Now showing items 1-20 of 22

    • Rojas, Paula; Barra, Fernando; Reich Morales, Martín; Deditius, Artur; Simon, Adam; Uribe, Francisco; Romero, Rurik; Rojo, Mario (Springer Verlag, 2018)
      El Romeral is one of the largest iron oxide-apatite (IOA) deposits in the Coastal Cordillera of northern Chile. The Cerro Principal magnetite ore body at El Romeral comprises massive magnetite intergrown with actinolite, ...
    • Palma, Gisella; Barra Pantoja, Fernando; Reich Morales, Martin; Simon, Adam C.; Romero, Rurik (Elsevier, 2020)
      Magnetite is the most important iron ore in iron oxide-apatite (IOA) deposits which represent the Cu-poor endmember of the iron oxide-copper-gold (IOCG) clan. Magnetite chemistry has been used as a petrogenetic indicator ...
    • Reich Morales, Martín; Barnes, Jaime D.; Breecker, Daniel O.; Barra, Fernando; Milojevic, Catalina; Drew, Dana (Elsevier B.V., 2019)
      © 2019In the Atacama Desert of northern Chile, large amounts of the copper hydroxy-chloride mineral atacamite (Cu2Cl(OH)3) are formed in the supergene oxidation zone of Cu deposits. Since atacamite requires saline water ...
    • Perón Orrillo, Juan M.; Ortiz Suárez, Ariel; Rivarola, David; Otamendi, Juan E.; Morosini, Augusto; Romero, Rurik; Leisen, Mathieu; Barra, Fernando (Elsevier Ltd, 2019)
      The San Luis Formation is one of the lithostratigraphic units constituting the early Paleozoic crystalline basement of the Sierras de San Luis, which are part of the Sierras Pampeanas of central Argentina. The low-grade ...
    • Barra, Fernando; Deditius, Artur P.; Reich Morales, Martín; Kilburn, Matt R.; Guagliardo, Paul; Roberts, Malcolm P. (Nature, 2017)
      Rhenium and osmium isotopes have been used for decades to date the formation of molybdenite (MoS2), a common mineral in ore deposits and the world's main source of molybdenum and rhenium. Understanding the distribution of ...
    • Slagter, Silvina; Reich Morales, Martín; Muñoz Sáez, Carolina; Southon, John; Morata Céspedes, Diego; Barra, Fernando; Gong, Jian; Skok, J. R. (Geological Society of America, 2019)
      Silica sinter deposits overlying geothermal fields are reliable records of environmental, geochemical, and biological changes through time. Therefore, determining the absolute ages of formation of these deposits is fundamental ...
    • Ovalle, J. Tomás; La Cruz, Nikita L.; Reich Morales, Martín; Barra, Fernando; Simon, Adam C.; Konecke, Brian A.; Rodriguez-Mustafa, María A.; Deditius, Artur P.; Childress, Tristan M.; Morata Céspedes, Diego (Nature Publishing Group, 2018)
      © 2018, The Author(s). The genetic link between magmas and ore deposit formation is well documented by studies of fossil hydrothermal systems associated with magmatic intrusions at depth. However, the role of explosive ...
    • Román, Nelson; Reich Morales, Martín; Leisen, Mathieu; Morata Céspedes, Diego; Barra, Fernando; Deditius, Artur P. (Elsevier Ltd, 2019)
      © 2018 Elsevier Ltd The chemical composition, textures and mineral associations of pyrite provide key information that help elucidate the evolution of hydrothermal systems. However, linking the compositional and micro-textural ...
    • Sánchez Yáñez, Camilo; Reich Morales, Martín; Leisen, Mathieu; Morata Céspedes, Diego; Barra, Fernando (Elsevier, 2017)
      Sinter deposits are formed by precipitation of silica from hydrothermal fluids that have reached the surface environment. They are commonly found around hot springs and represent surface expressions of underlying geothermal ...
    • Camilletti, Giuliano; Otamendi, Juan; Tibaldi, Alina; Cristofolini, Eber; Leisen, Mathieu; Romero, Rurik; Barra, Fernando; Armas, Paula; Barzola, Matías (Elsevier, 2020)
      The Valle Fertil-La Huerta batholith is a differentially tilted, compositionally stacked, calc-alkaline plutonic sequence in the central Famatinian arc of Argentina. It consists of two major lithologic units: these are (1) ...
    • Palma, Gisella; Barra, Fernando; Reich Morales, Martín; Valencia, Victor; Simon, Adam C.; Vervoort, Jeff; Leisen, Mathieu; Romero, Rurik (Elsevier Ltd, 2019)
      © 2018 Elsevier LtdThe ratio of the halogens F and Cl in apatite is highly sensitive to changes in the composition of an evolving silicate melt or aqueous fluid. For this reason apatite chemistry is widely used as a monitor ...
    • Crespo, Jorge; Reich Morales, Martín; Barra, Fernando; Verdugo, Juan José; Martínez, Claudio; Leisen, Mathieu; Romero, Rurik; Morata Céspedes, Diego; Marquardt, Carlos (Soc Economic Geologists, 2020)
      Porphyry Cu-Mo deposits (PCDs) are the world’s major source of Cu, Mo, and Re and are also a significant source of Au and Ag. Here we focus on the world-class Río Blanco PCD in the Andes of central Chile, where Ag is a ...
    • Rivera, Javier; Reich Morales, Martín; Schoenberg, Ronny; González Jiménez, José; Barra, Fernando; Aiglsperger, Thomas; Proenza, Joaquín A.; Carretier, Sebastien (Elsevier B.V., 2018)
      Weathering of ultramafic rocks can lead to the formation of soil profiles with high contents of Fe, Ni, Co, platinum-group elements (PGE) and gold. Traditionally, these metal-rich soils are known as “laterites” and are ...
    • Tassara, Santiago; Reich Morales, Martín; Cannatelli, Claudia; Konecke, B. A.; Kausel Kausel, Domínica; Morata Céspedes, Diego; Barra, Fernando; Simon, A. C.; Fiege, A.; Morgado, E.; Leisen, Mathieu (Pergamon-Elsevier, 2020)
      The oxygen fugacity (fO(2)) of the Earth's upper mantle and its melting products is an important parameter in the geochemical evolution of arc magmas and their connection with the continental crustal construction and growth. ...
    • Romero, Rurik; Barra, Fernando; Leisen, Mathieu; Salazar, Eduardo; González Jiménez, José; Reich Morales, Martín (Taylor and Francis Inc., 2019)
      U-Pb detrital zircon age patterns are presented for nine samples of metapelites from the metamorphic basement of south-central Chile between 37° and 40°S, along with detrital zircon ages for a sample from the Piedra Santa ...
    • Reich Morales, Martín; Román, Nelson; Barra, Fernando; Morata Céspedes, Diego (MDPI, 2020)
      Active subaerial geothermal systems are regarded as modern analogues of low- to intermediate-sulfidation epithermal Au–Ag deposits, where minor amounts of Cu are mostly present as chalcopyrite. Although trace element ...
    • Tibaldi, Alina M.; Barzola, Matías G.; Cristofolini, Eber A.; Otamendi, Juan E.; Demichelis, Alejandro H.; Leisen, Mathieu; Romero, Rurik; Barra, Fernando; Camilletti, Giuliano; Armas, Paula (Elsevier Ltd, 2019)
      Mass transference from lower to upper crustal levels requires an efficient network of pathways that act as channels for draining melts from the source and transferring magmas through the crust. We report on a mid-crustal ...
    • La Cruz, Nikita L.; Simon, Adam C.; Wolf, Aaron S.; Reich Morales, Martín; Barra, Fernando; Gagnon, Joel E. (Springer Verlag, 2019)
      Apatite grains from the Los Colorados iron oxide–apatite (IOA) deposit, the largest IOA deposit in the Chilean Iron Belt (CIB), exhibit significant intracrystalline spatial variability with respect to the concentrations ...
    • Salazar, Eduardo; Barra, Fernando; Reich Morales, Martín; Simon, Adam; Leisen, Mathieu; Palma, Gisella; Romero, Rurik; Rojo, Mario (Springer Verlag, 2019)
      Kiruna-type iron oxide−apatite (IOA) deposits constitute an important source of iron and phosphorus, and potentially of rare earth elements (REE). However, the origin of IOA deposits is still a matter of debate with models ...
    • Salazar, Eduardo; Barra, Fernando; Reich Morales, Martín; Simon, Adam; Leisen, Mathieu; Palma, Gisella; Romero, Rurik; Rojo, Mario (Springer, 2020)
      Kiruna-type iron oxide-apatite (IOA) deposits constitute an important source of iron and phosphorus, and potentially of rare earth elements (REE). However, the origin of IOA deposits is still a matter of debate with models ...