Carbonate platform
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 ...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)
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In general, Member 5 of the Majiagou Formation belongs to a carbonate platform facies, and the Ma5 5 submember belongs to an open platform subfacies, while the Ma5 4 to Ma5 1 submembers belong to restricted and evaporative platform subfacies (Li et al. 2012). Samples and analytical methods.The carbonate platforms in the continental rifting lacustrine environment, in the Early Cretaceous of the Campos and Santos Basin, Brazil, is a result of the breakup of the Gondwana and continuous ...The Apulia Carbonate Platform is one of the most extensive MesozoiceCenozoic shallow water domains of the Tethyan ocean (Morsilli et al., 2017 and references therein). Its deposits crop out in ...II) Platform and shelf carbonates A. Carbonate depositon mostly on platforms B. Carbonate platform is defined as: 1."a large edifice formed by the accumulation of sediment in an area of subsidence" C. Examples: rimmed platform, isolated platform, ramp. III. Platform Characteristics A. Most platforms: 1. have a flat top 2. steep sides 3. can be ...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 Adriatic Carbonate Platform (AdCP), was a separate shallowmarine depositional system characterized by a lack of terrigenous input and was connected to Gondwana towards the South via Gavrovo ...i.e., a carbonate platform corresponds to a single carbonate factory that is exclusive (sensu Sc hlager 2000 , 2003 , 2005 ; also cf. above cited ref erences).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 ... The eastern Tarim Basin (Tadong Area) has gained wide attentions on large-scale marine carbonate reservoirs in Cambrian-Ordovician due to significant hydrocarbon discoveries. A systematic analysis combining thin sections, cores, wireline logs, and seismic data is conducted on Cambrian-Ordovician carbonate platform in the whole eastern …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 …In general, Member 5 of the Majiagou Formation belongs to a carbonate platform facies, and the Ma5 5 submember belongs to an open platform subfacies, while the Ma5 4 to Ma5 1 submembers belong to restricted and evaporative platform subfacies (Li et al. 2012). Samples and analytical methods.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,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...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 alter the sedimentary structures of carbonate rocks and ...The carbonate platform and the drift deposits were balanced for circa 2 Myr, until a global sea-level fall at 10.6 Ma and later reflooding of the platform, which destroyed the equilibrium between both depositional systems, favouring the current-controlled deposits. The drowning of the Miocene carbonate platform of the Maldives was the result of ...The carbonate platforms were seeded over the continental basement following the taphrogenic period of plate tectonics. Building of carbonate ramps which characterized the Early Jurassic, has began during the transitional period between continental rifting and early drift. The second stage in construction of the carbonate platforms and offshore ...A key challenge regarding development of carbonate platforms is predicting the temporal pattern of platform-margin progradation, aggradation, retrogradation, and drowning. Numerical forward models ...First, the carbonate factory concept does not provide any prediction of local biota or grain distribution within a carbonate platform as factories are considered as …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 ...Isolated carbonate platforms of the OIB are classified as of the volcanic pedestal platform type (sensu Bosence, 2005) which developed on the top of pre-existing volcanic seamounts and ridges, surrounded by deep water settings, and therefore isolated from any terrigenous sediment supply. In essence, the spatial distribution and morphologies of ...Isolated carbonate platforms of the OIB are classified as of the volcanic pedestal platform type (sensu Bosence, 2005) which developed on the top of pre-existing volcanic seamounts and ridges, surrounded by deep water settings, and therefore isolated from any terrigenous sediment supply. In essence, the spatial distribution and morphologies of ...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 ...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 platforms are characterized in teThe seafloor south of the Al Wajh carbonate In today’s world, where environmental concerns are at the forefront of our minds, it is crucial to take responsibility for our carbon emissions. Before you can begin calculating your carbon emissions, it’s essential to have a clear understa... Thus, marine carbonate platforms are not randomly distribut 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.In general, Member 5 of the Majiagou Formation belongs to a carbonate platform facies, and the Ma5 5 submember belongs to an open platform subfacies, while the Ma5 4 to Ma5 1 submembers belong to restricted and evaporative platform subfacies (Li et al. 2012). Samples and analytical methods. Drowned carbonate platforms on passive margins present a
Carbonate platforms are open systems with natural boundaries in space and time. Across their spatial boundaries there are fluxes of energy (e.g. light, chemical energy in compounds, and kinetic energy in currents and mass flows) and matter (e.g. nutrients, dissolved gases such as CO 2, and sediment - especially, of course, carbonates).The Devonian carbonate platforms from Canning basin, Western Australia, are mostly reef-rimmed platforms flanked by steep marginal slopes (PLAYFORD, 1980 ; PLAYFORD et al, 1989 ; WARD, 1999). In this case, whereas platform-building stromatoporoids and corals seems to have been limited to shallow water, other reef-builders extended into deeper ...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 ...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 ...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 ...
Structural carbonate in the CFA and calcite cements co-occurring in partially phosphatic digitate stromatolite buildups and adjacent carbonate grainstone generally ... which support a depositional facies model of a persistently submerged, wave-swept carbonate platform environment — subtidal zone, above fair-weather wave-base (Misi and ...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 ...A key challenge regarding development of carbonate platforms is predicting the temporal pattern of platform-margin progradation, aggradation, retrogradation, and drowning.…
Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Apr 1, 2005 · Carbonate platforms are characterized in terms of geome. Possible cause: ABSTRACT Many types of carbonate platforms have been described, from homoc.
The newly collected seismic data and the existing drilling data provide a good opportunity to better understand the carbonate platform distribution characteristics and the hydrocarbon resource potential in the Xisha sea area of the South China Sea. Based on the seismic data and the reflection characteristics of the carbonate platform’s edge, three boundary indicators were established: abrupt ...This trip seeks to illustrate the succession of Cambrian and Ordovician facies deposited within the Pennsylvania and Maryland portion of the Great American Carbonate Bank. From the Early Cambrian (Dyeran) through Late Ordovician (Turinan), the Laurentian paleocontinent was rimmed by an extensive carbonate platform. During this protracted period of time, a succession of carbonate rock, more than tw41 carbonate platform wer e identi fi ed intercalated in and on top of the lower Barre mian Drusberg Mb (sequence 42 B2). Sequence boundary (SB) B3 resulted from an important regressive phase ...
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). ...The carbonate platform records the deposition of green algal grainstone, coated grain grainstone and bioclastic packstone, grainstone, floatstone and rudstone in shallow-waters, and burrowed bioclastic wackestone, microbioclastic peloidal packstone and grainstone, and fine-grained burrowed wackestone and packstone in the deep-water shelfal ...
Drowned carbonate platforms on passive margins present 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 ...These biotic carbonate platforms were commonly modified by drowning or a shift to non-skeletal carbonates during the early Toarcian, temporally consistent with the extinction of reef-building Lithiotis bivalves as well as other benthic organisms (Trecalli et al., 2012; Sabatino et al., 2013; Han et al., 2018; Jiang et al., 2020; Krencker et al ... During the Holocene, carbonate platform weathering and erosiThe seafloor around carbonate platforms is largely shaped and modif 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. Geologists can now characterize entire carbonate platform The variations of lithostratigraphy, foraminifera, geochemical elements, and organic biomarkers in well XK1 from the Xisha (Paracel) Islands reveal the history of carbonate platform development since the early Miocene in the South China Sea. Our results indicate that reef growth was more active in the middle Miocene than in any earlier periods, decreased in the late Miocene, revitalized in the ...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 ... A carbonate platform is a sedimentary body Carbonates of Central Luconia, Malaysia, had During the E-C transition, the Yangtze Block evolved from a ri Aug 13, 2022 · 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 ). 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. The carbonate platform records the deposition The Lansdowne Bank is a partly drowned, isolated carbonate platform of around 4000 km 2 located 300 km west of New Caledonia, in the SW Pacific Ocean, in water depths of 20 to 100 m. New multibeam bathymetric data, high resolution seismic reflection profiles and sediment gravity cores have been acquired on the bank top and adjacent slopes. In today’s world, where environmental concerns are at the forefrontSep 6, 2019 · However, this F margins increase Oct 27, 2020 · Carbonate and evaporitic sediments are intimately related in platform settings where evaporites are located in the relatively more restricted platform areas which appears in lateral interbedding and vertical circularity (Figs. 6, 7). Carbonates and evaporites are commonly lateral equivalents, both in carbonate-dominated environments or within ... 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 ...