Search Results - "Valladares, M. I"

The Ediacaran-Cambrian transition in the Cantabrian Zone (northern Spain); sub-Cambrian weathering, K-metasomatism and provenance of detrital series by Ugidos, J. M, Barba, P, Valladares, M. I, Suárez, M, Ellam, R. M

“…The Upper Ediacaran detrital succession in the Cantabrian Zone shows geochemical and mineralogical changes resulting from sub-Cambrian weathering during the…”
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Upper Neoproterozoic-Lower Cambrian sedimentary successions in the Central Iberian Zone (Spain): sequence stratigraphy, petrology and chemostratigraphy. Implications for other European zones by Valladares, M. I., Barba, P., Ugidos, J. M., Colmenero, J. R., Armenteros, I.

“…The Upper NeoproterozoicLower Cambrian sedimentary succession in the central areas of the Central Iberian Zone has been subdivided into 12 mostly siliciclastic…”
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Geochemistry of the Upper Neoproterozoic and Lower Cambrian siliciclastic rocks and U-Pb dating on detrital zircons in the Central Iberian Zone, Spain by Ugidos, J. M., Billstr m, K., Valladares, M. I., Barba, P.

“…Sandstones and shales from the Upper Neoproterozoic (UN) succession in the Central Iberian Zone (CIZ) show parallel REE patterns and relatively restricted and…”
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The Upper Neoproterozoic–Lower Cambrian of the Central Iberian Zone, Spain: chemical and isotopic (Sm-Nd) evidence that the sedimentary succession records an inverted stratigraphy of its source by Ugidos, J.M., Valladares, M.I., Barba, P., Ellam, R.M.

“…The Upper Neoproterozoic–Lower Cambrian sedimentary succession in the Central Iberian Zone has recently been divided into 12 sedimentary units (I to XII)…”
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Contrasting geochemical features of the Central Iberian Zone shales (Iberian Massif, Spain): implications for the evolution of Neoproterozoic–Lower Cambrian sediments and their sources in other peri-Gondwanan areas by Valladares, M.I., Ugidos, J.M., Barba, P., Colmenero, J.R.

“…More than 90 samples of shales have been collected for geochemical purposes from Neoproterozoic and Lower Cambrian sedimentary series in an extensive area of…”
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Provenance of Upper Precambrian-Lower Cambrian shales in the Central Iberian Zone, Spain: evidence from a chemical and isotopic study by Ugidos, J.M., Valladares, M.I., Recio, C., Rogers, G., Fallick, A.E., Stephens, W.E.

“…Geochemical and isotopic (Sr, Nd, O) data are presented for Upper Precambrian and Lower Cambrian shale sequences from the Central Iberian Zone, Spain, in order…”
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Geochemistry and petrology of recycled orogen-derived sediments: a case study from Upper Precambrian siliciclastic rocks of the Central Iberian Zone, Iberian Massif, Spain by Ugidos, J.M., Armenteros, I., Barba, P., Valladares, M.I., Colmenero, J.R.

“…Two areas of Upper Precambrian siliciclastic rocks separated from each other by 150 km were selected in the Central Iberian Zone (CIZ) for a petrological and…”
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Siliciclastic-carbonate slope apron in an immature tensional margin (Upper Precambrian-Lower Cambrian), Central Iberian Zone, Salamanca, Spain by Valladares, M.I.

“…The Middle (upper Vendian) and Upper Series (Lower Cambrian) of the central part of the Central Iberian Zone of the Iberian Massif comprise for the most part…”
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Upper Neoproterozoic series in the Central Iberian, Cantabrian and West Asturian Leonese Zones (Spain): Geochemical data and statistical results as evidence for a shared homogenised source area by Ugidos, J.M., Sánchez-Santos, J.M., Barba, P., Valladares, M.I.

“…Analyses (100) of six groups of Upper Neoproterozoic shales from different areas in Central and Northern Spain covering an extension of over 60,000 km 2 reveal…”
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Oxygen, carbon and strontium isotope records of Ediacaran carbonates in Central Iberia (Spain) by Valladares, M.I., Ugidos, J.M., Barba, P., Fallick, A.E., Ellam, R.M.

“…Carbon, oxygen and strontium isotope ratios were determined in the uppermost Neoproterozoic carbonate rocks at Pastores (SW Salamanca, Central Iberia). The low…”
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