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Juan A. Dahlquist
Pág. 147 - 161
A petrological and geochemical study of Lower Ordovician epidote-bearing granitoids of the Sierra de Chepes (Famatinian Orogen, Sierras Pampeanas, Argentina) indicates low-pressure emplacement of these extensive metaluminous suites. Textural relationship...
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Dmitry A. Ruban
New investigations in the Western Caucasus contribute to the understanding of granite pseudokarst (sensu lato) and megaclasts linked to river erosion. A plot on the bank of the Belaya River (Mountainous Adygeya, Western Caucasus) was selected to examine ...
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Alvaro Rodrigo Iriarte,Umberto Giuseppe Cordani,Kei Sato
Pág. 403 - 441
The Cordillera Real granitoids are a suite of Triassic and Oligocene plutons in the core of the Eastern Cordillera of the Central Andes of Bolivia. Their tectonic setting, chemical and ore compositions make them part of the so-called ?Inner Magmatic Arc?...
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Jaana Halla
The Archaean (4.0–2.5 Ga) continental crust is mainly composed of granitoids, whose geochemical characteristics are a function of their formation mechanisms and components, as well as physical conditions of their source. Therefore, revealing change...
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Jiahao Li, Xing Ding and Junfeng Liu
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Constantino Mpodozis,Suzanne Mahlburg Kay
Pág. 153 - 180
ABSTRACT. The batholiths of the Andean Cordillera in the Atacama and Coquimbo Regions (28-31°S) reflect tectonic processes associated with the evolving margin of the Gondwana supercontinent. The batholiths consist of the Carbonilerous-Lower Permian Elqui...
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Eugenio Fazio, Patrizia Fiannacca, Damiano Russo and Rosolino Cirrincione
Late-Variscan granitoid rocks of trondhjemitic and granitic composition, intruded in migmatitic paragneisses in the north-eastern Peloritani Mountains (southern Italy) at ~310 Ma and ~300 Ma, respectively, exhibit a range of deformation microstructures d...
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Victor Maksaev,Javier Arancibia,Francisco Munizaga,Colombo Tassinari
Pág. 285 - 312
U-Pb detrital-zircon geochronology of two discrete outcrops of mica schists of the western border of the Domeyko Cordillera in the Region of Atacama, northern Chile, indicates that the maximum age of sedimentation of their protolith corresponds to the La...
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Katja Deckart,Estanislao Godoy,Alfredo Bertens,Ayesha Saeed
Pág. 1 - 31
Four Middle-to-Late Miocene barren plutonic complexes that occur between the giant porphyry copper deposits of the central Chilean Andes were selected for U-Pb LA-ICPMS geochronology and Hf-isotope systematics on single zircon grains. Major and trace ele...
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Ivana A. Urraza,Laura E. Grecco,Sergio H. Delpino,Monica L. Arrese,Carlos W. Rapela
Pág. 98 - 118
In the present contribution, the partial results of a detailed study of the magmatic, metamorphic and tectonic events developed in the Aluminé Igneous-Metamorphic Complex (AIMC) are given. We define the AIMC as the set of pre-andean and andean intrusive ...
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Ivan Garrido,Jose Cembrano,Armando Sina,Peter Stedman,Gonzalo Yanez
Pág. 43 - 54
The Andean segment between 31 and 34°S documents a unique Tertiary tectono-magmatic evolution that involves the generation of three world-class Late Miocene porphyry copper deposits: Los Pelambres, Río Blanco-Los Bronces and El Teniente. The genesis of t...
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Luis Ribba,Constantino Mpodozis,Francisco Herve,Carlo Nasi,Ramon Moscoso
Pág. 129 - 149
RESUMEN. En el valle del Transito, al este de Vallenar (29°S) afloran rocas paleozoico-triasicas, metamorficas e intrusivas. Las mas antiguas son ortoneises granodioriticos, de probable edad silurica (Neises de La Pampa, NPL; isocrona Rb-Sr, roca total, ...
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Gerardo E. Bossi,Sergio M. Georgieff,Claudia M. Muruaga,Lucia M. Ibanez,Javier G. Sanagua
Pág. 172 - 196
The Las Cumbres Formation (Plio-Pleistocene) crops out extensively between the Zapata -Vinquis Ranges to the north and the Paimán-Velasco Ranges to the south (La Rioja and Catamarca Provinces, NW-Argentina) conformably overlying the Salicas Formation of ...
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Ricardo Varela,Luis Dalla Salda,Carlos Cingolani,Veronica Gomez
Pág. 147 - 163
RESUMEN. Se presenta un estudio del basamento cristalino integrado por las Metamorfitas Cushamen, los Granitoides Mamil Choique y una serie granitica postectonica, representantes de un ciclo mayor tecto-termico que evoluciono entre el Paleozoico Inferior...
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Davide Lenaz, Matteo Velicogna, Maurizio Petrelli and Birger Schmitz
In the Ordovician limestone of the Thorsberg quarry (South Sweden), about 130 meteorites have been found. Among the extraterrestrial material, several terrestrial Cr-spinels and zircons have been found too. In particular, in the interval 416?447 cm above...
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Leda Sanchez Bettucci,Umberto Giuseppe Cordani,Judith Loureiro,Elena Peel,Santiago Fort,Kei Sato
Pág. 442 - 471
A U-Pb SHRIMP zircon geochronological study was carried out in the Nico Pérez Terrane in the central-eastern portion of Uruguay with the aim of constraining its geological evolution and its cratonic affinity. Nico Pérez Terrane is made up by a mosaic of ...
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Christopher Adams
Pág. 442 - 454
Latest Precambrian to Ordovician metasedimentary successions and Cambrian-Ordovician and Devonian-Carboniferous granitoids form the major part of the basement of southern Zealandia and adjacent sectors of Antarctica and southeast Australia. Uplift/coolin...
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Francisco Hervé,Mauricio Calderón,Mark Fanning,Robert Pankhurst,Carlos W. Rapela,Paulo Quezada
Pág. 301 - 317
Previous work has shown that Devonian magmatism in the southern Andes occurred in two contemporaneous belts: one emplaced in the continental crust of the North Patagonian Massif and the other in an oceanic island arc terrane to the west, Chaitenia, which...
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Stella Poma,Eduardo O. Zappettini,Sonia Quenardelle,Joao O. Santos,?Magdalena Koukharsky,Elena Belousova,Neal J. McNaughton
Pág. 267 - 292
We have carried out zircon U-Pb SHRIMP dating and Hf isotope determinations as well as geochemical analyses on three plutonic units of Gondwanan magmatism that crop out in NW Argentina. Two episodes of different age and genesis have been identified. The ...
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Hans Niemeyer,Carlos Urrutia
Pág. 37 - 50
The north-south trending Cordillera de Domeyko Fault System in northern Chile considered herein is parallel to the Peru-Chile trench. The displacement history of the Sierra de Varas Fault, a master fault of the mentioned system, was examined in detall in...
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