Carbonate platform

Summary The varied depositional settings in which carbonate accumulate have become better known largely through the exploration for more hydrocarbon reserves and their exploitation in the last 35 years. Though reefs and grainstone shoals have been cited as common hydrocarbon exploration targets and so have been more intensively examined, other carbonate facies from both basin and/or platform ...

A comprehensive study on the accretion and diagenesis of the Permian-Triassic boundary microbialites is conducive to a better understanding of the ecological community after the end-Permian mass extinction. Here we studied the special microbialite sequences at the Tianba section of Leye isolated carbonate platform, South China Block. The microbialites are shown as small columnar ...Feb 22, 2023 · Calcium carbonate formation is the primary pathway by which carbon is returned from the ocean–atmosphere system to the solid Earth1,2. ... (platform, ramp and reef) carbonate burial sink and an ... Carbonate Platform; Carbonate Ramp; Shelf Carbonate; These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves. Download chapter PDF Basics: Classification of carbonate environments and obligatory reading. ...The geometry of carbonate platforms reflects the interaction of several factors. However, the impact of carbonate producing organisms has been poorly investigated so far. This study applies ...Backstepping of carbonate platform margins is an important process for understanding how carbonate platform responds to paleoenvironment changes. The products of backstepping, such as backstepped margin, backstepping surface and backstepping succession have been widely documented on both modern and ancient platforms around the world.The seismic patterns associated with the lacustrine carbonates of the Barra Velha Fm. are: (1) carbonate platforms on structural highs with parallel to sub-parallel reflectors; (2) carbonate build ...Here we present geochemical, stratigraphic and palaeolatitudinal data from the carbonate platforms drilled during ODP Legs 143 and 144. Based on the stable-isotope geochemistry of calcite cements ...Introduction. Drowned carbonate platforms have been described in different geological environments, being found for example in Upper Carboniferous-Lower Pseudoschwagerina Limestone of Carnic Alps (Austria) (Samankassou, 1999), in Lower Jurassic of the Apennines and Sicily (Italy) (Marino and Santantonio, 2010; Sulli and Interbartolo, 2016), in Lower Jurassic of the Jbel Bou Dahar (Central and ...

Jun 19, 2019 · Platform carbonates are a major component of the Earth system, but their spatial distribution through geological times is difficult to reconstruct, due to the incompleteness of geological records, sampling heterogeneity, and their intrinsic complexity. mixotrophs) that need good light conditions and live in Classification of carbonate platforms is not just a shallow-water environments (the euphotic zone). This ...Jan 1, 2005 · The Segitiga Platform (1400 km 2) contains Terumbu Formation carbonate strata as much as 1800 m thick that were deposited in platform interior, reef and shoal margin, and slope to basin environments. Mar 1, 2023 · Whereas concept of physical accommodation prevails in carbonate ramp platforms dominated by hydrodynamic processes (wave, current) and without any reef structure, in rimmed carbonate platforms with reefal structure the concept of ecological accommodation take a lead where adherence of organism with one another with growth of reef can happen ... Many biotic carbonate platforms of the northern hemisphere western Tethys drowned or shifted to non-skeletal platforms during the early Toarcian. However, southern hemisphere records of Toarcian carbonate platforms are rare, and thus the extent and significance of biotic platform demise during the T-OAE is unclear.

Carbonate rock aquifers in Paleozoic rocks are flatlying to gently folded in places. Folded and faulted carbonate-rock aquifers are in the Appalachian and Rocky Mountain chains. The carbonate-rock aquifers that underlie Florida and adjacent states are called platform carbonates, and have intergranular porosity as well as large solution openings.Jul 13, 2022 · The Anguilla Bank is the largest carbonate platform (area of about 4,660 km 2, Table 1). The data reveals that the carbonate platform is not protected by shelf-edge barriers along most of its rim. Indeed, bathymetric highs are only visible east of Saint-Barthélémy and scarcely visible on the northeastern edge of the bank . However, the lack ... ˜e OST carbonate platform found in each continent’s marginal environment is a key archive of a paleo-depositional system with a record of geological changes (Fig. 1a). e characteristics of each ...Apr 10, 2023 · The Middle Member of the Llopis Fm in the Sierra de Bedmar-Jódar Unit of the Prebetic Zone of Jaén (southern Spain) was deposited on a shallow-marine platform of the Southern Iberian Continental Margin during the earliest Aptian. Detailed field logging of nine stratigraphic sections and facies mapping have allowed seven lithofacies associations (L1–L6) to be distinguished, one ...

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Based on high-resolution seismic and well datasets, this paper examines the evolution and drowning history of a Paleocene-Eocene carbonate platform in the Offshore Indus Basin of Pakistan. This study uses the internal seismic architecture, well log data as well as the microfauna to reconstruct factors that governed the carbonate platform growth and demise. Carbonates dominated by larger ...During the Early-Middle Ordovician, the Upper Yangtze Platform experienced extensive development of a distinctive set of mixed siliciclastic-carbonate deposits known as the Meitan Formation. To conduct a comprehensive study of the relationship between mixed sedimentation and sea-level changes, the Hailong section, situated at the southwest margin of the Upper Yangtze Platform in SW China, was ...Origin of carbonate sediments.The reef: a unique depositional environment.Unique biological control over the texture and fabric of carbonate sediments.Carbonate grain composition.Carbonate rock classification.Efficiency of the carbonate factory and its impact on patterns of carbonate sedimentation.Carbonate platform types and facies models.Summary.Carbonate platforms usually keep pace with subsidence and sea level rise but “platform drowning” occurs when carbonate sedimentation slows or when siliciclastics replace carbonates. Identifying specific mechanism(s) behind platform drowning is critical for understanding global environmental changes such as Ocean Anoxic Events (OAEs). ...

Jul 3, 2021 · Even if nutrients may have adversely affected oligotrophic skeletal carbonate production on carbonate platforms, microbial or nonskeletal carbonates may have become more abundant (Smith et al ... The Tarim Basin, in northwestern China, is a large (56 × 104 km 2), multicycle basin that developed in the Tarim Plate in the Early Paleozoic (Fig. 1).After the formation of a Cambrian–Ordovician carbonate platform, the Tarim Basin evolved from early continental rifting and extension to a foreland basin next to an intracratonic depression.The carbonate platform mostly developed along the crest of the half-horst and drowned toward the Borneo Trough into deep-sea sediment again (Figure 2-27) Jamaludin et al., 2017). The orientation ...carbonate platforms than about most other sedi- mentary systems. Evolution has altered both the constructive and destructive effects of platform- dwelling organisms on carbonate fabrics, with ...Carbonate platforms developed in the southwestern Provence area during the late Cretaceous on the rims of a narrow deep E-W oriented basin. The upper Cenomanian lower Member Fontblanche 1 of the Fontblanche Limestones Formation is exceptionally rich in rudists. This member is well exposed in two quarries with flat outcrop surfaces, thanks to ...how carbonate platform development on millennial time scales and kilometric length scales was forced by long term eustatic, oceanographic, or tectonic factors, yet this forcing can now beThe Caribbean is a region of active frontier and emerging basins where relatively few ancient carbonate platforms have published 3D seismic data (e.g. Bunge et al. 2017), and it was also a region characterized by localized but frequent tectonic and volcanic activity that can provide alternatives to carbonate platform interpretations. After the end-Cretaceous mass extinction, carbonate platforms continued to form on the shores of Tethys. During the Palaeogene, the Earth went through a marked phase of global warming. Between about 60–55 Ma, three stages of carbonate platform development can be identified Tethys-wide (Scheibner and Speijer, 2007). During the first stage ...Distribution of facies on carbonate platforms; rimmed vs. unrimmed platforms; cross-bedded shoal facies; autocyclic and allocyclic models for genesis of mete...

The platform carbonate succession includes a Pliensbachian in age, well-layered, lagoonal carbonate unit including both mud-and grain-supported limestone beds, and a Toarcian in age oolithic ...

Previous studies of the Xisha carbonate platforms have been limited to analysis of shallow boreholes and examination of modern carbonate deposits on the islands (He et al., 1986, Zhao et al., 2011).However, in the course of rapidly advancing deep-water hydrocarbon exploration, both commercial and academic seismic surveys have been conducted in deep-water settings of the northern South China Sea.The major and trace elements in carbonates from the Kioto Carbonate Platform in Tibet provide unique insights on palaeoceanographic changes in shallow tropical waters during the late Pliensbachian-early Toarcian interval and help elucidate potential triggers for the crisis in the carbonate factory. The synchronous rise in most water-insoluble ...Carbonate platforms of extensional margins may be grouped into several major categories. Homoclinal ramps have gentle slopes into deep water, may have skeletal or ooid/pellet sand shoal complexes, that grade without break in slope into deep-ramp nodular limestone, and then into pelagic/hemipelagic basin facies they generally lack significant slump and sediment gravity flow deposits in the ...The carbonate platform upon the western margin of the Xisha Islands, rooted upon topographic highs, became partly submerged. The carbonate platform aggraded and backstepped in response to an overall transgression driven mainly by tectonic subsidence. During this period, small sags formed and ceased movement before carbonate production.The carbonate platform pre-dated the deposition of evaporites, such as microbial reefs, played a favorable impact for evaporite precipitation. It controls the connection between saline and open sea in terms of the global sea-level fluctuations. The Tarim Basin is one of the important intracratonic basins which have the tremendous oil and gas ...Along Maldives carbonate platform, Betzler et al. (2009) proposed that late Miocene-Early Pliocene partial drowning of the platform is linked to onset and intensification of the Monsoon trough injection of nutrient into shallow-water. Coeval drowning episodes in the Indo-Pacific realm suggest that environmental conditions deterioration linked ...Karstification in carbonate platforms of the Miocene age in Central Luconia province, offshore Sarawak, Malaysia, has been discussed since the onset of exploration and initial discoveries in the ...The state of the art on the glycerol carbonate (GC) synthesis has been updated since the last published reviews in 2012, 2013, and 2016. Three types of reactions continue to be studied: glycerolysis of urea, transcarbonation of DMC, DEC, or cyclic carbonates with glycerol and reaction using CO 2.Among these different routes, DMC and glycerol were selected as the raw materials for the GC ...The Natih Formation (late Albian-early Turonian, Oman) corresponds to a very broad inner carbonate platform extending over more than 800 km between the Arabian Shield to the south and the Tethys ...The Shuntuoguole Low Uplift is located in the slope-shelf facies area and developed slope facies source rocks. A carbonate platform was widely developed in Tazhong area during Early-Middle Ordovician. During the Late Ordovician, the platform basins in Tazhong area were differentiated, and the Katake Uplift continued to elevate.

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Carbonate Platforms: Facies, Sequences and Evolution Editor (s): Maurice E. Tucker, James Lee Wilson, Paul D. Crevello, J. Rick Sarg, J. Fred Read First published: 22 December 1986 Print ISBN: 9780632027583 | Online ISBN: 9781444303834 | DOI: 10.1002/9781444303834 Copyright © 1990 The International Association of Sedimentologists Navigation BarCarbonate platforms show high-amplitude continuous reflection at the top and high reflection alternative with weak reflection. The above analysis provided information about the influence of ...2 days ago · Quick Reference. A structure that forms in shallow water where there is extensive deposition of carbonate that is not mixed with siliclastic sediments. Carbonate platforms covered large areas at times when large areas of the continents lay beneath shallow seas. Today they are much narrower. ABSTRACT Many types of carbonate platforms have been described, from homoclinal ramps to rimmed shelves and a full spectrum of variations in between; the distinction between these different types can be problematic. Nevertheless, classification of carbonate platforms is not just a semantic or academic issue. For example, it is clearly important for the accurate interpretation of seismic images ...Moreover, a rimmed carbonate platform with a barrier reef and a steep slope surrounding the Intisar embayment was interpreted (Gumati 1992; Spring and Hansen 1998), a frame reef sensu Riding with significant topographic relief. Recent scleractinian corals form wave-resistant barrier reefs in the euphotic zone (e.g.Unconfined carbonate platform sheet geometries formed with ecological accommodation form; Flat-topped open shelves with moderate shallow-water ecological accommodation; Reef-rimmed platform with highest shallow-water ecological accommodation; Massive steep to cliffed margins with maximum shallow-water ecological accommodationApr 1, 2014 · B. Retrogradation of carbonate platforms during earliest middle Miocene on the western Xisha carbonate platform. Carbonate production failed to keep pace with acceleration in the rate of relative sea-level rise in slope environments. Carbonate platforms retreated toward topography highs and the area of carbonate platform growth shrank. C. Carbonate platforms are widely used for the reconstruction of changes in paleoclimate and paleoceanography (e.g. Eberli and Ginsburg, 1989; Isern et al., 2004; Betzler et al., 2009), and their deposits are of great interest to hydrocarbon exploration (e.g. Burchette, 2012). Drowning of carbonate platforms is defined as "an event where ...Carbon atoms are the building blocks for carbon, which is the sixth most abundant element found in the universe. A carbon atom has six electrons, four of which are in the outer shell of the atom, its valence shell.lowstands, platforms were exposed, and siliciclastic material was conveyed directly into the basin. During sea-level highstands, sediment input to the basin comprised platform-derived carbonate and aeolian silt and clay. A siliciclastic series includes the lower Wolfcamp interval.Carbonate platforms of extensional margins may be grouped into several major categories. Homoclinal ramps have gentle slopes into deep water, may have skeletal or ooid/pellet sand shoal complexes ...carbonate platforms to be induced by several concomitant environ-mental, biological, geological, oceanographic and eustatic factors. While"platformdrowning"isgenerallydefinedasanevent(Schlager, 1981), geologists studying ancient platforms must at first tackle platform drowning as a final physical product (e.g. a facies change), ….

region was a shallow-water carbonate platform (Fig. 2). At the beginning of the Bimammatum Ammonite Zone, an import-ant lithological change is observed from the siliciclastic-dominated ‘Röschenz Member’ to the carbonate-dominated ‘Hauptmumienbank Member’ (Gygi & Persoz, 1986; Gygi et al., 1998). The Röschenz Member is composed …Precambrian carbonate platforms have been widely described on several continents and are commonly used for reconstructing of paleoenvironments in Central Africa (Delpomdor et al., 2013; Préat et al., 2018).In Central African Republic (CAR), one of the most intriguing carbonate deposits is the Ombella-M'poko Formation (O.-M. Fm), which was deposited in a tectonically structured graben subbasin ...Carbonate platform architecture through Oligo-Miocene is the most important goal of this study; which was achieved by a combination of biostratigraphy, cyclostratigraphy, and facies analysis. Biostratigraphy of carbonate successions is based on spatial and temporal distribution of key large benthic foraminifera; which assigned carbonate ...A carbonate platform is a sedimentary body which possesses topographic relief, and is composed of autochthonic calcareous deposits. Platform growth is mediated by sessile organisms whose skeletons build up the reef or by organisms which induce carbonate precipitation through their metabolism.It is pointed out that the carbonate platform in the Xisha sea area adjacent to the Huaguang Sag in the Qiongdongnan Basin and the northern Zhongjiannan Basin is a potential area for oil and gas ...Carbonate platforms of extensional margins may be grouped into several major categories. Homoclinal ramps have gentle slopes into deep water, may have skeletal or ooid/pellet sand shoal complexes ...In contrast, Proterozoic and Phanerozoic carbonate platforms are typically 100s of meters thick and many kilometers in extent. The oldest limestone-dolostone sequences with these dimensions are ~ 2.78-2.94 Ga in age. One of the thickest and best-preserved of these is the ~ 2.8 Ga old limestone at Steep Rock Lake in Northwestern Ontario.Energy has fueled industrialization and helped lift billions of people out of poverty. However, electricity and heat generation now contribute to significant global CO 2 emissions. We're working to decarbonize power without deindustrializing society. Our platforms can shift the energy mix away from fossil fuels and unlock the potential of clean ... Carbonate platform, During the E-C transition, the Yangtze Block evolved from a rift basin to a passive continental margin basin (Wang and Li, 2003), most of which accommodated the carbonate platform, surrounded by narrow marginal transitional zones to the north (~ 800 km long) and south-to-southwest (> 1600 km long), along which shallow-water carbonates sharply change facies basinwards into black chert-shale ..., The platform carbonate succession includes a Pliensbachian in age, well-layered, lagoonal carbonate unit including both mud-and grain-supported limestone beds, and a Toarcian in age oolithic ..., We identify the seismic characteristics about the carbonate platform and other types of reefs in the Reed Bank area, South China Sea, based on a more than 220 km long multi-channel seismic ..., Carbonate platform was divided into five general genetic types, namely, the ramp, rimmed shelf, epeiric platform, isolated platform, and drowned platform [7]. A handful of research work on Tarim Basin's Cambrian lithofacies paleogeography was accomplished. While there were already few wells drilled in the Cambrian, fewer wells …, Ginsburg, R. N. inSubsurface Geology of a Prograding Carbonate Platform Margin, Great Bahama Bank: Results of the Bahamas Drilling Project Vol. 70, ed. Ginsburg R. N. 61-100SEPM Special ..., The Valdediezma platform consists of upper Tournaisian to lower Bashkirian (Carboniferous) shallow-water carbonates deposited in the core of the Picos de Europa Province (Cantabrian Mountains, northwest Spain). Although faulted in several thrust sheets, it is the only preserved platform developed in the Mississippian starved basins of the southern branch of the Variscan Orogen that is ..., We have analyzed two recently acquired multi-channel seismic profiles across the Reed Bank area, South China Sea. A detailed seismic interpretation coupled with drilling data has proved the occurrence of a wide carbonate platform, developed between the Late Oligocene and the Early Miocene (32-20 Ma). The top of these carbonates is an important regional unconformity, corresponding to a strong ..., A Barremian to Albian succession on Mount Kanala, part of a Tethyan isolated carbonate platform, was investigated for its δ13C variations. The limestone sequence is composed of a series of peritidal shallowing-upward cycles with clear petrographic evidence for strong early diagenetic overprinting related to repeated subaerial exposure., Carbonate platforms are among the most important archives of Earth's biological and chemical histories and hold approximately half of the world's conventional petroleum reservoirs. Understanding the biologic, chemical and physical controls on carbonate platform architecture and facies distribution is therefore critical to interpreting the ..., The rate of carbon in the atmosphere has increased dramatically since the beginning of the industrial revolution. The problem with this is that the effects of this increase pose risks to life on the planet., lowstands, platforms were exposed, and siliciclastic material was conveyed directly into the basin. During sea-level highstands, sediment input to the basin comprised platform-derived carbonate and aeolian silt and clay. A siliciclastic series includes the lower Wolfcamp interval., The state of the art on the glycerol carbonate (GC) synthesis has been updated since the last published reviews in 2012, 2013, and 2016. Three types of reactions continue to be studied: glycerolysis of urea, transcarbonation of DMC, DEC, or cyclic carbonates with glycerol and reaction using CO 2.Among these different routes, DMC and glycerol were selected as the raw materials for the GC ..., Furthermore, the restricted platform is located at the landward region of carbonate bank (Fig. 2). Here, seawater is restricted, thus causing a reducing and quiet environment, and contacts with ... , The large magnitude of the PETM excursion in carbonate platform environments is likely a consequence of local effects that were amplified by relative sea-level change and increased platform ..., Their purely skeletal origin indicates reworking from platform edge areas (Playton et al., 2010). Interbedding of grain-dominated carbonate material and muddier packstone to floatstone deposits ..., Jun 14, 2021 · Carbonate platforms usually keep pace with subsidence and sea level rise but “platform drowning” o... A Redox‐Based Model for Carbonate Platform Drowning and Ocean Anoxic Events - Smith - 2021 - Geophysical Research Letters - Wiley Online Library , The Triassic/Jurassic boundary section cropping out at Mt Sparagio in north-western Sicily (Italy) consists of a thick and continuous peritidal succession typical of a Tethyan carbonate platform. The combined chemostratigraphic and biostratigraphic study of this section allowed us to parallel the environmental variations inferred by the isotopic records and the extinction trends recorded by ..., ١٤ محرم ١٤٤٥ هـ ... Growth and demise of a Paleocene isolated carbonate platform, northwest Sirte Basin, Libya – Sequence stratigraphic architecture and controlling ..., The carbonate platforms from the Yadana area are thus a representative example of the interplay between global mechanisms and local paleoenvironmental parameters on carbonate platform initiation ..., In order to diagnose emplacement of discordant breccia body in carbonate platform, we here describe sedimentary structures and texture as well as bed geometry of two beds of the Chaomidian ..., Isolated carbonate platforms started to develop in areas recording changes in topography during the early Quaternary (Mory, 1991; Saqab and Bourget, 2015a). Some of these platforms were controlled by structural highs (horsts) in a highly faulted region (Burgess et al., 2013). However, the ICPs in the study area have a much more complex …, lowstands, platforms were exposed, and siliciclastic material was conveyed directly into the basin. During sea-level highstands, sediment input to the basin comprised platform-derived carbonate and aeolian silt and clay. A siliciclastic series includes the lower Wolfcamp interval., The most distinguishable stratigraphic sequence is the Nido carbonate sequence (Steuer et al. 2013) (Fig. 2), which is composed of the carbonate platforms in shallow marine environment. This Nido carbonate sequence is cover on top by limestones, wackestones, and packstones, deposited in an open marine of shallow shelf to bathyal …, Published: Oct. 23, 2023 at 10:05 a.m. ET. By Chris Wack. Li-Cycle Holdings shares were down 46% at $1.23 after the company paused construction work on its Rochester Hub project in New York ..., A carbonate platform lies at depths between 60 and 90 m on the outer continental shelf off western India (figure 1).It is located off the Narmada and Tapi rivers that debouch abundant water and terrigenous sediments (Rao 1975).This platform is separated from the mainland by a huge clastic depocenter – the Dahanu depression, in which, pro …, Carbonate platform morphology is a first order control on the magnitude and orientations of stresses in the subsurface. Scallops and promontories present on carbonate margins preferentially concentrate stresses, highlighting potential fracture sweet spots., Shallow-water carbonate platforms with high sedimentation rates and abundant biota are crucial to understanding the environmental and ecological changes associated with the PETM. Carbonate platforms grown all along the borders of the Tethys Ocean, which was an extensive east–west subtropical seaway during the Paleogene, offer a wide variety ..., The carbonate platform sediments and the atolls of the Frasnian are time equivalent (Fig. 2, Fig. 6). We have seen that mean MS evolution with facies is the opposite between the carbonate platform and the time-equivalent carbonate mound. We propose a comparison of the Tailfer ..., Biogeochemical processes that dominate carbonate platforms and anoxic marine basins are at the heart of this research. Thus, I am also interested in exploring the underlying biogeochemical ..., The generalized carbonate platform model displays the relative position of major carbonate depositional environments. It is important to understand that ..., Feb 14, 2022 · The carbonate platform maps from Kiessling et al. were georeferenced and reprojected into geographic coordinates, and using GPlates, the geometries were forward-rotated into present-day geometries – allowing the platforms to be connected to any plate tectonic reconstruction (Figure 2) (Supporting Information 1.3). Given that carbonate ... , Carbonate platform stratigraphy is driven by the interaction between physical changes during basin formation and ecological evolution of biota. Ecological accommodation depends on a range of ..., The repeated changes in carbonate platform geometry from ramp to rimmed platform documented by Barremian to Cenomanian strata of the Arabian margin have been ascribed to changing rates of carbonate production and accommodation ultimately controlled by short-term sea-level rise (van Buchem et al., 2002; Droste et al., 2010; Razin et al., 2010 ...