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Variability over time in the sources of South Portuguese Zone turbidites: evide...

This 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...

Sedimentary provenance of Neogene strata from the SW Portuguese coast (Sines Ca...

In this preliminary study of provenance analysis Neogene sandstones and conglomerates of the Alvalade Basin were sampled, from the sea cliffs nearby the Sines Cape (SW Portuguese Coast). Detrital zircons were extracted by conventional methods of particle size separation, magnetic and heavy liquids separation. Detrital zircons were dated by U-Pb method with LA-ICPMS. The U-Pb geochronology results indicate as po...

Provenance analysis of the Late Ediacaran basins from SW Iberia, Serie Negra Su...

Provenance analysis of Lower Paleozoic siliciclastic rocks of SW Iberia (Ossa-M...

Provenance of Cambro-Ordovician siliciclastic rocks of the SW Iberia : insights...

The provenance of Late Ediacaran and Early Ordovician siliciclastic rocks in the

U–Pb geochronology of detrital zircon from Late Ediacaran (Beiras Group greywackes) and Early Ordovician (Sarnelhas arkosic quartzites and Armorican quartzites of Penacova) sedimentary rocks of the southwest Central Iberian Zone (SW CIZ) constrain the evolution of northern Gondwana active-passive margin transition. The LA-ICP-MS U–Pb data set (375 detrital zircons with 90–110% concordant ages) is dominated by N...

The provenance of Late Ediacaran and Early Ordovician siliciclastic rocks in th...

Detrital zircon age constraints on the sediment provenance of Variscan basins i...

The mid- to late-Devonian Rheic suture between the Laurussia and Gondwana blocks that combined to form Pangea, can be traced along the Variscan orogenic belt across Western-Central Europe. In southwest Iberia, there are, however, no magmatic arc rocks that can be related to the closure, by subduction of its oceanic lithosphere, of the Rheic Ocean. The only magmatism recorded on both sides of the suture is of ea...

. U-Pb detrital zircon ages from the Beiras Group: Implications for the Neoprot...

U-Pb detrital zircon ages from the Beiras Group greywackes (SW Central Iberian Zone - CIZ) indicate a maximum depositional age of late Ediacaran (c. 560-578 Ma). Two salient features distinguish the Beiras Group from the Série Negra greywackes (age equivalent from the Ossa-Morena Zone - OMZ): i) The presence of Tonian and Mesoproterozoic (<8%) age clusters in the Beiras Group greywackes, that are almost absent ...

Pangaea amalgamation and break-up: new radiometric constraints on sediment prov...

The 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...