Now showing items 21-40 of 42

    • Deditius, Artur P.; Reich Morales, Martín; Simon, Adam C.; Suvorova, Alexandra; Knipping, Jaayke; Roberts, Malcolm P.; Rubanov, Sergey; Dodd, Aaron; Saunders, Martin (Springer, 2018-06)
      Magnetite from hydrothermal ore deposits can contain up to tens of thousands of parts per million (ppm) of elements such as Ti, Si, V, Al, Ca, Mg, Na, which tend to either structurally incorporate into growth and sector ...
    • González Jiménez, José; Deditius, Artur; Gervilla, Fernando; Reich Morales, Martín; Suvorova, Alexandra; Roberts, Malcolm; Roqué, Josep; Proenza, Joaquín A. (Walter de Gruyter GmbH, 2018)
      We report new results of a combined focused ion beam and high-resolution transmission electron microscopy (FIB/HRTEM) investigation of platinum-group elements (PGE)-rich base-metal sulfides. The Ni-Fe-Cu base-metal ...
    • Rojas, Paula A.; Barra Pantoja, Luis Fernando; Deditius, Artur; Reich Morales, Martín; Simon, Adam; Roberts, Malcolm; Rojo, Mario (Elsevier, 2018)
      Iron oxide-apatite (IOA) or Kiruna-type deposits are an important source of iron and other elements including REE, U, Ag, and Co. The genesis of these deposits remains controversial, with models that range from a purely ...
    • Reich Morales, Martín; Bao, Huiming (Mineralogical Society of America, 2018)
      The nitrate deposits of the Atacama Desert are unique when one considers that in most surface environments nitrate is produced or consumed by biological processes and is easily washed away by rain. Nitrate deposits have ...
    • 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 ...
    • Sánchez Alfaro, Pablo; Arancibia, Gloria; Reich Morales, Martín; Pérez Flores, Pamela; Cembrano, José; Driesner, Thomas; Lizama, Martín; Rowland, Julie; Morata Céspedes, Diego; Heinrich, Christoph A.; Tardani, Daniele; Campos, Eduardo (Elsevier, 2016)
      In this study, we unravel the physical, chemical and mineralogical evolution of the active Tolhuaca geothermal system in the Andes of southern Chile. We used temperature measurements in the deep wells and geochemical ...
    • 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; González Jiménez, José; Reich Morales, Martín; Schilling, Manuel E.; Morata Céspedes, Diego; Begg, Graham; Saunders, Edward; Griffin, William L.; O'Reilly, Suzanne Y.; Gregoire, Michel; Barra Pantoja, Luis Fernando; Corgne, Alexandre (Nature Publishing Group, 2017)
      Gold enrichment at the crustal or mantle source has been proposed as a key ingredient in the production of giant gold deposits and districts. However, the lithospheric-scale processes controlling gold endowment in a given ...
    • 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. ...
    • Vázquez Vilches, María Mercedes; Ramírez Guevara, Sebastián; Morata Céspedes, Diego; Reich Morales, Martín; Braun, Jean-Jacques); Carretier, Sebastien (Elsevier, 2016)
      We have evaluated the long-term chemical and physical weathering mass balance of an anomalously thick saprolite profile (>30 in thickness) developed in granitic rocks near Curacavi, Coastal Range of central Chile. The ...
    • Romero, Rurik; Barra, Fernando; Leisen, Mathieu; Salazar, Eduardo; González Jiménez, José; Reich Morales, Martín (Taylor and Francis Inc., 2020)
      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 ...
    • Muñoz Sáez, Carolina; Pérez Núñez, Carolina; Martini, Sebastián; Vargas Barrera, Alonso; Reich Morales, Martín; Morata Céspedes, Diego; Manga, Michael (Elsevier, 2020)
      Natural geysers on Earth are uncommon and most of them are clustered in large basins that share common characteristics, specifically, a magmatic heat source, meteoric water supply, and a set of fractures and/or porous rocks ...
    • Wörner, Gerhard; Schildgen, Taylor; Reich Morales, Martín (Mineralogical Society of America, 2018)
      The Central Andes and the Atacama Desert represent a unique geological, climatic, and magmatic setting on our planet. It is the only place on Earth where subduction of an oceanic plate below an active continental margin ...
    • 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 ...
    • La Cruz, Nikita L.; Ovalle, J. Tomás; Simon, Adam C.; Konecke, Brian A.; Barra Pantoja, Fernando; Reich Morales, Martín; Leisen, Mathieu; Childress, Tristan M. (Society of Economic Geologists, USA, 2020)
      The textures of outcrop and near-surface exposures of the massive magnetite orebodies (>90 vol % magnetite) at the Plio-Pleistocene El Laco iron oxide-apatite (IOA) deposit in northern Chile are similar to basaltic lava ...
    • Sánchez Alfaro, Pablo; Reich Morales, Martín; Driesner, Thomas; Cembrano, Jose; Arancibia, Gloria; Pérez Flores, Pamela; Heinrich, Christoph A.; Rowland, Julie; Tardani, Daniele; Lange, Dietrich; Campos, Eduardo (Elsevier Science BV., 2016)
      Epithermal gold (Au) deposits result from the combination of a sustained flux of metal-rich fluids and an efficient precipitation mechanism. Earthquakes may trigger gold precipitation by rapid loss of fluid pressure but ...
    • González Jiménez, José; Plissart, Gaelle; Garrido, Leonardo; Padron Navarta, José; Aiglsperger, Thomas; Romero, Rurik; Marchesi, Claudio; Moreno Abril, Antonio; Reich Morales, Martín; Barra Pantoja, Fernando; Morata Céspedes, Diego (E Schweizerbartsche Verlagsbuchhandlung, 2017)
      Humite minerals, including Ti-rich, hydroxyl-dominant chondrodite and clinohumite, occur in Paleozoic antigorite serpentinite in the La Cabana area, in the Chilean Coastal Cordillera (similar to 38 degrees 30'S- 73 degrees ...
    • 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 ...
    • Reich Morales, Martín; Simon, Adam C.; Deditius, Artur P.; Barra, Fernando; Chryssoulis, Stephen; Lagas, Gonzalo; Tardani, Daniele; Knipping, Jaayke L.; Bilenker, Laura; Sánchez Alfaro, Pablo (Soc Economic Geologists, 2016)
      Although studies have proposed that iron oxide-apatite (IOA) deposits may represent the deeper roots of some Andean iron oxide copper-gold (IOCG) systems, their genetic links remain obscure and controversial. A key ...