Numerical Outcrop Geology Applied to Stratigraphical Modeling of Ancient Carbonate Platforms: The Lower Cretaceous Vercors Carbonate Platform (SE France)

2011 ◽  
pp. 195-209
Author(s):  
RÉMY RICHET ◽  
JEAN BORGOMANO ◽  
ERWIN W. ADAMS ◽  
JEAN-PIERRE MASSE ◽  
SOPHIE VISEUR
Keyword(s):  
Lower Cretaceous ◽  
Carbonate Platform ◽  
Carbonate Platforms ◽  
Se France

Mesozoic palaeogeography and tectono-stratigraphic features of the northern Amerini Mts. (Central Apennines, Italy): new constraints on their Jurassic and Cretaceous evolution

2020 ◽  
Author(s):  
Costantino Zuccari ◽  
Angelo Cipriani ◽  
Massimo Santantonio
Keyword(s):  
Early Cretaceous ◽  
Lower Cretaceous ◽  
Carbonate Platform ◽  
Indirect Evidence ◽  
Lower Jurassic ◽  
Geological Mapping ◽  
Carbonate Platforms ◽  
Central Apennines ◽  
Sedimentary Evolution ◽  
Structural High

<p>A geological mapping project was performed on the 1:10,000 scale in the northern Amerini Mts. (Narni–Amelia Ridge, Central Apennines), coupled with facies analysis and multidisciplinary outcrop characterisation. This project was focused on the Jurassic-Lower Cretaceous succession, in order to reconstruct the Mesozoic palaeogeography and tectono-sedimentary evolution of the study area. This sector of the Apenninic Chain (i.e. Umbria-Marche-Sabina palaeogeographic domain) experienced the Early Jurassic rifting phase, which dismembered the vast Calcare Massiccio carbonate platform. The development of a rugged submarine topography, coupled with drowning of the benthic factories, were the main effects of this normal faulting. The complex submarine physiography, made of structural highs and lows, is highlighted by facies and thickness variations of the Jurassic and Lower Cretaceous deposits. The hangingwall blocks hosted thick (hundreds of metres) pelagic successions, with variable volumes of admixed gravity-flow deposits. These successions onlapped the horst blocks along escarpments, rooted in the rift faults, where the pre-rift Calcare Massiccio was exposed. The tops of footwall blocks (Pelagic Carbonate Platforms or PCPs) were capped by thin (few tens of metres or less), fossil-rich and chert-free, condensed pelagic successions. This rift architecture was evened out at a domain scale in the Early Cretaceous. Successively, Miocene orogenic and Plio-Pleistocene extensional faulting caused uplift and exhumation of the Mesozoic rocks.</p><p>In the study area, geothematic mapping associated with the analysis of basin-margin unconformities and successions revealed a narrow and elongated Jurassic structural high (Mt. Croce di Serra - Mt. Alsicci structural high), surrounded by Jurassic basinal pelagites. The PCP-top condensed succession is not preserved. The chert-rich basinal units rest on the horst-block Calcare Massiccio through unconformity surfaces (palaeoescarpments), as marked by the silicification of the (otherwise chert-free) shallow-water limestone. The onlap successions embed megablocks of Calcare Massiccio (hundreds of metres across), detached from their parent palaeoescarpments. Very thin, condensed deposits form discontinuous veneers on the olistoliths of Calcare Massiccio (epi-olistolith deposits) and are onlapped by younger basin-fill pelagites. The beds surrounding the olistoliths are characteristically bent due to differential compaction, as their (newly acquired) strikes mimic the outline of the stiff objects they were burying.</p><p>Indirect evidence for a Toarcian, post-rift, tectonic pulse can be locally mapped, and is documented by angular unconformities between the Pliensbachian and Toarcian pelagites, as well as by mass-transport deposits found in the Rosso Ammonitico (Toarcian).</p><p>The same goes for millimetric to centimetric neptunian dykes made of Maiolica pelagites cross-cutting the Corniola Fm. (Sinemurian-Pliensbachian). These dykes, coupled with the occurrence of unconformities between Aptian-Albian pelagites (Marne a Fucoidi Fm.) and Lower Jurassic rocks (Calcare Massiccio and Corniola formations), provide evidence for a further Early Cretaceous tectonic phase, recently reported from the southern sectors of Narni-Amelia ridge.</p>

New insights into the depositional environment and stratigraphic position of the Gugu Breccia (Pădurea Craiului Mountains, Romania)

2021 ◽  
Vol 21 (11) ◽  
pp. 215-233
Author(s):  
Traian Suciu ◽  
George Pleş ◽  
Tudor Tămaş ◽  
Ioan I. Bucur ◽  
Emanoil Săsăran ◽  
...  
Keyword(s):  
Lower Cretaceous ◽  
Depositional Environment ◽  
Carbonate Platform ◽  
Type Locality ◽  
Carbonate Platforms ◽  
Terrigenous Input ◽  
New Information ◽  
The Matrix ◽  
Stratigraphic Position ◽  
Sedimentary Formation

The study of the carbonate clasts and matrix of a problematic sedimentary formation (the Gugu Breccia) from the Pădurea Craiului Mountains reveals new information concerning its depositional environment and stratigraphic position. The identified microfacies and micropaleontological assemblages demonstrate that all the sampled limestone clasts from the Gugu Breccia represent remnants of a fragmented Urgonian-type carbonate platform. The Barremian age of the clasts suggests that the stratigraphic position of the Gugu Breccia at its type locality could be uppermost Barremian-lowermost Aptian, a fact demonstrated also by the absence of elements from Lower Cretaceous carbonate platforms higher in the stratigraphic column (e.g., Aptian or Albian) of the Bihor Unit. The sedimentological observations together with the matrix mineralogy bring new arguments for the recognition of terrigenous input during the formation of the Gugu Breccia.

Seismic Facies, Stratigraphy, Geomorphology, and Seismic Modelling of a Lower Cretaceous Carbonate Platform

2020 ◽  
pp. SP509-2020-18
Author(s):  
Jean-Christophe Embry ◽  
David Hunt ◽  
Arnout Colpaert ◽  
Anders Dræge ◽  
Laura Zahm
Keyword(s):  
Lower Cretaceous ◽  
Spatial Organization ◽  
Carbonate Platform ◽  
Rock Physics ◽  
Seismic Facies ◽  
Carbonate Platforms ◽  
Seismic Modelling ◽  
Seismic Sequences ◽  
Seismic Geomorphology ◽  
Platform Margin

AbstractGlobally, Lower Cretaceous carbonate platforms form important hydrocarbon reservoirs. An exceptional seismic dataset allowed us to examine controls on the stratigraphy, seismic geomorphology, facies architecture, and along-strike variability of a Lower Cretaceous platform. Within the platform succession, a partitioning of facies is developed between Transgressive, Highstand and Forced Regressive seismic sequences. Spectacular seismic geomorphologic images of the platform using spectral decomposition techniques reveal spatial organization within both depositional and diagenetic (i.e. paleokarst) patterns. The study was undertaken in order to optimise a well location. Pre-drill seismic facies interpretations were interpreted with the aid of offset well data and drill cores. Core data encompass a range of slope, platform margin and platform interior facies with inferred paleoenvironments that are matched to the seismic geomorphology of the platform. 2D Seismic forward modelling was integrated in our workflow to investigate the extent of potential sealing lithologies and the reservoir potential of the individual seismic sequences. Nearby wells were used to calibrate a modified rock physics model for the different lithofacies. Multiple seismic model realisations were generated to assess reservoir quality in alternative well locations and the continuity and quality of sealing strata. Results of the pre-drill forward-modelled poro-perm prediction are presented, showing a good fit with the final well observations after drilling.

scholarly journals Lower Cretaceous carbonate gravity-flow deposits from the Bohinj area (NW Slovenia): evidence of a lost carbonate platform in the Internal Dinarides

2012 ◽  
Vol 183 (4) ◽  
pp. 383-392 ◽  
Author(s):  
Duje Kukoč ◽  
Špela Goričan ◽  
Adrijan Košir
Keyword(s):  
Early Cretaceous ◽  
Continental Margin ◽  
Lower Cretaceous ◽  
Carbonate Platform ◽  
Gravity Flow ◽  
Carbonate Platforms ◽  
Shallow Marine ◽  
Marine Benthos ◽  
Plassen Carbonate Platform ◽  
Internal Dinarides

Abstract In the Bohinj area (NW Slovenia), a distinctive interval of carbonate gravity-flow deposits overlying the pelagic Biancone limestone was analyzed for microfacies and dated with radiolarians. This interval, newly described as the Bohinj Formation, consists of a 3 m thick carbonate breccia capped by a 4 m thick massive calcarenite. The breccia is composed of clasts of carbonate platform facies, isolated ooids and oncoids, and bioclasts of shallow-marine benthos. Intraclasts of pelagic calpionellid wackestone and rare chert clasts are also present. Radiolarians from the pelagic limestone below indicate a latest Tithonian to earliest Berriasian age, and those above indicate a Berriasian to Early Valanginian age. Paleogeographically, the area was part of the Bled basin, which had a relatively distal position on the Adriatic continental margin. This position is suggested by flysch-type deposits in the area that are Early Cretaceous in age and thus correlate with the Bosnian Flysch in the central Dinarides. The Bohinj Formation provides evidence of a carbonate platform that must have been located more internally but is now not preserved. This inferred platform (named the Bohinj Carbonate Platform) may have developed on top of a nappe stack, which formed during the early emplacement of the internal Dinaric units onto the continental margin. The platform correlates regionally with genetically similar isolated carbonate platforms of the Alpine – Dinaride – Carpathian orogenic system, e.g., with the Plassen Carbonate Platform in the Northern Calcareous Alps and the Kurbnesh Carbonate Platform in Albania.

About this title - Seismic Characterization of Carbonate Platforms and Reservoirs

10.1144/sp509 ◽  
2021 ◽  
Vol 509 (1) ◽  
pp. NP-NP
Author(s):  
J. Hendry ◽  
P. Burgess ◽  
D. Hunt ◽  
X. Janson ◽  
V. Zampetti
Keyword(s):  
Seismic Data ◽  
Oil And Gas ◽  
Carbonate Platform ◽  
Carbonate Platforms ◽  
Oil And Gas Exploration ◽  
Seismic Modelling ◽  
Flow Units ◽  
Development Data ◽  
Seismic Characterization

Modern seismic data have become an essential toolkit for studying carbonate platforms and reservoirs in impressive detail. Whilst driven primarily by oil and gas exploration and development, data sharing and collaboration are delivering fundamental geological knowledge on carbonate systems, revealing platform geomorphologies and how their evolution on millennial time scales, as well as kilometric length scales, was forced by long-term eustatic, oceanographic or tectonic factors. Quantitative interrogation of modern seismic attributes in carbonate reservoirs permits flow units and barriers arising from depositional and diagenetic processes to be imaged and extrapolated between wells.This volume reviews the variety of carbonate platform and reservoir characteristics that can be interpreted from modern seismic data, illustrating the benefits of creative interaction between geophysical and carbonate geological experts at all stages of a seismic campaign. Papers cover carbonate exploration, including the uniquely challenging South Atlantic pre-salt reservoirs, seismic modelling of carbonates, and seismic indicators of fluid flow and diagenesis.

New insights on the age of the post-Urgonian marly cover of the Apt region (Vaucluse, SE France) and its implications on the demise of the North Provence carbonate platform

2017 ◽  
Vol 359 ◽  
pp. 44-61 ◽  
Author(s):  
Camille Frau ◽  
Antoine Pictet ◽  
Jorge E. Spangenberg ◽  
Jean-Pierre Masse ◽  
Anthony J.-B. Tendil ◽  
...  
Keyword(s):  
Carbonate Platform ◽  
The North ◽  
Se France
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