Jurassic tectono-sedimentary evolution of the Northern Lusitanian Basin (offshore Portugal)

Alves, Tiago Marcos; Gawthorpe, Robert L.; Hunt, David; Monteiro, J. H.

doi:10.1016/s0264-8172(02)00036-3

Cited by 118 publications

(138 citation statements)

References 26 publications

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“…10). The Brenha Group, described in the well reports, comprises a thick (> 1500 m) marine sequence deposited during the late Sinemurian-late Callovian time interval (see Alves et al, 2002) which is subdivided into several equivalent units at the surface (Azerêdo, 2007;Azerêdo et al, 2003;Duarte and Soares, 2002).…”

Section: Sequence Stratigraphy and Subsurface Data Correlationmentioning

confidence: 99%

Outcrop gamma-ray spectrometry: Applications to the Sinemurian–Pliensbachian organic-rich facies of the Lusitanian Basin (Portugal)

Correia

Duarte

Pereira

et al. 2013

Journal of Iberian Geology

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This work provides detailed information of outcrop gamma-ray logging from the Sinemurian-Pliensbachian organic-rich units (Água de Madeiros and Vale das Fontes formations) of the Lusitanian Basin, which are recognized as one of the most important potential oil source rocks interval of Portugal. The study included total and spectral gamma-ray measurements in outcrop and laboratory, Total Organic Carbon (TOC) content and whole-rock mineralogical characterization by X-ray diffraction, carried out in the two most important outcrop areas of the Western Lusitanian Basin (S. Pedro de Moel and Peniche). The outcrop data was compared with subsurface information.The results show high variability of the gamma radiation (26 to 210 cps) and radioactive elements associated with the lithological, mineralogical and geochemical differences. The TOC data yielded the organic matter enrichment of both formations, where the highest values are observed in the Água de Madeiros Formation (maximum=20.4%). The highest U concentration (11 ppm) is consistent with the highest Total Organic Carbon peak mainly supported by the precipitation of authigenic U (10 ppm). The majority of the analysed samples show an obvious authigenic U enrichment, especially in the Água de Madeiros Formation where it represents the main component of the total U content. A highly significant U/TOC correlation (r up to 0.87) with a low ratio (0.3-0.7 ppm/wt.%TOC) was obtained, confirming that U content can be used as a proxy for organic richness in the studied depositional system. The gamma-ray tool was also useful in the identification of 2 nd order Transgressive-Regressive facies cycles (and maximum flooding surfaces) and in the correlation between outcrop and subsurface data.

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Section: Sequence Stratigraphy and Subsurface Data Correlationmentioning

confidence: 99%

Outcrop gamma-ray spectrometry: Applications to the Sinemurian–Pliensbachian organic-rich facies of the Lusitanian Basin (Portugal)

Correia

Duarte

Pereira

et al. 2013

Journal of Iberian Geology

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“…Genetically, the Lusitanian Basin is a syn−rift basin re− lated to the opening of the Atlantic Ocean, and is situated at a passive continental margin (e.g., Wilson 1975;Wilson et al 1989;Alves et al 2002). The basin started to open in the Late Triassic and is partitioned into a northern (NLB), central (CLB), and southern (SLB) sector by two reactivated Varis− can major faults, i.e., the Nazaré and Tagus faults.…”

Section: Geographic and Geological Overviewmentioning

confidence: 99%

“…The basin started to open in the Late Triassic and is partitioned into a northern (NLB), central (CLB), and southern (SLB) sector by two reactivated Varis− can major faults, i.e., the Nazaré and Tagus faults. Triggered by rapid rifting during the Late Jurassic, the basin began to differentiate into several subbasins, which developed as a re− sult of diapirism that led to the formation of salt diapirs pre− dominantly along lineaments of Variscan origin (Alves et al 2002(Alves et al , 2006Carvalho et al 2005). Today, the Lusitanian Basin is filled with sediments of Late Triassic to Pleistocene age.…”

Section: Geographic and Geological Overviewmentioning

confidence: 99%

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Taxonomy and biostratigraphy of the Late AlbianActinoceramus sulcatuslineage (Early Cretaceous Bivalvia, Inoceramidae)

Crampton

Gale

2009

J. Paleontol.

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TheActinoceramus sulcatuslineage (Parkinson, 1819) (Bivalvia: Inoceramidae) is a very distinctive and abundant component of late Albian (Early Cretaceous) molluscan assemblages that is found throughout Europe, Central Asia, Japan and the Far East of Russia, southern and western North America, South Africa, and possibly India, in a range of shallow- to deep-marine facies. The lineage encompasses a wide and continuous range of morphologies that provide evidence of phyletic evolution at varying rates combined with large ecophenotypic plasticity within populations. The evolution ofA. sulcatusmarks the oldest appearance of well-developed radial folds and sulci within the Inoceramidae. The range of morphological variation makes formal taxonomic subdivision of the group problematic. Here we use a combination of formal successional subspecies and informal morphotypes to subdivide the lineage into the following taxa:A. sulcatusformasulcatus, A. sulcatusformasubsulcatus(Wiltshire, 1869),A. sulcatusformamunsoni(Cragin, 1894), andA. sulcatus biometricusCrampton, 1996. Within these taxa and morphotypes, we synonymise a large number of earlier names that have been applied to variants within the lineage. Each of the forms recognized has biostratigraphic utility and we describe four new lineage biozones, in ascending order:A. concentricus parabolicus, A. sulcatus, A. sulcatusformamunsoni, andA. sulcatus biometricusbiozones. The lowest occurrence ofA. sulcatusis approximately coincident with the base of the upper Albian as currently defined, at least throughout most of Europe, and this datum provides a valuable tool in correlation. The nature of radial folds within theA. sulcatuslineage poses interesting but still unanswered questions regarding shell morphogenesis in bivalves and the functional significance (if any) of radial folds in the Inoceramidae.

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“…In tectonically active sedimentary basins, the rate, magnitude and style of tectonic movements plays a key role in determining the locations of sediments sources, the depositional facies and the strata architecture (Gawthorpe and Leeder, 2000;Dorsey et al, 2001;Lin et al, 2001 andAlves et al, 2002;Leeder, 2011;Hou et al, 2012), although the effects of relative base level changes can still be important (Howell and Flint,1996;Dorsey and Umhoefer, 2000).…”

Section: Introductionmentioning

confidence: 99%

Relative role of accommodation zones in controlling stratal architectural variability and facies distribution: Insights from the Fushan Depression, South China Sea

Liu

Wang

et al. 2015

Marine and Petroleum Geology

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Jurassic tectono-sedimentary evolution of the Northern Lusitanian Basin (offshore Portugal)

Cited by 118 publications

References 26 publications

Outcrop gamma-ray spectrometry: Applications to the Sinemurian–Pliensbachian organic-rich facies of the Lusitanian Basin (Portugal)

Outcrop gamma-ray spectrometry: Applications to the Sinemurian–Pliensbachian organic-rich facies of the Lusitanian Basin (Portugal)

Taxonomy and biostratigraphy of the Late AlbianActinoceramus sulcatuslineage (Early Cretaceous Bivalvia, Inoceramidae)

Relative role of accommodation zones in controlling stratal architectural variability and facies distribution: Insights from the Fushan Depression, South China Sea

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