| | 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...discoveries are the porphyries at La Escondida, Escondida Norte, Zaldívar, Rosario and Ujina in the Collahuasi | | | 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 | | Riveros, K., Veloso, E., Campos, E., Menzies, A., Véliz, W. (2014) Magnetic properties related to hydrothermal alteration processes at the Escondida porphyry copper deposit, northern Chile. Mineralium Deposita, 49 (6) 693-707 doi:10.1007/s00126-014-0514-7 | Journal (article/letter/editorial) | alteration processes at the Escondida porphyry copper deposit, northern Chile K. Riveros & E. Veloso & E...using magnetic methods. In the Escondida porphyry Cu deposit of northern Chile, each hydrothermally altered...Universidad de Atacama, Copayapu 485, Copiapó, Chile e-mail: karl.riveros@uda.cl K. Riveros : E. Veloso...0610, Antofagasta, Chile W. Véliz Minera Escondida Ltd, Avenida de la Minería 501, Antofagasta, Chile...and magnetic properties of the wall rock in the Escondida deposit. These magnetic methods can be considered | | | Journal (article/letter/editorial) | Canyon, Utah; Collahuasi, Chuquicamata, La Escondida, El Teniente, Chile) makes them valuable exploration targets... RICHARDS 10000 Chimborazo Escondida (RP) Escondida (EP) 1000 Zaldívar (LP) Primitive Mantle Normalized...Ti Sn Eu Zr Hf Nd Sm Sr P Pr M Ce Pb K La U Nb Th Ba Tl Rb Cs 0.1 Element FIG. 2....porphyry Cu intrusions from Escondida, Zaldívar, and Chimborazo, northern Chile, and coeval regional diorite...normalization values from Sun and McDonough (1989). EP = Escondida porphyry, LP = Llamo porphyry, RP = Rhyolitic | | | Report (chapter) | are defined by the following reactions to form muscovite (Eqn. 1), kaolinite (Eqn. 2) (or pyrophyllite)...alunite + kaolinite and alunite + kaolinite + muscovite (or illite) are common as part of the advanced...invariant point for the assemblage alunite + muscovite + kaolinite (or pyrophyllite) + quartz in terms...alunite + K-feldspar and alunite + K-feldspar + muscovite have not been reported. As noted by Hemley et...contents. Alunite from La Escondida, a porphyry copper deposit in northern Chile, is somewhat richer in | | Perello, J., Carlotto, V., Zarate, A., Ramos, P., Posso, H., Neyra, C., Caballero, A., Fuster, N., Muhr, R. (2003) Porphyry-Style Alteration and Mineralization of the Middle Eocene to Early Oligocene Andahuaylas-Yauri Belt, Cuzco Region, Peru. Economic Geology, 98 (8) 1575-1605 doi:10.2113/gsecongeo.98.8.1575 | Journal (article/letter/editorial) | Peru JOSÉ PERELLÓ,† Antofagasta Minerals S.A. Ahumada 11, Oficina 602, Santiago, Chile VÍCTOR CARLOTTO...Universidad Nacional San Antonio Abad del Cuzco. Avenida de la Cultura, Cuzco, Perú ALBERTO ZÁRATE, PEDRO RAMOS...CABALLERO, Minera Anaconda Perú S.A. Avenida Paseo de la República 3245, Piso 3, San Isidro, Lima 27, Perú...AND RICARDO MUHR Antofagasta Minerals S.A. Ahumada 11, Oficina 602, Santiago, Chile Abstract Originally...rapidly emerging as an important porphyry copper province. Field work by the authors confirms that mineralization | | | Journal (article/letter/editorial) | ppm, Yb ≤1.9 ppm, Ni ≥20 ppm, Cr ≥30 ppm, Sr/Y ≥20, La/Yb ≥20, and 87Sr/86Sr ≤0.7045. Rocks with such compositions...as low Y and Yb concentrations and high Sr/Y and La/Yb ratios, can be generated in normal asthenosphere-derived...Kay (1978), these rocks were characterized by high La/Yb ratios (i.e., high ratios of light rare earth...Rapp and Watson (1995); the HREE depletions (high La/Yb ratios) indicated residual garnet in the source...(1986), Drummond and Defant (1990) also used a plot of La/Yb versus Yb (Fig. 1b) to emphasize the strong HREE | | | Journal (article/letter/editorial) | Examples are Chuquicamata, El Teniente or La Escondida, all in Chile, or Henderson, Butte and Bingham, in...Metal T FI (°C) Bajo de la Alumbrera, Argentina Zaldivar Chile La Escondida Chile Bingham Utah Hudson Bay...Ga 2 Pd Co Cu Mo PtRh Lu Os Nb CrCo Zn Cd V Y La Mn Zr Ti Sn Sc Au Sr Ir Co Rb Ag K Cu SH Cl F Tl...magma composition (Robb, 2004). Some metals (Zr, La, Hf, Mn) obviously present low partitioning within...water content associated with lower temperature (muscovite breakdown starts at 700 °C, and biotite at 800 | | | Journal (article/letter/editorial) | as Cu in Sbearing MVP, as in Zaldivar, northern Chile (Campos et al., 2002; Harris et al., 2008; Rabbia...Au-bearing fluid inclusions are also observed from Bajo de la Alumbrera, Argentina (Ulrich and Heinrich, 2001)...Bajo de la Alumbrera, Argentina (Ulrich and Heinrich, 2001), from 750 to 900 °C in Zaldivar, Chile (Campos...(Campos et al., 2002), from 650 to 680 °C in La Escondida, Chile (Padilla-Garza et al., 2004) and from 640...liberated by aqueous minerals breakdown, such as muscovite, biotite and amphibole (Clemens, 1990). Heat brought | | | Book | continue in the Patagonian Andes of Argentina and Chile over the last years. As a result of this extensive...de Geología, Universidad Andres Bello, Santiago, Chile Graeme Eagles Helmholtz Centre for Marine and Polar...de Geología, Universidad Andres Bello, Santiago, Chile Gonzalo Galaz Departamento de Geología Regional...Bello, Santiago, Chile; Departamento de Geología, Universidad de Chile, Santiago, Chile Marco Maffione Department...Servicio Nacional de Geología y Minería, Santiago, Chile Christian Sue Bourgogne Franche-Comté University | | Negro, F., de Sigoyer, J., Goffé, B., Saddiqi, O., Villa, I.M. (2008) Tectonic evolution of the Betic–Rif arc: New constraints from 40Ar/39Ar dating on white micas in the Temsamane units (External Rif, northern Morocco) Lithos, 106 (1) 93-109 doi:10.1016/j.lithos.2008.06.011 | Journal (article/letter/editorial) | documented in the core of the internal Betics (Galindo-Zaldívar et al., 1989; García-Dueñas et al., 1992; Jabaloy...image of mica from sample TF02-08. (b) Celadonite–Muscovite–Pyrophyllite ternary diagrams of phengite compositions...comparatively coarse samples). 4.2. 101 kaolinite, muscovite, phengite relics, and paragonite, a simple binary...paragonite). The inferred age for the low-Cl, low-Ca “muscovite” is ca. 13–14 Ma. The most Ca-rich and Clrich...The low-Ca, low-Cl one is presumably the true muscovite. Because the correlation line is defined by a segment | | | Journal (article/letter/editorial) | using a HAADF FEI TITAN G2 instrument, working at muscovite andwas olivine. 300 kV. Analytical electron microscopy...MnS, albite, spessartine, biotite, titanite, muscovite and olivine. XRD data indicate that dolomite is...sample and the <2 µm fraction is mainly made of muscovite, the specific minerals forming the 14.40 Å peak...(in blue).of Dol: dolomite, Kln: kaolinite, Ms: muscovite, Pg: paragonite, Qz: quartz, Cal: calcite, Fsp:...ethylene-glycol (in b 6 of 14 Kln: kaolinite, Ms: muscovite, Pg: paragonite, Qz: quartz, Cal: calcite, Fsp: | | Acosta-Vigil, Antonio, Rubatto, Daniela, Bartoli, Omar, Cesare, Bernardo, Meli, Sandro, Pedrera, Antonio, Azor, Antonio, Tajčmanová, Lucie (2014) Age of anatexis in the crustal footwall of the Ronda peridotites, S Spain. Lithos, 210. 147-167 doi:10.1016/j.lithos.2014.08.018 | Journal (article/letter/editorial) | Tajčmanová f a Instituto Andaluz de Ciencias de la Tierra, Consejo Superior de Investigaciones Científicas—Universidad...generating the Alborán Sea (Comas et al., 1999; Galindo-Zaldívar et al., 1998). This thinning was probably associated...(≤600–650 °C): K–Ar and Rb–Sr analyses on whole rock, muscovite, biotite and hornblende, and zircon and monazite...pairs 30–81 22–23 16–19 19–20 19–23 19–20 Punta de la Mona ? Torrox Torrox Torrox Sierra Cabrera 40 Ar–39Ar...16–18 Carratraca Carratraca Carratraca Punta de la Mona U–Pb on Zrn, Ion Microprobe U–Pb on Zrn, Ion | | | Journal (article/letter/editorial) | Gil-Crespo c a b c Instituto Andaluz de Ciencias de la Tierra y Departamento de Geodinámica (CSIC-Universidad...Present address: Instituto Andaluz de Ciencias de la Tierra y Departamento de Geodinámica, Universidad...quartz and tourmaline with minor quantities of muscovite, epidote and Al-rich titanite. Apatite and zircon...of the porphyroclast. Graphite schist includes muscovite, quartz, garnet, staurolite, kyanite, chloritoid...and graphite-free rims including tourmaline, muscovite and quartz in places. Staurolite occurs as porphyroclasts | | Sánchez-Roa, Catalina, Bauluz, Blanca, Nieto, Fernando, Abad, Isabel, Jimenéz-Millán, Juan, Faulkner, Daniel (2018) Micro- and nano-scale study of deformation induced mineral transformations in Mg-phyllosilicate-rich fault gouges from the Galera Fault Zone (Betic Cordillera, SE Spain) American Mineralogist, 103 (10) 1604-1621 doi:10.2138/am-2018-6316 | Journal (article/letter/editorial) | and Kronenberg 1993; Sánchez-Navas and Galindo-Zaldívar 1993; French et al. 2015). Delamination often...(1975): albite, olivine, biotite, spessartine, muscovite, chlorite, and titanite. Structural formulas of...Alfaro, P., Sanz de Galdeano, C., and Galindo-Zaldívar, J. (2011) Glacis geometry as a geomorphic marker...Kronenberg, A.K. (1993) Experimental deformation of muscovite. Journal of Structural Geology, 15, 1061–1075...Sánchez-Navas, A. (1999) Sequential kinetics of a muscovite-out reaction: A natural example. American Mineralogist | | Abad, Isabel, Jiménez-Millán, Juan, Schleicher, Anja M., van der Pluijm, Ben A. (2017) Mineral characterization, clay quantification and Ar–Ar dating of faulted schists in the Carboneras and Palomares Faults (Betic Cordillera, SE Spain) European Journal of Mineralogy, 29 (1) 17-34 doi:10.1127/ejm/2017/0029-2580 | Journal (article/letter/editorial) | estudiado dos zonas de falla ricas en minerales de la arcilla (Cordillera Bética, SE España), exhumadas...las zonas de falla juegan en la génesis de rocas ricas en minerales de la arcilla. Ambas áreas se caracterizan...constituyen una compleja disposición de lentes cizalladas. La caracterización de las muestras (protolíticas y rocas...minerales principales de las mismas son el cuarzo, la clorita y las micas potásicas. En algunas muestras...identificado paragonita y óxidos de Fe y Ti y además, la mayoría de las rocas de falla tienen caolinita, ilita | | | Journal (article/letter/editorial) | undesirable gangue minerals (biotite, clinochlore and muscovite) also present in the ore. Consequently, more acid...anionic surfactants used for the control of acid mine drainage. 1.60 2.2.2. Sulfur oxidation Sulfur...thank Barrick Gold Corporation and Compañía Minera Zaldívar for permission to publish this material, former | | | Journal (article/letter/editorial) | isotopic dating. Brannerite from the Kansanshi mine, Western Province, Zambia, is found in association with a...U–Th–Pb D (1016 α mg−1) dpa Crocker's Well, SA W. Province, Zambia Sierra Albarrana, Spain Bou-Azzer, Morocco...for this sample based upon the known ages of muscovite-biotite type (Na rich) and hornblende-biotite...Alpine hydrothermal quartzbarite vein at the La Gardette mine, near Bourg d' Oisans, Isere, where it occurs...gray to white). B) Sample B4, Kansanshi mine, Western Province, Zambia, t = 500– 520 Ma, showing relatively | | | Book (volume) | Contributors Pedro Alfaro Departamento Ciencias de la Tierra y Medio Ambiente, Universidad de Alicante...José Miguel Azañón Instituto Andaluz de Ciencias de la Tierra (CSIC-UGR), Instituto Andaluz de Geofísica...Spain Iván Martín-Rojas Departamento Ciencias de la Tierra y Medio Ambiente, Universidad de Alicante...Institut de Ciències del Mar—CSIC, Pg. Marítim de la Barceloneta 37-49, 08003 Barcelona, Spain; GRD, Scripps...Oceanography, University of California San Diego, La Jolla 92093, USA Paulo Pereira Institute of Earth | | | Book | in deposit scale, but also in semi-regional (near mine) and regional (mineral belts) scales. The models...uncertainty values represent: (1) Observed in field, mine or drill-core; (2) Interpreted from geophysical...reflection seismic profiles between the Neves Corvo mine and the Spanish border allowed to extend a 3D-model...predictive model, constructed for the Neves Corvo mine, delineates, not only the known Neves Corvo orebodies...associated iron oxide replacement and skarn in the Cala mine and the Ni-(Cu-PGE) deposit in the Aguablanca mafic | | | Journal (article/letter/editorial) | Nieto, & González-Lodeiro, 2007; Jabaloy, Galindo-Zaldívar, & González-Lodeiro, 1993; Lonergan & Platt, 1995)...2016). A wide range of elements (Si, P, S, Ca, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Pb, Th and U) was analyzed...coordinates: 37°3′22″ N, 3°21′39″ W) and at Laguna de la Caldera in the Ragua unit (sample 23098, coordinates:...to 3.33 Si pfu with phengite in the core and muscovite at the rim (Figure 6b). Paragonite in the phyllosilicate...(2016), and Imayama et al., (2012), U-Th-Pb in-situ LA-ICP-MS and SHRIMP dating on monazite point to activation | | | Journal (article/letter/editorial) | quartz, albite, chlorite, hematite, apatite, muscovite, epidote, sphene and carbonates, which infilled... minor secondary muscovite (Ms I) and illite (Il); E – secondary flakes of muscovite (Ms II), aggregates...mines) or in the Silurian metasediments (Borralha mine) (Cheilletz and Giuliani, 1982; Noronha 1983, 1984a...with a CuK␣ radiation, at the Centre de Géochimie de la Surface, Université Louis Pasteur (ULP – Strasbourg...analyses were carried out at the Centre de Géochimie de la Surface, Université Louis Pasteur (ULP − Strasbourg | | | Journal (article/letter/editorial) | Málaga, Spain 2 Instituto Andaluz de Ciencias de la Tierra, CSIC-Universidad de Granada, Facultad de...Keywords: Ammonium-rich white mica, Betic Cordillera, muscovite, SEM, TEM-AEM, tobelite Introduction Ammonium...(1975). Albite (Na), muscovite and annite (K), albite, spessartine, and muscovite (Al), forsterite and...an 1108 (Carlo Erba) CHN analyzer (University of La Coruña). Analysis conditions were: Oxidation temperature...of graphite-rich ammoniumbearing white mica, muscovite, and quartz, define an early schistosity (S1) | | Rottier, Bertrand, Kouzmanov, Kalin, Bouvier, Anne-Sophie, Baumgartner, Lukas P., Wälle, Markus, Rezeau, Hervé, Bendezú, Ronner, Fontboté, Lluís (2016) Heterogeneous melt and hypersaline liquid inclusions in shallow porphyry type mineralization as markers of the magmatic-hydrothermal transition (Cerro de Pasco district, Peru) Chemical Geology, 447. 93-116 doi:10.1016/j.chemgeo.2016.10.032 | Journal (article/letter/editorial) | HSMIs and hypersaline liquid inclusions determined by LA-ICP-MS are interpreted to represent the fluid composition...inclusions, fluid inclusions, porphyry-epithermal, LA-ICP-MS, SIMS, quartz, SEMCL. 2 ACCEPTED MANUSCRIPT...quartz veins only from a few localities: Bajo de la Alumbrera porphyry Cu-Au deposit in Argentina (Harris... ii) microthermometry and LA-ICP-MS analyses of fluid inclusions, iii) LA-ICP-MS analyses of HSMIs, ...pyrite alteration grading to illite-smectite-muscovite-pyrite and more externally to chlorite-calcite-pyrite | | | Journal (article/letter/editorial) | Baza Basin were carried out in outcrop and in some mine galleries. A number of stratigraphic sections were...unit) are thick enough to allow exploitation in mine galleries. Throughout this paper the terms lamina...of micritic carbonate (dolomite, in general), muscovite flakes and clay. The gypsum laminae range in thickness...crystals and inside them as impurities (mainly muscovite flakes). Crystal overgrowths are very common....nodules (white) developed along a dark lutite bed. Mine gallery in the Cerro del Minado area. (5) Gypsum |
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