Download or read book High resolution 3d Stratigraphic Modelling of the Gresse en vercors Lower Cretaceous Carbonate Platform SE France written by Rémy Richet and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbonate platforms are characterized by complex sedimentary and stratigraphic architectures that can be expressed at length scale exceeding single outcrops. This work focuses on the Barremian (Lower Cretaceous) deposits of the Gresse-en-Vercors cliff (southeastern France) that provide a seismic-scale slice though a platform margin - analogous to Middle East reservoirs - ideal to study large scale carbonate platform developments in continuous. The cliffs are 500 m high and extend for 25 km along depositional dip, straddling the transition from shallow water platform to deeper basin. New biostratigraphical data shows that the Vercors platform is mainly Lower Barremian. Four stratigraphic sequences were defined, with two complete platform stages, separated by three drowning events.New high-resolution numerical data (LIDAR point-set and high-resolution georeferenced photos) obtained by helicopter survey, allowed the realization of a 3D high-resolution DEM over the entire outcrops. Integrating the stratigraphic observations and the DEM in gOcad result in a continuous 3D stratigraphic architecture and facies model of the carbonate outcrop that can be used for stratigraphic and sedimentological interpretations. The resulting geological model demonstrates that outcrop numerical data and 3D geological modeling are pertinent tools for improving carbonate outcrop characterization and conceptual models of carbonate platform systems. It allows to establish subtle sedimentary profiles and high resolution facies mosaic along seismic scale platform trend. This approach is particularly critical for the 3D characterization of clinoforms and stratigraphic system tracts in non-cylindrical carbonate systems: for example, apparent low stand wedge or distal onlapping lobes in 2D are in reality prograding high stand systems in 3D.

Download or read book Vercors French Alps written by and published by . This book was released on 1996* with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vercors France Sequence Stratigraphy of an Early Cretaceous Carbonate Platform written by Thierry Jacquin and published by . This book was released on 1994 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Sequence Stratigraphic Concepts to the Cretaceous Urgonian Carbonate Platform Southeast France written by David William Hunt and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbonate platforms are increasingly being studied using sequence stratigraphic concepts and models borrowed from the study of siliciclastic shelves in passive margin settings. The direct transposition of the stratigraphic model for a siliciclastic shelf to its carbonate counterpart, the carbonate shelf, assumes that the two systems respond in a very similar way to changes of relative sea-level, the interpreted major control upon depositional stacking patterns. Current models depicting the sequence stratigraphic evolution of carbonate shelves are and have been frequently applied without regard for the differences between the siliciclastic and carbonate shelf depositional systems. It is the purpose of this study to test the current sequence stratigraphic model and its assumptions for a carbonate shelf. Carbonate shelves do differ quite fundamentally from their siliciclastic equivalents. The carbonate shelf has the capacity to respond in quite different ways to changes in relative sea-level, compared to siliciclastic systems, as a result of the strong physio-chemical control upon carbonate sedimentation and the potential high rates of carbonate production at the shelf margin in comparison to rates of relative sea-level rise. Carbonate sedimentation rates are also differential across a shelf and highly sensitive to slight environmental' changes such as nutrient upwelling and temperature increases or decreases. This can lead to abrupt changes of sedimentation rate not necessarily related to changes of relative sea-level. Because of these differences carbonate shelves can develop stratal patterns similar to siliciclastic settings, but in the majority of cases they are very different. In direct contrast to siliciclastic systems the lowstand systems tract is normally impoverished on the flanks of carbonate shelves. Two different end-members of lowstand sedimentation are distinguished for carbonate shelves and these reflect the inherited morphology of the slope: low angle, mud-dominated slopes are characterized by basin-floor slides and debrites during times of falling relative sea-level and by a relatively large volume autochthonous slope wedge. In direct contrast, high angle slopes are characterized by basin-floor megabreccias and volumetrically very small or even absent autochthonous slope wedges. The carbonate transgressive systems tract can also develop a wide variety of stratal patterns, a reflection of the often complex interplay of variable sedimentation rates and rates of relative sea-level rise. Two different types of geometric stacking pattern are distinguished: type 1 geometries, developed when sedimentation rates are less than rates of relative sea-level rise, and type 2 geometries formed when sedimentation rates are equal to or greater than rates of relative sea-level rise. The highstand systems tract is the time of maximum carbonate production potential and is normally associated with rapid basinwards progradation. For the highstand systems tract two different types of foreslope progradation are distinguished, slope aprons and toe-of-slope aprons. These differences between carbonate and siliciclastic depositional models suggest that simple application of the previously published models can lead to incorrect interpretation of systems tracts, sequences and therefore relative sea-level curves. Sequence stratigraphic models and concepts are tested by application to the spectacular seismic scale exposures of the mid-Cretaceous Urgonian platform, SE France. The platform is divided into a lower regressive' part, the Glandasse Formation and an upper 'transgressive' part the Urgonian Limestone Formation. These are dominated by progradational outer-shelf grainstone facies and aggradational shelf-lagoonal facies respectively. Criteria are developed to identify key surfaces and stratal packages upon the Urgonian platform. On the shelf sequence boundaries are readily defined and are marked by sub-aerial exposure surfaces associated with meteoric diagenesis. Lowstand sedimentation is generally absent, but can be represented by lacustrine facies. Strong erosional truncation is only developed on the shelf if siliciclastics are introduced during lowstand of sea-level. Thus, the transgressive and highstand systems tracts dominate shelf sedimentation but can only be distinguished if a clear flooding surface is developed, and this is not always the case. On the slope large-scale erosional surfaces developed by sedimentary bypass and/or slope collapse can develop at any stage of a sequence and make identification of the sequence boundary more difficult Similarly, on the basin-floor allochthonous debris derived from slope collapse and/or bypassing is not restricted to times of falling relative sea-level. From the criteria developed for identification of key stral surfaces and packages a sequence stratigraphy for the Urgonian platform is built This is placed within the time scale of Haq et al. (1987), and relative sea-level curves for the platform are constructed. These are compared to the eustatic sea-level charts from which they differ significantly. Minimum aggradation rates are also compared to other well known ancient carbonate platforms, from which the Urgonian is shown to have very high sedimentation rates.

Download or read book Jurassic and Cretaceous Stratigraphy and Sedimentary Evolution of the Julian Alps NW Slovenia written by Andrej Šmuc and published by Založba ZRC. This book was released on 2005-01-01 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphic Architecture of the Vercors Carbonate Margin SE France written by Katie Joe McDonough and published by . This book was released on 1997 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Resolution Sequence Stratigraphy and Sedimentology of the Lower Cretaceous Nanton Formation Ostracode Zone with Implications for Hydrocarbon Generation Kinetics and Quantitative Basin Modeling Western Canada Foreland Basin written by Nadir Taskin Akpulat and published by . This book was released on 2003 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cyclic Stratigraphy of Two Intervals at the Boundaries of a 3rd Order Sequence Lower Cretaceous Berriasian in the French Jura France and the Dorset Coast England written by Jeffrey S. Seier and published by . This book was released on 2002 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distribution of Sedimentary Organic Matter and Sequence Stratigraphy in Upper Jurassic Carbonates of Southeast France written by Luca Bombardiere and published by . This book was released on 1998 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: De plus, les corrélations latérales des paramètres organiques ont permis de distinguer les signatures observables dans tout le bassin par rapport à celles détectables localement.

Download or read book 3D Stratigraphic and Seismic Forward Modeling of Syn rift Carbonate Platforms Evolution written by Isabella Masiero and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Cretaceous Urgonian Carbonate Platform of the NW Subalpine Chains of SE France written by Guy Hamilton Spence and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report of Second Stratigraphic Working Group s Field Survey of 1964 written by Central Treaty Organization. Stratigraphic Working Group and published by . This book was released on 1969 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cretaceous Stratigraphy of Raukumara Peninsula written by Colin Mazengarb and published by . This book was released on 1993 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Resolution Sequence Stratigraphy and Sedimentology of the Lower Cretaceous Nanton Formation Ostracode Zone with Implications for Hydrocarbon Generation Kinetics and Quantitative Basin Modelling Western Canada Foreland Basin written by Nadir Taskin Akpulat and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphic Evolution of Lower Jurassic Carbonate Platforms written by Paul D. Crevello and published by . This book was released on 1990 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stratigraphic Architecture and Associated Sedimentological and Geochemical Variability in the Upper Cretaceous Eagle Ford Group South Texas written by Ahmed Wasel Alnahwi and published by . This book was released on 2018 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed, rock-based investigation of three Upper Cretaceous Eagle Ford Group cores situated behind (L1), at (L2), and downdip (L3) of the Lower Cretaceous Stuart City paleoreef-shelf margin in south Texas was conducted to understand stratigraphic, sedimentological, and geochemical relationships. An understanding of stratigraphic, sedimentological, and geochemical variability across the ancestral shelf margin is currently lacking. The Cenomanian–Turonian Eagle Ford Group is composed predominantly of calcareous mudstones that were deposited below storm-wave base on the drowned South Texas Shelf. The Lower to Upper Eagle Ford contact approximates the Cenomanian–Turonian boundary, at which the OAE-2 occurred and was identified in all three cores. The low-relief raised rim of the paleoshelf margin may have acted as a barrier, dividing the Eagle Ford Group into two sedimentological systems: (1) a restricted drowned shelf to the north and (2) an open-marine basinal setting to the south. Pre-OAE-2 Eagle Ford strata on the drowned shelf are cyclic and enriched in molybdenum, suggesting anoxic to euxinic water masses. Anoxic basinward strata are less cyclical and have a lower molybdenum content. The cores were investigated to quantify mineralogical composition and TOC. Machine learning of XRF dataset was conducted using neural-network analysis to predict mineralogies and TOC. Quantitative laboratory-measured XRD mineralogies and TOC were used to conduct the training and develop high-resolution quantitative models. Derived mineralogic and organic matter quantitative models represent continuous relative abundances. This method allows for the utilization of the relatively inexpensive and nondestructive XRF analysis that requires minimal sample preparation to construct high-resolution mineral abundances and TOC content. Hyperspectral imagery was used to generate mineral maps of the L1 core. The used hyperspectral imaging system uses the SWIR (shortwave infrared) and LWIR (longwave infrared) spectrometers. The introduction of the LWIR made it possible to identify minerals that were not detected by previous SWIR systems such as quartz and feldspars. Hyperspectral imaging facilitates the study of textural and fabric relationships. The diagnostic cyclicity of the Lower Eagle Ford is closely related to calcite compositional variations and coccolithophore productivity. Strontium-rich calcite indicates smaller allochem size dominance as well as lower sedimentation rates.

Download or read book Stratigraphy Depositional Environments and Sedimentary Tectonics of the Western Margin Cretaceous Western Interior Seaway written by Dale Nations and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: