| | Journal (article/letter/editorial) | AND SUPERGENE WEATHERING IN THE EL PEÑÓN DISTRICT, NORTHERN CHILE IAN WARREN,† Yamana Gold, 9670 Gateway...Zealand Abstract The El Peñón epithermal gold-silver deposit, Region II, Chile, comprises multiple epithermal...in the Paleocene metallogenic belt of northern Chile. Quartz-adularia-carbonate veins are hosted in Paleocene...related to precious metals mineralization of the El Peñón deposit. Timing of hydrothermal activity in the...by ages for vein adularia, hypogene alunite, and supergene alunite determined by Ar39/Ar40 step-heating | | | Journal (article/letter/editorial) | alteration minerals for the El Peñón epithermal deposit, northern Chile. The same techniques are applied...versus Ca and Na. El Peñón Epithermal Au-Ag Deposit Geologic setting The El Peñón Au-Ag deposit is located...Central Depression of northern Chile, 125 km southeast of Antofagasta (Fig. 3). The deposit comprises...70° 68° Faride 60-63Ma Antofagasta 24° Spence 64Ma Sierra Gorda 64Ma El Peñón Lomas Bayas 60Ma Santiago...belt Antofagasta 36° San Cristóbal 54Ma El Peñón 52-53Ma property/ district 24° La Escondida deposit | | | Book | label: Aerial view of the Bingham Canyon copper mine, Kennecott Utah Copper, September 2003. Photo courtesy...and CopperGold Deposits at Los Pelambres, Central Chile José Perelló, Richard H. Sillitoe, Constantino...of the Río Blanco-Los Bronces District, Central Chile: Development of World’s Greatest Known Concentration...Northern Chile Geologic Overview of the Escondida Porphyry Copper District, Northern Chile Geology of...N. Moreto, André Luiz Silva Pestilho, Mineral Province, Brazil Gustavo Henrique Coelho de Melo, Marco | | | Journal (article/letter/editorial) | Silicification, vuggy residual quartz, quartz-alunite Quartz, alunite, barite Silicification, quartz-adulariaillite...H2S-bearing steam condensate Opal/chalcedony, alunite, kaolinite, smectite H2S-bearing steam condensate...argillic assemblage comprises powdery opaline silica, alunite, and/or kaolinite (Fig. 4b), depending on solution...lithocap of the Marte porphyry gold deposit, northern Chile (see Sillitoe 1994). b Steam-heated alteration exposed...Norte HS gold-silver orebody at La Coipa, northern Chile. Note its white, friable character. c Steam-heated | | | Journal (article/letter/editorial) | and the local structure in natural and synthetic alunite (K,Na,H3O)Al3(SO4)2(OH)6 by multi-nuclear solid-state...Seasonal variations of ochreous precipitates in mine effluents in Finland—Sirpa Kumpulainen, Liisa Carlson...arsenic mobility in a creek draining an antimony mine abandoned 85 years ago (upper Orb basin, France)—C...mixing of acid-mine drainage and ambient river water downstream of the Elizabeth copper mine, Vermont, USA...orogenic gold in the Archaean Eastern Goldfields Province, Yilgarn craton, Western Australia—A.A. Morey | | | Journal (article/letter/editorial) | and vanadocrete (vanadate). Panczner 1987 Tajo Mine, Hidalgo del Parral, Chihuahua, Mexico Panczner...svanbergite svanbergitewoodhouseite s.s.s alunite P-bearing alunite goyazite florencite florencitegoyazite...svanbergite alunogen aluminite alunite brochantite chalcantite gypsum alunite sulfate (plus APS minerals)...Baumgarten et al. 2008 Dill et al. 1997a Cajamarca Province Peru Palache et al. 1951 Malpelo Island, Colombia...Agua Shuca Cerro Blanco El Salvador Schneider 1958; Cazañas et al. 2003 El Cobre Cuba Camprubí et | | | Book (edition) | especies. Cabe señalar la actuación de Roberto Beder por el aporte del estudio de los minerales en las calizas...Brodtkorb, M.K. de, Gordillo, C. y Gay, H.D., 1983, el número de minerales ascendía a 466 debido principalmente...incorporación del estudio de minerales radiactivos. El anexo de la tercera versión, publicado por Milka...Pezzutti, S. Tourn, y M.E. Vattuone constó de 3 tomos. El primero incluyó las clases I (elementos) y II (sulfuros...sulfosales, seleniuros y telururos), publicado en 2002. El Tomo 2, involucró las clase III (halogenuros), clase | | | Journal (article/letter/editorial) | occurs in a 200-kmlong by 40-km-wide metallogenic province that contains approximately 50 epithermal Au-Ag...FIG. 2. Surface geologic map of the Golden Cross mine area, showing the locations of the Empire vein system...Stratigraphy and Lithologic Units of the Golden Cross Mine Area (Caddey et al., 1995; Brathwaite and Christie...youngest to oldest maximum thickness of unit within the mine area Drill core samples were taken on an average...veinlets, together with rare, local steam-heated alunite, also formed during late-stage hydrothermal activity | | | Book | is the minimum grade at which it is worthwhile to mine a certain deposit. Everything below it (low-grade...chalcopyrite (brass) from the Friedrich-Christian Mine in Wildschapbach, Black Forest (Germany) (photo...black Fig. 1.2 Chalcopyrite on quartz. Silberwiese Mine, Oberlahr, Westerwald (Germany) (photo © Monika...CuS (Fig. 1.4). Fig. 1.5 Chalcocite from Mammoth Mine, Mount Isa-Cloncurry Territory (Queensland, Australia)...Introduction Fig. 1.6 Tetrahedrite from Wenzel Mine in Oberwolfach, Black Forest (Germany) (photo © | | Simpson, Mark P., Gazley, Michael F., Stuart, Alistair G.J., Pearce, Mark A., Birchall, Renee, Chappell, Debra, Christie, Anthony B., Stevens, Murray R. (2019) Hydrothermal Alteration at the Karangahake Epithermal Au-Ag Deposit, Hauraki Goldfield, New Zealand. Economic Geology, 114 (2) 243-273 doi:10.5382/econgeo.2019.4630 | Journal (article/letter/editorial) | Australia 6630, Australia 3 Fraser Thomas Ltd, 21 El Kobar Drive, East Tamaki, Auckland 2013, New Zealand...January 8, 2019 244 B 38°S 6417500N Ascot Hg Mine iver ri R mu ine Oh 200 km Wellington Tokatea...locations of the Rahu prospect and Ascot Cinnabar mine (modified from Brathwaite and Christie, 1996; Stevens...(Christie et al., 2007), a 200-km-long metallogenic province that contains approximately 50 epithermal Downloaded...waters can result in the formation of kaolinite, alunite, and opal, which are vertically zoned around the | | | Report (issue) | CAMBODIA CAMEROON CANADA CENTRAL AFRICAN REPUBLIC CHAD CHILE CHINA COLOMBIA COMOROS CONGO COSTA RICA CÔTE D’IVOIRE...DJIBOUTI DOMINICA DOMINICAN REPUBLIC ECUADOR EGYPT EL SALVADOR ERITREA ESTONIA ESWATINI ETHIOPIA FIJI FINLAND...URANIUM DEPOSITS, THE CENTRAL UKRAINIAN URANIUM PROVINCE ................................................4.1 Objective Evaluation of P2O5 and uranium in El-Sebaiya and Abu-Tartur areas to determine the added...Key results The inferred phosphate resources in El-Sebaiya area are about 80 million tons with an average | | | Book | . . . . . 6.4.5 The Namaqua-Natal Metamorphic Province . . . . . . . . . . . . . . . . 6.5 Neoproterozoic:... . . . . . . . . . . . . 18.4.3 The Tocantins Province: Archean Greenstone Belts, Paleoproterozoic Terranes...Craton . . . . . . . . . . . 18.4.4 The Borborema Province . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . 23.8.1 Rosh Pinah Mine . . . . . . . . . . . . . . . . . . . . . . . ....Alegre F Congo–Sao Francisco (plus Borborema province) Piquete Formation PF 24 22 10 500 K–Ar |
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