adjacentfracturesconnectedto thosefaults. Introduction the C.S.A. mine. Theoriesof ore genesisof deposits in deformeds...chemically)remobilizedsyngenetic origin.However, Cobar in western New South Wales, Australia. Most asreportedhere,structuralanalysis...biditesare distalto submarinefansspreadingfrom the C.S.A. mine (Fig. 1) which containsseparatecop- the landmass |  | Vikre, Peter G., McKee, Edwin H., Silberman, Miles L. (1988) Chronology of Miocene hydrothermal and igneous events in the western Virginia Range, Washoe, Storey, and Lyon counties, Nevada. Economic Geology, 83 (4) 864-874 doi:10.2113/gsecongeo.83.4.864 | Journal (article/letter/editorial) | | laboratories. forms the Comstock,Silver City, Occidental, and The decayconstants usedfor 4øKand4øK/KabunFlowery...pervasivelyaltered quartz-aluniterocks zonitein the Utah mine (Comstocklode footwall)is have formed in extrusive...(SantiagoCanyontuff, Table 1, sample rocks.The 45 new agesof potassium-bearing min- 45) andmiddleMioceneandesite...southernpart of the disevents in the Virginia Range. The new ages also trict by the KnickerbockerAndesite,whichis...(10• YRS) QUARTZ-ALUNITE ASSEMBLAGE COMSTOCK/OCCIDENTAL SILVER CITY/FLOWERY ASSEMBLAGE mal• • • r |  | | Journal (article/letter/editorial) | | Ordovician volcano-intrusive rocks in the Puna region of northwestern Argentina suggest formation in...presence of a terrane-bounding suture in the study region. Geochronological constraints from 40Ar/39Ar (sericite-rich...(sericite-rich whole-rock) and Re–Os (arsenopyrite–pyrite) dating indicate initial deposition of gold in...include the (i) specific tectonic evolution of this region, (ii) absence of hydrated oceanic substrate in...703 (Russian Far East), the Buller Terrane (New Zealand), and the Eastern Andean Cordillera in Peru, |  | Camprubi, A., Gonzalez-Partida, E., Iriondo, A., Levresse, G. (2006) MINERALOGY, FLUID CHARACTERISTICS, AND DEPOSITIONAL ENVIRONMENT OF THE PALEOCENE EPITHERMAL Au-Ag DEPOSITS OF THE EL BARQUENO DISTRICT, JALISCO, MEXICO. Economic Geology, 101 (1) 235-247 doi:10.2113/gsecongeo.101.1.235 | Journal (article/letter/editorial) | | PALEOCENE EPITHERMAL Au-Ag DEPOSITS OF THE EL BARQUEÑO DISTRICT, JALISCO, MEXICO ANTONI CAMPRUBÍ,† EDUARDO GONZÁLEZ-PARTIDA...epithermal vein district is located in the southwestern part of the Sierra Madre Occidental of Mexico. It...Lower Volcanic Supergroup of the Sierra Madre Occidental, within the Jalisco block. The veins trend from...Upper Volcanic Supergroup of the Sierra Madre Occidental may be prospects for other epithermal veins and...portions of the Sierra Madre Occidental. Introduction The El Barqueño mining district is located in the Guachinango |  | | Journal (article/letter/editorial) | | vein district world class. In the world-class silver- and gold-producing Comstock mining district, Nevada...extension was reactivated in the stepover along the Occidental zone of normal faults east of the Comstock fault...stepover led to a new episode of hydrothermal activity and formation of the Occidental lodes. Introduction...Comstock lode, Virginia City, Nevada is such a district. For the period 1859 through 1996, the Comstock...network characteristics should be present within a district and in which high-grade orebodies may have formed |  | | Journal (article/letter/editorial) | | this enrichment and considerable prospectivity for new discoveries, there is a poor overall understanding...These, and probably the deposits of the East Sayan region (e.g. Zun Holba, Sora, Aksug), are part of the...formed, potentially at a similar time, but this region is dominated by deformation and plutonism associated...km along the eastern Asian Pacific margin. This region of lithosphere loss has a remarkable association...formation. The Kupol epithermal gold deposit Chukotka Region, NE Russia H. C. Golden 11/13 Proletarskaya Street |  | | Journal (article/letter/editorial) | | quartz,electrum,silverminerals(mainly acanthite),pyrite,basemetalsulfides, andminoramounts of calcite,sericite...depositin the Comstockdistrict,which alsoincludes the Occidental(Brunswick)lode, Silver City veins, andFloweryveins...Sutrofaciessuggests that localrelief wasconsiderable. the New Savagemine offered someconfirmationof K-Ar ages on...periodsof metalmineralization in the Comstock district. The earliest event consists of quartzq-bas...the northernVirginiaRange.If the K-Ar age of and mine dumpexamination. 12.3 _+0.5 Ma for a Chalk Hill |  | MAGLAMBAYAN, Victor B., ISHIYAMA, Daizo, MIZUTA, Toshio, IMAI, Akira, ISHIKAWA, Yohei (1998) Geology, Mineralogy, and Formation Environment of the Disseminated Gold-Silver Telluride Bulawan Deposit, Negros Occidental, Philippines. Resource Geology, 48 (2) 87-104 doi:10.1111/j.1751-3928.1998.tb00009.x | Journal (article/letter/editorial) | | Gold-Silver Telluride Bulawan Deposit, Negros Occidental, Philippines Victor B. MAGLAMBAYAN*, Daizo ISHIYAMA**...minerals are sphalerite, galena, chalcopyrite, pyrite and tetrahedite-tennantite with minor amounts of...on paragenesis, the Bulawan deposit formed in a pyrite-stable environment, with pH between 3.4 and 5.5...Bulawan gold-silver telluride deposit in Negros Occidental, Philippines, has characteristics which are similar...Keywords: Bulawan deposit, Negros porphyry copper district, Philippines, Au-Ag tellurides, Alteration, Aqueous |  | | Report (chapter) | | High Atlas (Morocco): the High Seksaoua mining district A. CHAUVET L. B A D R A 1, L . B A R B A N S...Casablanca 01, Morocco Abstract: The mineralized district of the High Seksaoua (Western High Atlas, Morocco)...for this mineralization and allows us to propose a new model of formation for this kind of deposit that...concentrations within the world (i.e. the Iberian Pyrite Belt, e.g. Leistel et al. 1998; Carvalho et al...setting General g e o l o g y The High Seksaoua district is located within the western High Atlas, part |
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