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Type: Artigo de periódico
Title: The Project Ptdc/cte-gix/098968/2008 - High Resolution Stratigraphy Of The Lower Jurassic Organic-rich Marine Series In The Lusitanian Basin (portugal): Initial Expectations And Results [o Projecto Ptdc/cte-gix/098968/2008 - Estratigrafia De Alta Resolução Das Séries Marinhas Ricas Em Matéria Orgânica Do Jurássico Inferior Da Bacia Lusitânica: Perspectivas Iniciais E Resultados Obtidos]
Author: Duarte L.V.
Silva R.L.
Mendonca Filho J.G.
Azeredo A.C.
Cabral M.C.
Comas-Rengifo M.J.
Correia G.
Ferreira R.
Loureiro I.M.
Paredes R.
Pereira A.
Pocas Ribeiro N.
Abstract: This work presents the main results of the Project "High resolution stratigraphy of the Lower Jurassic organic-rich marine series in the Lusitanian Basin (Portugal)", supported by the Portuguese Foundation for Science and Technology. This project was focused on a multidisciplinary stratigraphic analysis based on the study of a range of biotic and abiotic parameters of the Lower Jurassic marl-limestone succession rich in organic matter, embracing seven main objectives: 1. Sedimentological (mineralogical, textural and compositional) and sequential analysis of the whole Lower Jurassic hemipelagic succession (Upper Sinemurian-Toarcian); 2. Ammonite biostratigraphic precisions of the Upper Sinemurian and Upper Pliensbachian; 3. Palaeontological and palaeoecological analysis of the benthic macrofauna (especially brachiopods and bivalves); 4. Biostratigraphical, taxonomic and palaeoecological analysis of the ostracod fauna (Sinemurian-Toarcian); 5. Chemostratigraphic analysis based mainly on carbon stable isotopes (Sinemurian-Pliensbachian); 6. Organic geochemical and petrographic analysis (total organic carbon, palynofacies, Rock-Eval pyrolysis and biomarkers) of the Sinemurian-Pliensbachian; 7. Vertical variation patterns of gamma-ray analysis (Sinemurian- Toarcian). Besides the new results in each specific scientific domain (for example, biostratigraphy, palaeoecology, sedimentology, sequence stratigraphy and cyclicity, chemostratigraphy and organic geochemistry), the integration of all data, in several cases at highresolution level, allows emphasizing the achievement of two main transverse goals: the improvement of the stratigraphy and sedimentary knowledge of the Lower Jurassic series of western Iberia margin, with implications in the palaoenvironmental and palaeoceanographic interpretations of the Tethyan pre-Atlantic basins dynamics and global correlation; taking into consideration the huge number of organic geochemical parameters analyzed, the results of this research contributed significantly to understand the role of the different Sinemurian and Pliensbachian organic-rich intervals as potential hydrocarbon generation sources (quality of organic matter and maturation). © 2013 LNEG - Laboratório Nacional de Geologia e Energia IP.
Rights: fechado
Identifier DOI: 
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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