Carbonate platform

Day 2. We will begin with morning lectures on carbonate pla

The Archean carbonate platform on top a major unconformity, exposing wide areas of mafic rocks of the greenstone belt, in combination with ongoing hydrothermal activity, provided sufficient amounts of micro- and macro-nutrients, perhaps with occasional P limitation, sustaining a microbial community which may be capable of fixing carbon and ...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 growth potential of carbonate platforms, i.e., the maximum rate at which they can aggrade vertically, is difficult to assess.

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A key challenge regarding development of carbonate platforms is predicting the temporal pattern of platform-margin progradation, aggradation, retrogradation, and drowning. Numerical forward models ...@article{osti_5857813, title = {Carbonate platform facies models}, author = {Read, J F}, abstractNote = {Various types of carbonate platforms are characterized by distinctive profiles, facies, and evolutionary sequences. Ramps may be homoclinal or distally steepened, and may have fringing or barrier shoal-water complexes of ooidpellet sands or skeletal banks.To test the ocean acidification hypothesis, we have constructed a proxy record of ocean pH across the PTB using the boron isotope composition of marine carbonates (δ 11 B) ().We then used a carbon cycle model (supplementary text) to explore ocean carbonate chemistry and pH scenarios that are consistent with our δ 11 B data and published records of …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 NCB platform was uplifted during the Caledonian Taikang tectonic event in the Middle Ordovician, exposing the rocks of HC to long-term denudation until the Late Carboniferous time (Han 1990).The denudation obliterated the Middle Ordovician—Upper Carboniferous strata, forming an unconformity that span ~ 143 Ma …A carbonate slope links platform and basin-floor regions holding crucial information on the carbonate source-sink system of a vast ocean. There is a generally poor understanding of the entire process of carbonate slope deposition, failure, and subsequent transportation and redeposition etc. due to the lack of field observation and adequate ...In Florida estuaries associated with shellfish harvesting, Robbins and Lisle (2018) found that pH decreased in 8 out of 10 estuaries from 1980 to 2008 but rates of decrease were 2.0–3.4 times slower than offshore waters, possibly mitigated by the carbonate platform’s contributions to buffering capacity.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 ...The spectrum of carbonate-platform types, their heterogeneities, and their architecture is complex. Each platform succession has a distinctive and unique character that is a response to the ...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 …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). ...Eastern platform carbonate cements and their fluid inclusions exhibit decreasing δ 13 C, δ 18 O, homogenization temperatures (T h), and last ice melting (T m) values with decreasing age. Reelfoot rift dolomite and calcite cement and their fluid inclusions define a trend of decreasing δ 13 C and δ 18 O values and increasing T h and …Thus, marine carbonate platforms are not randomly distributed in the world oceans, neither in the Modern, nor in the Past 9, 24. Global mapping of carbonate platforms shows indeed that...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 ...Carbonate platforms provide valuable geological arcSpecial Publication 509 Modern seismic data have become an 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). Distribution of facies on carbonate platforms The Mega Platform is a 30- × 50-km-large and 1.2-km-thick middle Miocene carbonate platform located in the Luconia Province, offshore Sarawak, Borneo.Reef carbonates contain a good amount of hydrocarbons. 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. Carbonate platforms are open systems with natural bo

In addition to, the Aptian-Albian carbonate platform successions are recognized in boreal areas such as England, northwestern France, northwestern Germany, Canada, and in southern temperate areas ...Three 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 ...The Aptian reservoir sands were probably sourced from the east and transported across the carbonate platform that sat on top of the Outer High. The Venus reservoir is an Aptian sandstone deposited in the outer sub-basin that ponded in the accommodation space west of the Outer High (Figure 3). The light oil that was recently discovered in the ...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 ...

The second is a Mesoarchean carbonate platform in the Red Lake Greenstone Belt (RLGB), NW Ontario, Canada, which is the oldest known thick carbonate platform on Earth, deposited between 2.940 Ga and 2.925 Ga (Corfu and Wallace, 1986). This 490-meter-thick succession of sedimentary rock contains > 200 m of stromatolitic dolostone and subordinate ...The seafloor around carbonate platforms is largely shaped and modified by downslope processes. However, the role of alongslope processes, including bottom currents, on the morphological development of carbonate platforms remains poorly understood. Here, we use high-resolution multibeam bathymetric data and two-dimensional seismic profiles to investigate the detailed sea-floor morphology around ...The NCB platform was uplifted during the Caledonian Taikang tectonic event in the Middle Ordovician, exposing the rocks of HC to long-term denudation until the Late Carboniferous time (Han 1990).The denudation obliterated the Middle Ordovician—Upper Carboniferous strata, forming an unconformity that span ~ 143 Ma ……

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Carbonate platform and reservoir strata a. Possible cause: The succession of the Galala Mountains at the southern Tethyan margin (Easter.

The Upper Cretaceous carbonate platform successions preserved in the peri-Adriatic region are mainly made up of well-bedded peritidal to shallow-subtidal limestones, commonly organized in meter-scale cycles (Borgomano, 1987, Borgomano, 2000, Vlahović et al., 2005, Spalluto, 2012, Le Goff et al., 2015b).This monotonous sedimentation pattern is interrupted several times during the Late ...Carbonate platforms are classified as either carbonate ramps or rimmed shelves. A carbonate ramp has a gently sloping surface extending seaward from the …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 ...

Improved seismic data quality in the last 10–15 years, innovative use of seismic attribute combinations, extraction of geomorphological data and new quantitative techniques have significantly enhanced understanding of ancient carbonate platforms and processes. 3D data have become a fundamental toolkit for mapping carbonate depositional and diagenetic facies, and associated flow units and ...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 ...

The insights suggest that although each platform is unique in many way Abstract. The middle Miocene onset of modern ocean circulation patterns changed the growth style of isolated tropical carbonate platforms because surface and contour currents began shaping the flanks of these edifices. Since then, ocean currents have redistributed the off-bank-transported sediment, reduced sedimentation by particle sorting or ...The morphology of Carbonate platforms may be influenced by tectonic activity and eustatic variations. 3D seismic data and satellite imagery are used in order to investigate the morphological similarities between present-day carbonates platforms, East of Borneo Island and Miocene carbonate platforms of the South China Sea. Most carbonate sediments originate on a shallow-waThe Mega Platform is a 30- × 50-km-large and 1.2-km-thick middle Mio Carbonate platforms and reefs emerge, grow and die in response to intrinsic and extrinsic mechanisms forced primarily by tectonics, oceanography, climate, ecology and eustasy. These mechanisms, or controls, create the physical, biological and chemical signals accountable for the myriad of carbonate depositional responses that, together, form ...A carbonate platform is a sedimentary body which possesses topographic relief, and is composed of autochthonic calcareous deposits. [1] 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. Drowned carbonate platforms on passive margins present a paradox 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 abundance and types of reef-bearing carbonate platThe carbonate platform sediments and the atolls of the Fcarbonate platforms, it is concluded that the 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 ...Carbonate platforms of the Western Tethys Ocean exposed in Alpine Tethyan mountain ranges today offer insight into this period of environmental upheaval. In addition to informing understanding of ... The Apulia Carbonate Platform is one of the mos Jan 1, 2000 · The architecture of carbonate platform is determined by the efficiency of the carbonate factory and by the rate of creation of accommodation space, which reflect the interplay of different factors ... Carbonate platforms are classified as either carbonate ramps or rimmed shelves. A carbonate ramp has a gently sloping surface extending seaward from the coastline, with no sharp break between shallow and deep water. Rimmed shelves have a fairly sharp break where the water depth increases. aspect of carbonate platforms is the predo[The impacts of tectonism on carbonate platform. SCarbonate Debris Sheets and Turbidites, Exuma Sound, Bahamas. P. Cre Apr 1, 2014 · The morphology of Carbonate platforms may be influenced by tectonic activity and eustatic variations. 3D seismic data and satellite imagery are used in order to investigate the morphological similarities between present-day carbonates platforms, East of Borneo Island and Miocene carbonate platforms of the South China Sea.