Browsing by Author "XX676128"

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Artículo

Characterisation of aerosol from Santiago, Chile: an integrated PIXE–SEM–EDX study

Polve, M.; Valdés, A.; Belmar Urbina, Mauricio; Dinator Ramírez, María Inés; Silva, M.; Morata Céspedes, Diego; Leiva, M. A.; Aigouy, T.; Morales, J. R. (Springer, 2007-12-05)

Abstract Santiago de Chile is a big city with huge air quality problems, being one of the most polluted cities in the world. This is aggravated during winter by the topography and meteorological conditions of the city. ...
Artículo

Geochronology of very low-grade Mesozoic Andean metabasites; an approach through the K–Ar, 40Ar/39Ar and ...

Oliveros, Verónica; Aguirre Le-Bert, Luis; Morata Céspedes, Diego; Simonetti, Antonio; Vergara Martínez, Mario; Belmar Urbina, Mauricio; Calderón, Sergio (The Geological Society, 2008)

Multiple geochronological methods using different metamorphic minerals were combined to date the regional, very low-grade metamorphism affecting Upper Jurassic–Lower Cretaceous volcano-sedimentary successions in the Andes ...
Artículo

High T/P evolution and metamorphic ages of the migmatitic basement of northern Sierras Pampeanas, Argentina: ...

Larrovere, Mariano A.; Hoyos, Camilo R. de los; Toselli, Alejandro J.; Rossi, Juana N.; Basei, Miguel A.S.; Belmar Urbina, Mauricio (Elsevier, 2011)

New petrologic, thermobarometric and U-Pb monazite geochronologic information allowed to resolve the metamorphic evolution of a high temperature mid-crustal segment of an ancient subduction-related orogen. The El Portezuelo ...
Artículo

Manganese nodules in the Miocene Bahía Inglesa Formation, north-central Chile: Petrography, geochemistry, ...

Achurra, L. E.; Lacassie Reyes, Juan Pablo; Le Roux, Jacobus; Marquardt, C.; Belmar Urbina, Mauricio; Ruiz del Solar, Javier; Ishman, S. E. (Elsevier, 2009)

Manganese nodules recovered from two stratigraphic horizons of Tortonian–Messinian (late Miocene) age in the Bahía Inglesa Formation of north-central Chile were studied using XRD, SEM and geochemical analysis. The dominant ...
Artículo

Nature and P-T-t constraints of very low-grade metamorphism in the Triassic-Jurassic basins, Coastal Range, ...

Belmar Urbina, Mauricio; Morata Céspedes, Diego (SERVICIO NACIONAL GEOLOGIA MINERVA, 2005-07)

Triassic-Jurassic volcano-sedimentary sequences in the Coastal Range of central Chile (34 degrees 45/35 degrees 20'S) from the Vichuquen-Tilicura and Hualane-Gualleco basins display metamorphic assemblages indicative of ...
Artículo

P-T-t evolution of an Early Silurian medium-grade shear zone on the west side of the Famatinian magmatic ...

Castro de Machuca, Brígida; Arancibia, Gloria; Morata Céspedes, Diego; Belmar Urbina, Mauricio; Previley, L.; Pontoriero, S. (ELSEVIER, 2008-03)

The geodynamic evolution of the proto-Andean margin of Gondwana during the Paleozoic was characterized by repeated subduction processes associated with the docking of several terranes, including the Cuyania-Precordillera ...