Carbonate platform
Carbonate platforms and reefs can attain signifi cant thickness, however, if subsidence continues after volcanic activity ceases or the volcanic front migrates. The areal extent of shallow-marine ...
These carbonate platform systems are excellent depositional archives and are sensitive to climate change (e.g., Nocchi et al., 1988;Jorry, 2004;Scheibner and Speijer, 2008; ...
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 (usually microbes) which induce carbonate precipitation through … See moreUnconfined 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 accommodationThree carbonate production factories defined by W Schlager - Tropical factory (warm. photic zone), Cool Water and Mud Mound factories. ... Abiotic and biotically mediated precipitation is a significant component of the Tropical Factory - ooid shoals form platform-wide subaqueous bars and dunes, and whitings form extensive blankets of lime mud ...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 ...Geologists can now characterize entire carbonate platform systems and their large-scale evolution in time and space, including systems with few outcrop analogues such as the Lower Cre-taceous Central Atlantic 'pre-salt' carbonates. The papers introduced in this review illustrate opportunities,Drowned carbonate platforms on passive margins present a paradox, because their great growth potential exceeds the typical rates of passive margin subsidence and any relative sea-level rise driven ...
Platforms with a medium size (100, 1000 km²) are dominant during Carboniferous. The spatial intersection between geodynamic settings and marine regions favorable to carbonate platform (i.e ...Variations in ichnological features along a proximal‒distal transect within carbonate platforms such as the studied Tirgan ramp, were triggered by changes in different physical, chemical and biological parameters. Variable sedimentary processes, e.g., wave- and tide-dominated hydrodynamic regime and influx of the fresh water from the …١٤ ربيع الأول ١٤٤١ هـ ... further defined four platform-scale carbonate factories that are the “heterozoan-C”, “photo-C”, “photozoan-T” and “biochemical” factories.Carbonate platforms provide valuable geological archives that result from the interplay of carbonate production and accumulation, and are intrinsically related to changes in the environmental and ...Interpretation of two Miocene carbonate platforms in Southeastern part of Central Luconia Province has provided an insight of the structural history of the platforms, relating syn-depositional ...
ABSTRACT The depositional organization and architecture of the middle-late Devonian Yangdi rimmed carbonate platform margin in the Guilin area of South China were related to oblique, extensional faulting in a strike-slip setting. The platform margin shows two main stages of construction in the late Givetian to Frasnian, with a bioconstructed margin evolving into a sand-shoal system.We studied the Otavi Group (), a carbonate platform covering the southern promontory of the Congo Craton in northern Namibia (15,18, 19).In the late Neoproterozoic, the Congo Craton was a Bahama-type sea-level platform that was about the size of the conterminous United States.The carbonate platform occupies the northern and north-western parts of the study area, where the basin floor is relatively deeper in the eastern and south-eastern parts and shallower in the western part. Obviously, a large number of gullies extend in the northwest-southeast direction, formed around the carbonate platform margin and slope area. ...In summary, the carbonate dissolution and overlying collapse structures evolved through three stages: (1) the carbonate was deposited on the platform which then drowned because of rapid relative sea-level rise at the late Early Miocene (Fig. 13 a); (2) main pipe formation stage (Fig. 13 b): thick well-stratified pelagic-hemipelagic sediments ...
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an isolated platform developed on the shoulder of the oblique fault block. The Luconia carbonate platform in the Zengmu Basin began to develop in the Early Miocene. After the Miocene, the carbonate platform in the northern part of the Nankang Platform continued to develop, while most of the carbonate platform in the south was covered by progressiveCarbonate 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). ...We use geodynamic models to understand carbonate pathways upon subduction in the form of large carbonate platforms, which were common in the Tethys realm of Europe. We conducted a series of geodynamic forward models for a 1-km-thick carbonate platform entering subduction. We show that most of the carbonate load detaches from the subducting slab ...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.Comparisons between Central Luconia carbonates and age-equivalent carbonate platforms elsewhere in East Natuna Basin showed that Central Luconia carbonate platforms were drowned earlier (latest late Miocene time) than East Natuna carbonate platforms (Early Pliocene time).Jun 30, 2015 · Carbonate platforms. A number of different morphologies of carbonate platform are recognised, the most widely documented being carbonate ramps, which are gently sloping platforms, and rimmed shelves, which are flat-topped platforms bordered by a rim formed by a reef or carbonate sand shoal. The tectonic setting influences the characteristics of ...
Other isolated carbonate platforms such as the Bahamas, the Maldives, or the platforms off northeastern Australia also record this episode of high Pliocene eustatic sea level (Eberli and Ginsburg ...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.The carbonate platforms developed during rifting and initiated on the fault block of the conjugate rifted margins. Most of the carbonate platforms became drowned after the Middle Miocene. The Malampaya Carbonate Sequences, which have thicknesses of greater than 600 m, developed on a horst of an Oligocene rifted block. ...The impacts of tectonism on carbonate platform. Sea-level fluctuations can influence the type of carbonate platform and characteristics of gravity flow deposits (Read 1985; Reijmer et al. 2012; Phelps et al. 2014). Many studies have been focused on the sea-level changes of the Jixian Period of Mesoproterozoic at the eastern North China plate ...The late Aptian Lower Serdj Formation (LSF) in the Northern Atlas of Tunisia records a mixed carbonate-siliciclastic system from the southern margin of Tethys. Sedimentological investigations of key sections in the Serdj-Bargou area along a NE-SW-platform-to-basin profile reveal five shallow-marine carbonate units (Cu1, Cu2, Cu3, Cu4a and Cu4b), dominated by subtidal deposits, separated by ...Carbonate sedimentation has continued to keep pace with basin subsidence, forming a platform over 5-km thick that is completely isolated from clastic influx. 40 . Epeiric Platform An epeiric platform is a shallow sea dominated by carbonate sedimentation that covers a large portion of a craton.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.Hammad Tariq JANJUHAH, José Antonio GÁMEZ VINTANED, Ahmed Mohamed Ahmed SALIM, Ibrahima FAYE, Mumtaz Muhammad SHAH, Deva Prasad GHOSH, Microfacies and Depositional Environments of Miocene Isolated Carbonate Platforms from Central Luconia, Offshore Sarawak, Malaysia, Acta Geologica Sinica - English Edition, 10.1111/1755-6724.13411, 91, 5 ...The papers presented here provide an integrated view of carbonate platforms, emphasizing dynamic interactions at all hierarchical levels and revealing the limitations of uniformitarian analogy in biotically influenced sedimentary systems.
Carbonates can form in many different types of depositional settings including basin and slope, reefs, and carbonate platforms. Carbonate platforms occur when there is a low input of detritus and clastic supply with shallow marine water. There are many types of carbonate platforms including ramp, rimmed and isolated platforms (Nichols, 2009).
aspect of carbonate platforms is the predomi- nant role of organisms in producing, processing and/or trapping carbonate sediment, even in Precambrian examples. …Acker, J. G. et al., (2002) Satellite remote sensing observations and aerial photography of storm-induced neritic carbonate transport from shallow carbonate platforms. International Journal of Remote Sensing, 23(14), 2853-2868. O’Mara, N.A. & Dunne, J.P. (2019) Hot Spots of Carbon and Alkalinity Cycling in the Coastal Oceans.Platform flooding is the first-order prerequisite controlling platform-top sediment production and subsequent sediment export of tropical carbonate platforms (Schlager et al., 1994; Jorry et al ...The Zhujiang carbonate platform (Liuhua 11-1 field, South China Sea) study shown here provides an example of an integrated approach combining high-resolution geochemistry, microfacies analyses and foraminiferal biostratigraphy in order to improve the reconstruction of environmental conditions prior, during and after platform demise and drowningThe Upper Devonian on the offshore carbonate platform setting consists mainly of massive algal, bioclastic, and oolitic limestone (Rongxian Formation), whereas in the intraplatform basin setting, it is composed of either thin to medium bedded limestone intercalated with cherty bands (Gubi Formation) or siliceous rock (Liujiang Formation) in …Carbonate platforms are mainly distributed in tropical and subtropical low-latitude ocean shallow water areas, and their growth and development are very sensitive to environmental changes, such as water depth, temperature, waves, salinity, dissolved oxygen, sediment and nutrients [1,2,3,4].Changes in any of these controlling factors may …The oolitic shoal reservoirs of the Lower Triassic Feixianguan Formation carbonates in the Sichuan Basin of southwest China are an important target for gas exploration in the basin. Their occurrence, like other cases worldwide, can be divided into two locations in general, i.e., platform interior and platform margin locations. Their differences of reservoir features and origins, however, have ...The isolated carbonate platform is recognized based on diagnostic criteria defined by (Burgess et al. 2013) such as a positive antecedent topography, marked stratal thickening, high angle flanks, stacking patterns, distinct reflection amplitude, and geometry, and onlaps of surrounding sediments. Middle to Late Miocene time has witnessed the ...The Adriatic Carbonate Platform (AdCP) is one of the largest Mesozoic carbonate platforms of the Perimediterranean region. Its deposits comprise a major part of the entire carbonate succession of ...
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Carbonates can form in many different types of depositional settings including basin and slope, reefs, and carbonate platforms. Carbonate platforms occur when there is a low input of detritus and clastic supply with shallow marine water. There are many types of carbonate platforms including ramp, rimmed and isolated platforms (Nichols, 2009). Semantic Scholar extracted view of "Great Basin Paleozoic carbonate platform; facies, facies transitions, depositional models, platform architecture, ...The Maldives archipelago thus is an example of a rather atypical hydrocarbon system which consists of an isolated oceanic carbonate platform overlying a volcanic basement. The results of this study show that circular structures other than karst-related features can be abundant in carbonate platform deposits.The development of carbonate platforms and reefs were controlled by the tectonics and sea level changes in the study area synthetically. During the drifting stage of SCS the Reed Bank area was in a relatively stable condition. An everlasting shallow marine environment and low sediments input favored the formation of carbonate platforms.Spalluto, L (2012) Facies evolution and sequence chronostratigraphy of a 'mid'-Cretaceous shallow-water carbonate succession of the Apulia Carbonate Platform from the northern Murge area (Apulia, southern Italy). Facies 58, 17 - 36.CrossRef Google ScholarCarbonate platform and reservoir strata are very susceptible to dissolution that can create seismic-scale features such as palaeokarst. The seismic expressions of epikarst have been studied for a long time . Recent advances stem from reservoirs associated with major unconformities such as the Middle Ordovician in China and Texas, or the ... Epting, 1980, Epting, 1989 suggests that the overall architecture of the carbonate platforms is determined by four major processes, namely: (i) the rate of skeletal carbonate production, (ii) subsidence, (iii) relative sea-level fluctuation and (iv) the supply of clastic material from the Borneo deltas. Epting, 1980, Epting, 1989 concluded that the termination of the platform was caused by sea ...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 ...We present multi-element data on the super-high-organic-sulfur (SHOS; 5.19 % on average) coals of Late Permian age from Guiding, in Guizhou Province, China. The coals, formed on restricted carbonate platforms, are all highly enriched in S, U, Se, Mo, Re, V, and Cr, and, to a lesser extent, Ni and Cd. Although the Guiding coals were subjected to seawater influence, boron is very low and mainly ...Dissolution of carbonate platforms, like The Bahamas, throughout Quaternary sea-level oscillations have created mature karst landscapes that can include sinkholes and off-shore blue holes. These karst features are flooded by saline oceanic waters and meteoric-influenced groundwaters, which creates unique groundwater environments and ecosystems. Little is known about the modern benthic ... ….
Carbonate platforms are built mainly by corals living in shallow light-saturated tropical waters. The Saya de Malha Bank (Indian Ocean), one of the world's largest carbonate platforms, lies in ...Palynology therefore appears to be a sensitive indicator of short-term (4th-order) sea-level change on carbonate platforms. Dinoflagellate concentrations correlate positively with carbonate compaction, and infer that compacted layers have undergone dissolution of their metastable constituents. Dinoflagellate concentrations therefore can be ...The carbonate platform occupies the northern and north-western parts of the study area, where the basin floor is relatively deeper in the eastern and south-eastern parts and shallower in the western part. Obviously, a large number of gullies extend in the northwest-southeast direction, formed around the carbonate platform margin and slope …Jan 1, 2023 · The slope of middle Miocene carbonate platform provides favourable lithological conditions for the formation of the PFS, and the PFS initiates the gully systems peri-carbonate platforms. The polygonal faults, especially the linear ones in the study area, could have created the original topography for the genesis of gullies. Jan 1, 2023 · The slope of middle Miocene carbonate platform provides favourable lithological conditions for the formation of the PFS, and the PFS initiates the gully systems peri-carbonate platforms. The polygonal faults, especially the linear ones in the study area, could have created the original topography for the genesis of gullies. The carbonate platform was constructed later, dur- ing the second, Late Jurassic period of carbonate deposition, which started with the development of extensive oolitic shoals comprised of radial oolites, algal oncolites, minor quartz sand grains and skeletal debris. The cyclic alter- nation of oolitic grainstones, skeletal and peloid ...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 …Overall, Florida's geological history has been driven by changing sea levels, which have influenced the production of carbonate bedrock, siliciclastic input/transport, hydrology, and surface topography. During the last interglacial period, the majority of south Florida was a shallow carbonate environment with some siliciclastic input. Carbonate platform, [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1]