Carbonate platform. In the Mt. Olympos region of northeastern Greece, ...

Miocene carbonate platforms are located on intrabas

The Central Luconia province in the South China Sea, offshore Sarawak, features extensive development of Middle to Late Miocene isolated carbonate platforms. This study presents a regional seismic architecture - seismic facies review of platform flank geometries and off-platform depositional styles, with the goals of understanding their ...The generalized carbonate platform model displays the relative position of major carbonate depositional environments. It is important to understand that ...Ramp geometry and seismic character Carbonate depositional systems exhibit widely variable slope shapes, ranging from near vertical escarpments several kilometres high to epeiric platforms with little relief, and show correspond- ingly variable responses to relative sea-level changes (Kenter and Schlager, 1989).Platform morphologies and slope profiles are also factory specific: T-factories show a rimmed flat-topped platform with adjacent exponential slopes or a carbonate ramp morphology; CWC-factories display mound morphologies with steep slopes; C-factories are associated with open shelf systems and Gaussian shaped slope profiles; while M-factories ...The shallow submerged platform area of the Bahamas extends more than 400 km (248 mi) north-south and covers an area of about 125,000 km 2 (48,263 mi 2). ... Carbonate environments have changed substantially over geological time by comparison to siliciclastic environments; for example, the type of organism responsible for building reefs has ...Sediment type within carbonate turbidites is variable and controlled by source. Turbidites are among the few carbonates that have been transported significant distances. Close to the basin-platform margin carbonate turbidite deposits form irregular ribbons of channel-fill that are perpendicular to depositional strike. Sep 1, 2020 · Such fractures are generally oriented parallel to the carbonate platform margin (Kosa & Hunt, 2005; Hunt et al., 2002; Narr, 2008). A second driver is differential compaction over pre-existing (antecedent) topography. Deformation can result from the flexure of early cemented carbonate strata over an ancient topographic high sitting below the ... Jun 12, 2020 · Carbonate Platforms. Examples of hidden mechanisms that modulate CO 2 outgassing are carbonate platforms, seen in the video above. These carbonate reservoirs—formed through eons of carbonate ... Carbonate platform distribution come from bibliographic data (see text for details). The 4 factories are defined after Michel et al. 22,28, by splitting the Schlager 9,16,17 T-factory into ...Fig(2) 2-2 carbonates platform Carbonate platform is a general term widely used for mostly shallow-marine carbonate that develops along passive continental margins. Five major types of carbonate platforms having particular pattern of facies and facies succession are recognized FIG (3):- (Ginsburg and James 1974) 1. Ramp.Five main tectonic phases previously proposed were recognized: (1) Late Triassic–Jurassic rifting between South and North America that led to the formation of the proto-Caribbean plate; this event is interpreted as half grabens controlled by fault family 1 as the east-northeast–south-southwest–striking faults; (2) Middle–Late Jurassic ...The Late Jurassic extensional regime from the Neotethyan area favoured the development of a complex system of carbonate platforms (Missoni and Gawlick 2011).In this context, shallow-water carbonates were accumulating during Jurassic, on a large crustal block belonging to the Dacia Mega Unit (Schmid et al. 2008).The Getic Carbonate Platform represents an integrating part of this system ...٣ ربيع الآخر ١٤٤٢ هـ ... These five scenarios investigate carbonate platform response to the different controls in three dimensions. To characterize the seismic ap-.The approach allows determining four neritic carbonate factories that are called the marine biochemical, photozoan, photo-C-, and heterozoan factories. The model finely simulates the global distribution of Lower Aptian and Modern carbonate platforms. Carbonate factories appear to thrive for specific ranges along the environmental gradient of ...During the Aptian-Albian transition, an extensional phase of the Central Atlantic which affected the Prebetic carbonate platform (South Iberian Continental Margin, northwestern margin of the Tethys) occurred. A graben morphology was developed in the platform coeval to a relative sea level fall. As a consequence, palustrine facies characterized by rhizoliths and some pond deposits of black ...Carbonate Platforms. Examples of hidden mechanisms that modulate CO 2 outgassing are carbonate platforms, seen in the video above. These carbonate reservoirs—formed through eons of carbonate ...The Middle Triassic shelf was characterised by pronounced temporal and spatial changes in carbonate facies and thickness, resulting into a diachronous carbonate platform (Brandner and Resch, 1981 ...Apr 28, 2020 · Carbonate platforms in the Maldives recorded similar drift bodies and moat features with the sudden onset of intense Asian summer monsoon winds at ~12.9 Ma and a predated weaker proto-monsoon 7,8 ... The approach allows determining four neritic carbonate factories that are called the marine biochemical, photozoan, photo-C-, and heterozoan factories. The model finely simulates the global distribution of Lower Aptian and Modern carbonate platforms. Carbonate factories appear to thrive for specific ranges along the environmental gradient of ...The Yangtze Block began to rift in an extensional setting at approximately 820 Ma and continued until the earliest Cambrian period, leading to the development of extensive carbonate platforms and several intraplatform basins in the middle Yangtze area, with an increase in water depth to the southeast (Gao et al., 2016; Steiner et al., 2001 ...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 ...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 ...Aptian-Albian palaeoenvironments explored in four sections on the Constantine platform, NE Algeria, are identified based on lithology, sedimentary structures, fossil content and microfacies. A mixed unattached carbonate platform is characterised by lagoonal-reefal facies during the Aptian and clastic-carbonate hemipelagic facies during the Albian. The vertical microfacies trend shows a ...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 ...Carbonate platform drowning, i.e. the sudden to gradual demise of a shallow-water carbonate factory, is common in the geological record. Eustatic sea-level changes, variations in subsidence rates and environmental effects have been identified as controlling factors for such a development (Schlager, 2005 ).The carbonate platform that forms Field EX is but one of several hundred platforms in Central Luconia, and one of innumerable buildups in the geologic record. Comparisons among these platforms indicate both broad similarities and contrasts with Field EX, in terms of size and thickness (Fig. 14) and controls. Download : Download high-res image (3MB)The second data set concerns three successions of the Vercors carbonate platform (Cretaceous, southeast France). This platform sheds silt- to pebble-sized material during both progradation and ...The second data set concerns three successions of the Vercors carbonate platform (Cretaceous, southeast France). This platform sheds silt- to pebble-sized material during both progradation and ...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 ...They indicate shallow marine carbonate platform conditions at the northern rim of the African Craton: Thick accumulations of tidal carbonate shoals interfinger with quiet-water subtidal and intertidal to supratidal strata. The paleogeographic importance of the sequence is emphasized by comparison with contemporaneous strata in Israel and ...The Bragantina Platform is an onshore basin of the Brazilian equatorial margin, including the Pirabas Formation, the youngest bioclastic-dominated formation in the area (early-middle Miocene), testifying to the final demise of carbonate factories along this margin area and the transition to a siliciclastic-dominated sedimentation.In this paper, we present sedimentological and geochemical data across two uppermost Pliensbachian to lower Toarcian shallow-marine carbonate platform successions exposed in the Tibetan Himalaya, deposited at a low latitude (∼21.8°S to ∼26.1°S) in the southern hemisphere (Fig. 1 A; Huang et al., 2015).We assess the environmental evolution of these platforms through the T-OAE, and discuss ...The studied samples from the drill-core of Site 1003A, ODP Leg 166 on the GBB. Site 1003A is situated ca. 4 km from the edge of the platform at the western margin of the GBB (Fig. 1), and located in the lower to mid-slope of the prograding margin at seawater depth of 481.4 m (Eberli, 2000; Eberli et al., 1997).We selected this drill-core/location for analyses to substantiate the importance of ...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 their metabolism.LBF carbonate platforms developed on the southern Tethyan margin between Morocco (Mo: Fig. 1 B) and the Oman-Yemen domains at paleolatitudes ranging from 20°N and the equator (Höntzsch et al., 2013; Martín-Martín et al., 2020c, Martín-Martín et al., 2021). No z-corals oldest than middle Lutetian have been reported in this realm.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 moreOne singularity of carbonate platforms is that they can drown, that is, the platform top can be submerged below the photic zone; in that case, the platform cannot catch up to sea-level and the carbonate production is irreversibly shut down (Schlager, 1981, Schlager, 1999a, Schlager, 1999b, Hallock and Schlager, 1986). The geometry and facies 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 ...Highlights Carbonate platform paired δ 13 C carb and δ 13 C org record of the early Toarcian CIE. Demise of Lithiotis/Palaeodasycladus carbonate factory at the onset of the T-OAE CIE. Palaeophysiology indicates sensitivity of hypercalcifiers to ocean acidification. Shift from biotic to chemical carbonate factory across the T-OAE. Platform …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.The formation and drowning of isolated carbonate platforms; tectonic and ecologic control of the Northern Apennines; controls on Upper Jurassic carbonate build up development …The study of exposed carbonate platforms provides observational constraints on regional tectonics and sea-level history. In this work Miocene-aged carbonate platform units of the Seroe Domi Formation are investigated on the island of Bonaire, located in the Southern Caribbean. Ground penetrating radar (GPR) was used to probe near-surface ...Carbonate platforms contains contributions from an international authorship and the volume has been edited by one of the most respected names in the earth sciences. Areas covered include; early rifting deposition; examples from carbonate sequences of Sardinia (Cambrian) and Tuscany (Triassic-Jurassic), Italy; geometry and evolution of platform ...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. ...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. 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 ...The set of units determines the type of section. Three types of sections are distinguished in domanicoid deposits, corresponding to different paleostructural zones of their accumulation: the intrashelf basin, the slope of the intrashelf basin, and the shelf of the carbonate platform.Carbonate platform marginal reefs were well developed in the upper subinterval whereas mound-shoals developed well in the lower subinterval of the Upper Ordovician Yijianfang Formation (Fig. 10). 4. Results and discussions4.1. Platform margin types. The Cambrian and Ordovician are the main carbonate successions in the Tarim Basin.In the Galala platform of Egypt, pure carbonate-ramp deposits of Paleocene age change upwards to mixed carbonate-siliciclastic deposits in the early Eocene, also testifying to a temporary crisis of the carbonate platform (Höntzsch et al., 2011). These marginal-marine carbonate successions affected by episodically intensified river discharge ...Chert is an amorphous hydrous silica that is characteristic of deep marine depositional environments. If Radiolaria are visible as white dots in the chert, it is known as Radiolarian chert. Small layers of carbonates are sometimes found in deep marine chert as a result of turbidites from carbonate platforms.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 ...Platform facies and deep-water basin facies are widely distributed. Finally, carbonate platform is drowned due to sea level rising in the Late Ordovician. The depositional evolution of carbonate platform coinciding falling and rising of sea-level changes can be beneficial for appropriate carbonate reservoirs identification and petroleum ...The Apulia Carbonate Platform (ACP) is one of the most extensive isolated carbonate domains of the Tethyan Ocean, which persisted for a long span of time (Triassic to Miocene). The Late Jurassic ...Many isolated carbonate platforms are found in this area, providing mass-wasting materials as a sediment source for MTDs. The MTDs in the study area were divided into three types (slide, slump ...Jul 1, 2022 · 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 Xisha Islands (also known as Paracel Islands) (17°07′-15°43′N, 111°11′-112°54′E) are located in the northern SCS, with its border surrounded by the Xisha Trough to the north, the Hainan shelf to the west, and the Zhongsha Trough and Sea Basin to the east and south, respectively (Fig. 1 A).The land area of the Xisha carbonate platform is about 8 km 2, which is the largest among ...Submarine sinkholes are found on carbonate platforms around the world. They are thought to form and grow when groundwater interactions generate conditions corrosive to carbonate minerals. Because their morphology can restrict mixing and water exchange, the effects of biogeochemical processes can accumulate such that the sinkhole water properties considerably diverge from the surrounding ocean ...Nov 11, 2019 · Carbonate platform distribution come from bibliographic data (see text for details). The 4 factories are defined after Michel et al. 22,28, by splitting the Schlager 9,16,17 T-factory into ... Soussi, M., Zaghbib-Turki, D., Ouribane, M. and Turki, M.M. (1996) Biosedimentary characteristics of Upper Tithonian carbonate platform in Zaghouan area (NE Tunisia) An example of isolated shallow marine platform to basin translation, in International Association of Sedimentologists, Field Trips Guide Book, 17 th IAS Regional African …This tension is explored for models of fault-associated dolomitisation by sea water convection in a syn-rift carbonate platform, evaluating the contribution of incorporating stratigraphic growth and fault propagation. Simulations of the high heat flux southern margin of the Derbyshire Platform (Northern England), with heterogeneous matrix ...Carbonate platforms associated with sea-level highstands are characterized by relatively thick aggradational-to-progra-dational geometry. They are bounded below by the top of a transgressive unit and above by a sequence boundary. Two types of highstand platform, keep-up and catch-up, are differentiated here. ...The aim of the present study is to use REE and other trace elements to explore palaeoenvironmental signatures associated with the formation of a stromatolitic carbonate platform in the 3.45 billion year old Strelley Pool Formation, Pilbara Craton, Western Australia.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 ...Standard carbonate facies models are widely used to interpret paleoenvironments, but they do not address how carbonate platforms are affected by relative changes in sea level. An understanding of how the subtidal carbonate "factory" responds to relative sea-level changes and the role played by other environmental factors towards influencing the ...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 ...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 ...The approach allows determining four neritic carbonate factories that are called the marine biochemical, photozoan, photo-C-, and heterozoan factories. The model finely simulates the global distribution of Lower Aptian and Modern carbonate platforms. Carbonate factories appear to thrive for specific ranges along the environmental gradient of ...The depositional organization and architecture of the middle–late Devonian. Yangdi rimmed carbonate platform margin in the Guilin area of South China.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. 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.The shallow submerged platform area of the Bahamas extends more than 400 km (248 mi) north-south and covers an area of about 125,000 km 2 (48,263 mi 2). ... Carbonate environments have changed substantially over geological time by comparison to siliciclastic environments; for example, the type of organism responsible for building reefs has ...During the Holocene, carbonate platform weathering and erosion related to climate and precipitation intensified. Fresh water flowed through the reef body from seepage zone to the undercurrent zone, the unstable aragonite and high-Mg calcite of the reef body are weathered and eroded (Wang et al., 2017).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 the Croatian Karst (External or Outer) Dinarides, which is very thick (in places more than 8000 m), and ranges in age from the Middle Permian (or even Upper Carboniferous) to the Eocene.The carbonate factory shut down when the platform was suffocated by siliciclastic mud sourced from the west, and tidal activity diminished as the whole basin shallowed. The interpretation of the carbonate platform presented herein is radically different from previous views that considered the Waterton and Altyn formations to be predominantly of ...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 ...Fig(2) 2-2 carbonates platform Carbonate platform is a general term widely used for mostly shallow-marine carbonate that develops along passive continental margins. Five major types of carbonate platforms having particular pattern of facies and facies succession are recognized FIG (3):- (Ginsburg and James 1974) 1. Ramp.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),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 ... Carbonate 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 ...Drowned carbonate platforms on passive margins present a paradox, because their great growth potential exceeds the typical rates of passive margin …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 the Croatian Karst (External or Outer) Dinarides, which is very thick (in places more than 8000 m), and ranges in age from the Middle Permian (or even Upper Carboniferous) to the Eocene.(A) Growth history of an isolated carbonate platform in Luconia into stages reflecting variation in carbonate production, subsidence sea-level fluctuation and terrigenuos influx (Epting, 1989).Carbonate platforms are widely developed in low-latitude shallow-water areas, not only requiring suitable seawater temperature (17~28 °C) and water depth (0~200 m), but also closely related to waves, salinity, dissolved oxygen, sediment type, nutrients, regional wind direction, etc. [1,2,3].Any change in these factors may change the development form or internal structure of the carbonate .... This tension is explored for models of fault-associated doThe overlying Campbellrand Subgroup represents a marine platform 1. Evolution. 2. Biological Factor. 3. Climatic Zone. 4. Temperature-Salinity. 5. Clastic Sediment Input. 6. Water Depth-Turbidity . The actual factory dimensions of a carbonate factory are controlled by the size of the platform and the extent of siliciclastic sedimentation while the vertical extent is controlled by the depth of the photic zone. Nov 21, 2022 · The newly collected seismic da 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.Platform morphologies and slope profiles are also factory specific: T-factories show a rimmed flat-topped platform with adjacent exponential slopes or a carbonate ramp morphology; CWC-factories display mound morphologies with steep slopes; C-factories are associated with open shelf systems and Gaussian shaped slope profiles; while M-factories ... A genetic approach considers the variability of deposit...

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