12 documents found, page 1 of 2
New Insights on the Upper Triassic Silves Group in Algarve Basin, Portugal: Pal...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Fernandes, PauloABSTRACT: This paper presents the results of palynostratigraphic studies in the Silves Group in the Algarve Basin, Portugal. From bottom to top comprises the Silves Sandstones, the Silves Marl-Carbonate Evaporitic Complex, and the Volcano-Sedimentary Series. This study aims to detail the age of the Silves Group, bracketing the Triassic-Jurassic transition, using palynology. For this purpose, 250 samples were co...
New insights on the upper triassic silves group in Algarve Basin, Portugal: pal...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Fernandes, PauloThis paper presents the results of palynostratigraphic studies in the Silves Group in the Algarve Basin, Portugal. From bottom to top comprises the Silves Sandstones, the Silves Marl-Carbonate Evaporitic Complex, and the Volcano-Sedimentary Series. This study aims to detail the age of the Silves Group, bracketing the Triassic-Jurassic transition, using palynology. For this purpose, 250 samples were collected fr...
New palynostratigraphical data of the Silves Group, Algarve Basin
Vilas Boas, Margarida; Fernandes, Paulo; Pereira, Zélia; Cirilli, SimonettaSUMÁRIO: Este trabalho mostra dados palinostratigráficos que permitem aperfeiçoar a idade do Grupo de Silves na Bacia do Algarve. O Grupo de Silves constitui a unidade sedimentar mais antiga desta bacia e foi depositado de forma discordante sobre os turbiditos do Carbonífero superior da Formação Brejeira, dobrados e falhados durante a Orogenia Varisca. Os novos dados obtidos, permitem-nos apontar o início da se...
Palynology and palynofacies studies in the lowermost Jurassic of the Lusitanian...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Duarte, L. V.; Sêco, Sérgio Luís Rodrigues; Fernandes, PauloABSTRACT: he Silves Group of the Lusitanian Basin in Portugal represents the initial infill of the continental rifting basins that formed during the breakup of northern Pangaea regions. Evaporites, especially halite, mark the transition from continental to marine settings and the beginning of the deposition in passive margin basins. This work presents the results of the palynostratigraphic and palynofacies anal...
Palynology and palynofacies studies in the lowermost Jurassic of the Lusitanian...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Duarte, Luís Vítor; Sêco, Sérgio Luís Rodrigues; Fernandes, PauloThe Silves Group of the Lusitanian Basin in Portugal represents the initial infill of the continental rifting basins that formed during the breakup of northern Pangaea regions. Evaporites, especially halite, mark the transition from continental to marine settings and the beginning of the deposition in passive margin basins. This work presents the results of the palynostratigraphic and palynofacies analysis of t...
The age of the first pulse of continental rifting associated with the breakup o...
Vilas Boas, Margarida; Paterson, Niall W.; Pereira, Zélia; Fernandes, Paulo; Cirilli, SimonettaABSTRACT: In this work, we report the first palynological age for the base strata of the Silves Sandstones of the Silves Group in the Algarve Basin, located in Southern Portugal. The group is the oldest sedimentary unit of the Algarve Basin and was deposited unconformably over late Pennsylvanian turbidites of the Mira Formation, which were folded and faulted during the Variscan Orogeny. The Silves Group compris...
The age of the first pulse of continental rifting associated with the breakup o...
Vilas Boas, Margarida; Paterson, Niall W.; Pereira, Zélia; Fernandes, Paulo; Cirilli, SimonettaIn this work, we report the first palynological age for the base strata of the Silves Sandstones of the Silves Group in the Algarve Basin, located in Southern Portugal. The group is the oldest sedimentary unit of the Algarve Basin and was deposited unconformably over late Pennsylvanian turbidites of the Mira Formation, which were folded and faulted during the Variscan Orogeny. The Silves Group comprises a detri...
Palynostratigraphy of the Triassic-Jurassic of the Silves Group, Lusitanian Bas...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Duarte, L. V.; Fernandes, PauloABSTRACT: We studied the miospore assemblage from an Upper Triassic to Lower Jurassic succession of the Silves Group near Coimbra, Portugal. The latter consists of, from base to top, the Conraria, Penela, Castelo Viegas, and the Pereiros formations. The palynological assemblages allowed establishing an informal palynozonation and providing new biostratigraphic that helped constrain the age attribution to the Si...
New data on the palynology of the Triassic Jurassic boundary of the Silves Grou...
Vilas Boas, Margarida; Pereira, Zélia; Cirilli, Simonetta; Duarte, L. V.; Fernandes, PauloABSTRACT: New evidence is presented on the Triassic-Jurassic boundary in the northern Lusitanian Basin, Portugal, based on miospore assemblages from a composite Upper Triassic to Lower Jurassic succession of the Silves Group. The latter comprises, from base to top, the Conraria, Penela, Castelo Viegas and the Pereiros formations. Three informal palynological zones have been documented and compared with coeval p...
Assessing Thermal Maturity through a Multi-Proxy Approach: A Case Study from th...
Spina, Amália; Cirilli, Simonetta; Sorci, Andrea; Schito, Andrea; Clayton, Geoff; Corrado, Sveva; Fernandes, Paulo; Galasso, FrancescaABSTRACT: This study focuses on the thermal maturity of Permian deposits from the Zagros Basin, Southwest Iran, employing both optical methods (Thermal Alteration Index, Palynomorph Darkness Index, Vitrinite Reflectance, UV Fluorescence) and geochemical analyses of organic matter (Rock Eval Pyrolysis and MicroRaman spectroscopy) applied to the Faraghan Formation along two investigated Darreh Yas and Kuh e Farag...