Carbonate platform
This broad picture of carbonate platform development is seen in other Cambro-Ordovician platforms, as in Newfoundland and the Appalachians (e.g., James et al., 1989; Read, 1989) and in platforms of other geological periods, e.g., the Lower Carboniferous of South Wales (Wright, 1987). The North China Platform was a stable …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).
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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 ...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 ...Chattian carbonate platform is composed of a high variety of carbonate producing (Stages I, II, and III), representing a fore-Stepping stacking pattern. Aquitanian Carbonate Platform is a soft-grained carbonate ramp with a low-angle gradient comprising two different Stages: IV and V. The Burdigalian platform (Stage VI) is composed of meters to ...During the subsequent late filling stage, the carbonate platform was flooded again during the highstand, and the production rates of the carbonate factory greatly increased. The lateral progradation of carbonate platforms accelerated on the canyon of the early filling stage and further into the inner sag.A key challenge regarding development of carbonate platforms is predicting the temporal pattern of platform-margin progradation, aggradation, retrogradation, and drowning.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 ...Carbon is found in the sun and other stars formed from the debris of a previous supernova. Carbon is built up by nuclear fusion in bigger stars. Carbon exists in the atmospheres of many planets, usually as carbon dioxide.The different facies can be grouped into three facies associations that correspond to different environments of a carbonate platform with ramp geometry (homoclinal), from outer ramp (F1 and F2), mid-ramp (F3, F4 and F6) to inner ramp areas (F5 and F7). Meter-scale cycles are the basic building blocks of shallow marine …Toward the south, the Miocene Triton and Phanh Rang carbonate platform is located offshore south of Vietnam and covers more than 15000 km 2 (C and D in Fig. 1; Fyhn et al., 2009, Fyhn et al., 2013). These carbonate platforms continue to extend southward and also occur on the structural highs of the Nam Con Son Basin (E in Fig. 1; Lü et al., 2013).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 response to T-OAE conforms to model expectations for ...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 ...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 ... 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 ...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 ...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.Carbonate platform development and sea level changes in the SCS Previous research, using methods such as lithostratigraphic, stable isotopic, biostratigraphic, and benthic foraminiferal analyses ( Miller et al., 2008 , Miller et al., 2011 ), has shown that ice-volume changes and monsoon strengths have a significant impact on global sea-level ...This volume is a collection of papers, with an introduction, concerning the consequences of organism-environment interactions for modern and ancient carbonate …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 seafloor around carbonate platforms is largely shaped andFor OAE1a, this scenario also explains th The study area is located in the distal margin of the northern South China Sea (SCS), which ranges from shallow carbonate platforms to deep-sea basins . The Zhongsha Atoll (ZA) is the largest single atoll system of the SCS, forming a unique isolated carbonate platform situated in the study area.The insights suggest that although each platform is unique in many ways, Phanerozoic isolated carbonate platforms include numerous themes that are persistent across ages, sizes, settings, and ... The abundance and types of reef-bearing carbonate pla 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 ...The growth potential of carbonate platforms, i.e., the maximum rate at which they can aggrade vertically, is difficult to assess. The diagenesis of carbonate platform sedimen
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.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 ...The architecture of marine carbonate platforms result from the stratigraphic response of carbonate factories to local and global changes through geological times. We investigate the response of ...Spherics, a U.K.-based carbon accounting platform for SMEs to understand and reduce their environmental impact, has been acquired by accounting giant Sage. Spherics, a U.K.-based carbon accounting platform for SMEs to understand and reduce ...
The sedimentary environments in the study area gradually changed through time from a clastic tidal flat to a carbonate platform across the transition, which indicated a gradual rise in sea level, with anoxic conditions occurring predominantly before the RECE δ13C excursion. Microbially induced sedimentary structures and oncoids occurred widely ...Apr 1, 2005 · Carbonate platforms are characterized in terms of geometry, stratigraphic architecture, time duration, preservation rate, progradation and rates of progradation, platform type, and thickness ... 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 ...…
Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Carbonate platforms are built mainly by corals living in shallow lig. Possible cause: Abstract. Various types of carbonate platforms are characterized by distinct.
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, and debris flow) based on their rheological properties. The MTDs were mostly distributed at the toe of the carbonate platform slope, where a large ...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 ...
The 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 …Pelagic carbonate platforms (PCPs) are submarine highs that are drowned fragments of an ancestor regional peritidal carbonate platform. PCPs can be horsts or crests of rotated blocks. The extensionalWhile lacustrine carbonate systems are capable of producing small-scale platform-like depositional geometries (Platt & Wright, 1991), such as from the Eocene of the Bohai Bay Basin, China (Liu et al., 2020), the relief on such platforms was decametre in scale at best and stratigraphically thick successions are not recorded.
The quantification of carbonate constituents 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 sedimentary environments in the study area gradually changed through time from a clastic tidal flat to a carbonate platform across the transition, which indicated a gradual rise in sea level, with anoxic conditions occurring predominantly before the RECE δ13C excursion. Microbially induced sedimentary structures and oncoids occurred widely ... The term carbonate platform is both a stratigraphic term for thick dAn Attempt for Construction of Carbonate Platform Ge 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 stratigraphic forward modelling (SFM) and sensitivity analysis to examine, referenced to the Miocene Llucmajor Platform, the effect of changes of dominant biotic production in the oligophotic and euphotic ... Precambrian carbonate platforms have been Advances in Sequence Stratigraphy. Andrei Dronov, in Stratigraphy & Timescales, 2017. 3.2 The Cool-Water Carbonates. Until the very recently the Ordovician limestones of the Tungus basin on the Siberian Platform have traditionally been considered to be tropical shelf limestones (shallow-water warm sea) and interpreted using facies models derived from recent tropical carbonate environments ...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). ... Carbonate platforms are classified as either carbNov 18, 2021 · The Gattar and Bireno carbonate platforms develoGinsburg, R. N. inSubsurface Geology of a Prograding C The Cretaceous of Brazil is widely known for vast carbonate platforms that developed along the Brazilian east coast. An onshore well drilled and logged in Sergipe State on a structural low allowed the recovery and study of a continuous 439-m core section that records an interval aged from the late Albian to the early Turonian. The section is … The range of experimental conditions was chosen to bracket The Xisha Archipelago is a group of isolated carbonate platforms located in South China Sea (SCS) (Fig. 1).The Xuande Atoll is developed with an area of >600 km 2 on the north part of the Xisha Archipelago. The ongoing deposition on the Xuande Atoll (Fig. 2), thus, serve as a good candidate for examining the processes that control the … Pelagic carbonate platforms (PCPs) are submarine highs that a[carbonate platforms, it is concluded that the inun dation of carbonatThe slope of middle Miocene carbonate platf Similar carbonate fabrics may result from different pathways of precipitation and diagenetic replacement. Distinguishing the underlying mechanisms leading to a given carbonate fabric is relevant, both in terms of an environmental and diagenetic interpretation. Prominent among carbonate fabrics are aragonite botryoids and spherulites, typically …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 ...