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Variability over time in the sources of South Portuguese Zone turbidites: evide...
Pereira, Manuel Francisco; Ribeiro, Carlos; Vilallonga, Filipa; Chichorro, Martim; Drost, Kirsten; Silva, José Brandão; Albardeiro, Luis; Hofmann, MandyThis study combines geochemical and geochronological data in order to decipher the provenance of Carboniferous turbidites from the South Portuguese Zone (SW Iberia). Major and trace elements of 25 samples of graywackes and mudstones from the Mértola (Visean), Mira (Serpukhovian), and Brejeira (Moscovian) Formations were analyzed, and 363 U-Pb ages were obtained on detrital zircons from five samples of graywacke...
Pangaea amalgamation and break-up: new radiometric constraints on sediment prov...
Pereira, M. Francisco; Chichorro, Martim; Ribeiro, Carlos; Vilallonga, Filipa; Drost, Kerstin; Linnemann, Ulf; Hofmann, MandyThe subject of this provenance study are greywacke and sandstone strata that define a key unconformity in SW Iberia, where late Triassic strata (Algarve Basin) overlie previously deformed and metamorphosed late Carboniferous basement (South Portuguese Zone). This angular unconformity records the transition from Pangaea´s amalgamation to its break-up with: i) development of marine basins of Moscovian age with tu...
Denudation of SW Iberia during Pangea's break-up: geochemical and detrital zirc...
Pereira, M. Francisco; Ribeiro, Carlos; Vilallonga, Filipa; Chichorro, Martim; Drost, KerstinThis provenance study is mainly based on new whole-rock geochemistry data but also involves detrital zircon geochronology. More specifically, this study investigates the Early Mesozoic denudation of a Late Paleozoic mountain range and the coeval development of basins during Pangea break-up in SW Iberia. The relations with past dynamic Earth events in Western Europe also include the amalgamation of Pangea and t...
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