 | | Report (issue) | | Scalemodelecaltydomessery Clay, GRISEMSMS wate Gn GOaNe MininG Districts vce oh with RApIAL ae TE ee PRE...Detwieccnmpasinsmancialip hits mamryt cetera MINING DISTRICTS, ASSOCIATED WITH CA NTICEINES eerie...0000eeceescececscdbeen structural map, or Rico; Colorado, .district: . ..+.5. ssw Fea ive Res five voles ow...cureieunertiae ote teers 12 Plan. and section of Sunlight district, Wyoming, 16 4, tires sheik aes ........02+2...Mexico Aenea SmmSCLUCLUTAlEMaprOrsOllyentons district ColoLadoum Ole Generalusectionsthroupheoilyentonidistricte |  | | Report (issue) | | ARIZONA LODE GOLD MINES AND GOLD MINING by Eldred D. Wilson, J. B. Cunningham, and G. M. Butler Bulletin...Arizona Tucson ARIZONA LODE GOLD MINES AND GOLD MINING by Eldred D. Wilson, J. B. Cunningham, and G. M...Mines Bulletin No. 137, ARIZONA LODE GOLD MINES AND MINING, was originally issued in 1934 in response to the...and, in view of the restrictions placed on gold mining during the war, it was not considered necessary...which deals with the laws and regulations governing mining, however, have been deleted, inasmuch as many of |  | Markowski, Agnès, Vallance, Jean, Chiaradia, Massimo, FontbotĂŠ, LluĂŹs (2006) Mineral zoning and gold occurrence in the Fortuna skarn mine, Nambija district, Ecuador. Mineralium Deposita, 41 (4) 301-321 doi:10.1007/s00126-006-0062-x | Journal (article/letter/editorial) | | zoning and gold occurrence in the Fortuna skarn mine, Nambija district, Ecuador Received: 24 February 2005...May 2006 # Springer-Verlag 2006 Abstract The Fortuna oxidized gold skarn deposit is located in the northern...northern part of the Nambija gold district, southern Ecuador. It has been subdivided into four mineralized...which are named from north to south: Cuerpo 3, Mine 1, Mine 2, and Southern Sector. Massive skarn bodies...intrusion which crops out below the skarn bodies in Mine 2 and the Southern Sector. Endoskarn alteration |  | | Journal (article/letter/editorial) | | cooke@utas.edu.au (D.R.C.) TMVC, Transforming the Mining Value Chain, an ARC Industrial Transformation Research...inclusions, which temporally co-exist with Ag-telluride inclusions and chalcopyrite. Three distinct Bi...bismuthinite hosts both Bi-tellurosulfide and Ag-telluride inclusions, whereas Ag-rich cosalite only hosts...be low in chloride-rich hydrothermal fluids, telluride and tellurosulfide inclusions are interpreted...increase with depth and not only occur as small telluride inclusions in Bi-minerals. A vertical zoning of |  | Chiaradia, Massimo, Vallance, Jean, FontbotĂŠ, Lluis, Stein, Holly, Schaltegger, Urs, Coder, Joshua, Richards, Jeremy, Villeneuve, Mike, Gendall, Ian (2009) UâPb, ReâOs, and 40Ar/39Ar geochronology of the Nambija Au-skarn and Pangui porphyry Cu deposits, Ecuador: implications for the Jurassic metallogenic belt of the Northern Andes. Mineralium Deposita, 44 (4) 371-387 doi:10.1007/s00126-008-0210-6 | Journal (article/letter/editorial) | | Pangui is a recently discovered porphyry CuâMo district. The geology of the Subandean zone in southeastern...veins postdating gold deposition) of the Nambija district are all indistinguishable from each other within...Department of Geosciences, Colorado State University, Fort Collins, CO 80523-1482, USA H. Stein Geological Survey...minerals. The new Jurassic age for the Nambija district is slightly younger than the 40Ar/39Ar and ReâOs...magmaticâhydrothermal minerals from the Pangui district, which range between 157 and 152 Ma. Mineralization |  | | Journal (article/letter/editorial) | | 240-m-thick quartzite unit of the Pennsylvanian Bingham Mine Formation, extends 170 m from the northeast margin...a thrust fault, below which beds of the Bingham Mine Formation are vertical and cut by abundant northeast-striking...dipping faults, dikes, and isoclinal folds, the Fortuna zone. Ore-forming hydrothermal assemblages in quartzite...nukundamite replaced by chalcopyrite and bornite, and no pyrite. Replacement of nukundamite by chalcopyrite and...of quartz + sericite Âą kaolinite with abundant pyrite, lesser amounts of bornite, digenite, enargite |  | Liu, Yuan, Li, Sheng-Rong, Santosh, M., Xu, Hong, Li, Chang-Ping, Liu, Shunhao (2019) Ore-forming physicochemical conditions of tellurium-gold deposits: A case study from the Guilaizhuang deposit, eastern North China. Geological Journal, 54 (4) 2400-2418 doi:10.1002/gj.3303 | Journal (article/letter/editorial) | | sulfide minerals in this deposit are pyrite, Asâbearing pyrite, arsenopyrite, chalcopy- 4 rite, galena...Tellurides contain native tellurium, Guilaizhuang Mining Company, Shandong Gold Conglomerate, Pingyi, Shandong...mineralization: quartzâpyrite stage, goldâpolymetallic sulfide stage, goldâtelluride stage, and carbonate...carbonate stage. The goldâtelluride stage represents the main stage of gold precipitation. In goldâpolymetallic...within pyrite and Asâbearing pyrite in the form of invisible gold, whereas in the goldâtelluride stage |  | Staude, S., Mordhorst, T., Neumann, R., Prebeck, W., Markl, G. (2010) Compositional variation of the tennantiteâtetrahedrite solid-solution series in the Schwarzwald ore district (SW Germany): The role of mineralization processes and fluid source. Mineralogical Magazine, 74 (2) 309-339 doi:10.1180/minmag.2010.074.2.309 | Journal (article/letter/editorial) | | tetrahedrite solidsolution series in the Schwarzwald ore district (SW Germany): The role of mineralization processes...(âfahloreâ) from 78 locations in the Schwarzwald ore district of SW Germany. Electron microprobe analysis is...fahlore, tennantite, tetrahedrite, Schwarzwald ore district, Black Forest, hydrothermal mineralization. Introduction...for Pb and Ag (Goldenberg and Steuer, 2004), and mining activities continued in medieval and modern times...2004). Geological setting The Schwarzwald ore district (SW Germany) is part of the European Variscan |  | | Journal (article/letter/editorial) | | 1â˘88, pp. 1583-1596 Ore Deposits at the Fresnillo Mine, Zacatecas,Mexico DELFINO C. RUVALCABA-RUIZ PasajeE...surface)level. Introduction hills, Loma de la Fortuna, Cerro Proafio, and Cerro Populo, with reliefs...veins,of which more than 30 ental (Fig. 1). The mine area,immediatelysouthand havebeenmajorore producers...Fresnilloand other baseand preciousmetal deposits. The mine maybe dividedinto three zones(Fig. 2): SantaElena...porphyritic quartz monzonitestock. Cerro Proafio district,inferring a major intrusionat depth. Stone (Fig |  | | Journal (article/letter/editorial) | | Survey, MS-973, Federal Center, Box 25046, Denver, Colorado 80225 DAVID A. JOHN, AND TED G. THEODORE U.S...crust below these mineral belts (Howard, 2003), district- to deposit-scale stream sediment and lithogeochemical...al., 2003), and stratigraphy and structure of a district located along a northeast-striking lineament (Peters...deformational, igneous, and hydrothermal events in mining districts, constrain the age of mineralization...investigations on neighboring deposits in a single district are more problematic and most likely are due to |  | | Journal (article/letter/editorial) | | Twin Creeks Carlin-Type Deposit, Nevada JOHN FORTUNA,* STEPHEN E. KESLER,â AND DAVID P. STENGER** Department...causing deposition of pyrite. Loss of reduced sulfur from solution to form pyrite destabilizes dissolved...Age of Twin Creeks Mineralization The Twin Creeks mine is located on the eastern flank of the Osgood Mountains...address: Lehman Brothers Equity Research, Metals and Mining Group, 745 7th Avenue, New York, New York 1001...by the Newmont Mining Company, and it is the third largest primary gold-producing mine in North America |  | Izaguirre, Aldo, Iriondo, Alexander, Kunk, Michael J., McAleer, Ryan J., Atkinson, William W., MartĂnez-Torres, Luis M. (2017) Tectonic Framework for Late Cretaceous to Eocene Quartz-Gold Vein Mineralization from the Caborca Orogenic Gold Belt in Northwestern Mexico*. Economic Geology, 112 (6) 1509-1529 doi:10.5382/econgeo.2017.4519 | Journal (article/letter/editorial) | | 20192, USA of Geological Sciences, University of Colorado at Boulder, Boulder 80309, Colorado, USA of Geology...Geology and Geology Museum, Colorado School of Mines, Golden 80401, Colorado, USA 6 Departamento de GeodinĂĄmica...copper-molybdenum porphyry belt (CMPB US-MEX). Colorado River Fairbanks/ Tintina Klondike Age 104â61...belt of the United States and Mexico and related mine sites and prospects are also shown. Downloaded...Age ~114â72 Ma Age ~160â152 Ma 30° Nacozari Fortuna San Francisco-Llano Northwestern/ Nevada Grass |  | | Journal (article/letter/editorial) | | tg4SEMENT Los Loros ALTERATIO_N SlLICIFICATION & Fortuna Grano- ADVANCED diorite,Chua. uicamata ARGILLIC...than the andesire advancedargillic alteration. Pyrite is ubiquitous consideredhere, so reducingthe height...K r.'.'.'.'.'.'.'.-.-. --I- SURFACE -'11'-+FORTUNA GRANODIORITE ⢠⢠........ '/J .,:':':.:.:.:.:-:...that the West Fissure, beyondwhich outcropsthe Fortuna mineralizing fluids ascendedthe West Fissure and...Fissuretestifyto importantmovementalongit subthe Fortuna granodioriteand 29.2-----0.5m.y. for sequentto |  | Valencia-Moreno, MartĂn, CamprubĂ, Antoni, Ochoa-LandĂn, Lucas, Calmus, Thierry, MendĂvil-Quijada, HĂŠctor (2017) Latest Cretaceous-early Paleogene âboomâ of porphyry Cu mineralization associated with the Laramide magmatic arc of Mexico. Ore Geology Reviews, 81. 1113-1124 doi:10.1016/j.oregeorev.2016.05.005 | Journal (article/letter/editorial) | | trending copper belt that extends from southwestern USA to southern Mexico. The copper mineralization is...Sonora, which are the El Pilar, Los Humos, and Fortuna del Cobre. The El Pilar deposit is located ~44...2014). The westernmost and older deposit is the Fortuna de Cobre, which is located ~180 km northwest of...and Valencia, 2014). ED The Buenavista del Cobre mine is the core of one of the larger porphyry copper...world (Bushnell, 1988), referred to as the Cananea district. It includes PT Milpillas, Lucy, Mariquita, |  | Barra, Fernando, Alcota, Hugo, Rivera, Sergio, Valencia, Victor, Munizaga, Francisco, Maksaev, Victor (2013) Timing and formation of porphyry CuâMo mineralization in the Chuquicamata district, northern Chile: new constraints from the Toki cluster. Mineralium Deposita, 48 (5) 629-651 doi:10.1007/s00126-012-0452-1 | Journal (article/letter/editorial) | | porphyry CuâMo mineralization in the Chuquicamata district, northern Chile: new constraints from the Toki...of the Collahuasi Group and intrusions of the FortunaâLos Picos Granodioritic Complex. Hypogene mineralization...grading outward to a chalcopyriteâpyrite zone and ultimately to a pyrite halo. Alteration is dominantly...alteration is relatively restricted to late quartzâpyrite veins (D-type veins). Previous KâAr geochronology...Washington State University, Pullman, WA, USA S. Rivera Coro Mining Corp, Santiago, Chile molybdenite mineralization |  | Vallance, Jean, FontbotĂŠ, LluĂs, Chiaradia, Massimo, Markowski, Agnès, Schmidt, Susanne, Vennemann, Torsten (2009) Magmatic-dominated fluid evolution in the Jurassic Nambija gold skarn deposits (southeastern Ecuador) Mineralium Deposita, 44 (4) 389-413 doi:10.1007/s00126-009-0238-2 | Journal (article/letter/editorial) | | Aslund 1998). The Nambija oxidized gold skarn district is one of the main gold producers of Ecuador (see...40 km west of the Peruvian border (Fig. 1). The district includes several mines detailed in Fig. 1 and...The results of previous studies on the Nambija district (Vallance et al. 2003; FontbotĂŠ et al. 2004; Markowski...mineralogical zonation has been observed at the mine scale, except at Fortuna. The main ore mineral associated with...endoskarn titanite from porphyritic intrusions at Fortuna and Campanillas as well as ReâOs ages of post-gold |  | | Report (issue) | | . . . . . . . . . . . . . . . . . 1 Chapter I. Mining Districts of Counties and the State of Utah. .... . . . . . . . . . . . . . . . . 1 Chapter II. Mining Districts of Utah . . . . . . . . . . . . . . ...increasing both because of renewed activity in old mining camps and because of Utahns and tourists who seek...selected metallic minerals of each county. CHAPTER I MINING DISTRICTS OF COUNTIES AND THE STATE OF UTAH The...publications may-be inter-changed. In Chapter I mining districts are listed alphabetically both for each |  | | Report (issue) | | Metallurgist MARK EHLE, Mining Engineer J. B. TENNEY, Geologist G. R. FANSETT, Mining Engineer R. E. S. HEINEMAN...___________________ _______ ___________ ___ __ ___ Colorado River________________________________ ______ ____...__________ . __ .____ _____ ______ __. General mining history_______________________ __________ ._______________...46 46 46 47 47 48 PART H.-MOUNTAIN RANGES AND MINING DISTRICTS .............. CHAPTER L-TRIGO MOUNTAINS................................................. Mining history and production........................ |  | | Report (issue) | | describes his recent visits to a small former fluorite mine 2.5 kilometers north of the village of Mihalkovo...border with Greece. Until its closure in 1994 this mine produced fluorite for industrial uses, and, it seems...and sphalerite after calcite, from the Broken Hill mine, Aggeneys, Northern Cape Province, South Africa...epimorphs after calcite, 14.2 cm, from the Broken Hill mine, Aggeneys, Northern Cape Province, South Africa...vividly colorful fluorite specimens from the Berbes mining area, Ribadesella, Asturias, Spainâmany to full |  | Skirrow, R.G, Camacho, A, Lyons, P, Pieters, P.E, Sims, J.P, Stuart-Smith, P.G, MirĂł, R (2000) Metallogeny of the southern Sierras Pampeanas, Argentina: geological, 40Arâ39Ar dating and stable isotope evidence for Devonian Au, AgâPbâZn and W ore formation. Ore Geology Reviews, 17 (1) 39-81 doi:10.1016/s0169-1368(00)00004-4 | Journal (article/letter/editorial) | | AgâPbâZn sulfideâquartz veining in the El Guaico district Ĺ˝386 " 4 Ma, sericite., and W-bearing quartz vein...the geology of principal deposits in all major mining districts of the project areas, and were supported...which to reassess the metallogeny of this historic mining region. 2. Geological setting and tectono-magmatic...Duraznito WâAu; Ĺ˝5. Las Aguilas NiâCu; Ĺ˝6. La Carolina district AuâAg; Ĺ˝7. San Francisco del Monte de Oro. 44...of La Rioja Ĺ˝Fig. 3., and in the Santo Domingo district in the Province of San Luis Ĺ˝Fig. 1.. 4.1. RÄąo |  | Ossandon C., G., Freraut C., R., Gustafson, L. B., Lindsay, D. D., Zentilli, M. (2001) Geology of the Chuquicamata Mine: A Progress Report. Economic Geology, 96 (2) 249-270 doi:10.2113/gsecongeo.96.2.249 | Journal (article/letter/editorial) | | 2001, pp. 249â270 Geology of the Chuquicamata Mine: A Progress Report GUILLERMO OSSANDĂN C., CODELCO-Chile...east through chalcopyrite-bornite to chalcopyrite-pyrite as sulfide abundance fades out. Sulfides in quartz-K...mineralization system. Main-stage veins with quartz, pyrite, chalcopyrite, and bornite were formed during dextral...the main stage was enargite, digenite, covellite, pyrite, and minor coarse sphalerite, along with sericite...all alteration zones and assemblages, including pyrite-free early-stage assemblages. Practically all of |  | | Report (issue) | | Gavilanes Tungsten District El Antimonio District Magdalena District Cananea District Preliminary Deposit-Type...or to a group of closely-spaced deposits. Two district records have been included (MX00018 and MX02161)...or names of individual orebodies. DISTRICT/AREA Informal district name used in the literature. Names...economic interest. MINOR: Coproducts or byproducts of mining. POTEN: Commodities that have not been exploited...geologic inferences only ("inferred ore"). The mining industry terms "proven", "probable", and "possible" |  | | Journal (article/letter/editorial) | | Environmental Sciences, New Mexico Institute of Mining and Technology, 801 Leroy, Socorro, New Mexico...fluid inclusions in fluorite from the Getchell mine is an artifact of boiling and a depth of â¤980 m...crystalline white-quartz vein in the DZ Fault, Twin Creeks mine contains cogenetic liquid-rich and vapor-rich fluid...Carlin-type gold mineralization at the Twin Creeks mine. Keywords: Carlin-type gold deposits; fluid boiling;...banded calcite containing realgar from the Getchell mine are described and compared to those in quartzâadulariaânative |  | | Journal (article/letter/editorial) | | LONG-LIVED HYDROTHERMAL SYSTEM IN THE FRESNILLO SILVER DISTRICT, MEXICO: CONSTRAINTS FROM 40Ar/39Ar GEOCHRONOLOGY...Environmental Sciences Department, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801 2New...and Mineral Resources, New Mexico Institute of Mining and Technology, 801 Leroy Place, Socorro, New Mexico...and dikes are the youngest igneous rocks in the district. Spatial association of Tertiary volcanic rocks...sulfate alteration, and epithermal veins makes the district ideal for evaluating the temporal relations between |  | | Report (issue) | | description of the geology, mining history, and production of the major gold-mining districts in 21 States...relations ---------------------------History of gold mining and trends in production_ J\labama -----------...--'ruba County -------------------------------Colorado ----------------------------------------J\dams...(to nearest 1,000 ounces) of 25 principal gold-mining districts of the United States-through 1959---...1880-1965 ------------------------Map showing gold-mining districts of Alaska ---------------------------------Graph |
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