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This study presented recently reprocessed multi-channel seismic data and multi-beam bathymetric map to reveal the geomorphology and stratigraphic architecture of the Yongle isolated carbonate platform in the Xisha Archipelago, northwestern South China Sea. Our results show that the upper slope angles of Yongle carbonate platform …The carbonate platform depositional system is sensitive to many variables, a number of which are interrelated, making it difficult to clarify how each variable affects the growth pattern of a carbonate platform. A simple computer model that simulates the carbonate platform depositional system provides an efficient means of overcoming this problem.The GC–MS analysis shows that P1m1 carbonate rock exhibits abnormal molecular fossil assemblages, such as N-alkanes with even carbon dominance, Isoalkanes with even carbon dominance iC22+, iPC21+ long chain Isoprenoid alkanes, abnormally high abundance Hopane, relatively high abundance C29 regular sterane, and high abundance …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. Carbonate platforms are among the most important archives of Earth's biological and chemical histories and hold approximately half of the world's conventional petroleum reservoirs. Understanding the biologic, chemical and physical controls on carbonate platform architecture and facies distribution is therefore critical to interpreting the ...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.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.The carbonate platform pre-dated the deposition of evaporites, such as microbial reefs, played a favorable impact for evaporite precipitation. It controls the connection between saline and open sea in terms of the global sea-level fluctuations. The Tarim Basin is one of the important intracratonic basins which have the tremendous oil and gas ...Their purely skeletal origin indicates reworking from platform edge areas (Playton et al., 2010). Interbedding of grain-dominated carbonate material and muddier packstone to floatstone deposits ...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 ...Early Proterozoic carbonate platforms are widespread and carbonate facies reveal differentiation of depositional settings strikingly similar to Phanerozoic platforms despite the absence of metazoans (Grotzinger, 1989). Two requirements are needed to create such distinction: availability of large areas with biotically favourable conditions and ...Changing components, rock textures, lithofacies, platform types and architecture throughout time are unique characteristics of carbonate rocks. Characterizing these attributes has been approached by 1) building reference models for specific Phanerozoic intervals, 2) recognizing the climatic impact in modulating carbonate production, and 3 ...Distribution of facies on carbonate platforms; rimmed vs. unrimmed platforms; cross-bedded shoal facies; autocyclic and allocyclic models for genesis of mete...The carbonate platform, where bunch of petroleum reserves are accumulated and discovered, is commonly a place with natural temporal-spatial boundaries (Red, 1985; Pomar, 2001). The boundaries of ...Finally, the upliftment and subsidence of carbonate platforms by seismicity, and tsunami incidences with storm induced log drift have generated natural impacts of the loss of mangrove forests in carbonate settings of Andaman group of islands. Mangroves of Gujarat and Maharashtra coasts are threatened due to shortages of river flows into the ...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: A general term for a thick sequence of mostly shallow-water carbonates (T ucker & Wright, 1992). This term. covers all the shallow w ater systems, such as ramps, rimmed shelves ...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).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 interpreted as direct seawater precipitates and ...Ocean anoxia has been widely implicated in the Permian-Triassic extinction. However, the duration and distribution of the ocean anoxia remains controversial. In this study, the detailed redox changes across the Permian-Triassic boundary (PTB) in the shallow platform interior at Great Bank of Guizhou (GBG) has been reconstructed based on the high-resolution microfossil composition and multiple ...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 Apulia Carbonate Platform, a main palaeogeographic domain of the Mediterranean Tethys, is characterized by huge megabreccia bodies which were deposited along its flank at various intervals ...Day 2. We will begin with morning lectures on carbonate platforms and discuss carbonate builders through geological time. We will then head to compare phylloid algal mounds, bioherms and crinoid banks. During the afternoon we will have a workshop on seismic facies of carbonate platforms using a series of seismic lines from basins across the globe.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; ...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 term carbonate platform is both a stratigraphic term for thick deposits of shallow-water carbonate rocks, and is also used to describe the following different carbonate shelf morphologies (Fig. 4). The terms carbonate platform and carbonate shelf are often used synonymously for both modern sediments and ancient rocks formed in this environment:

Carbonate platforms are characterized in terms of geometry, stratigraphic architecture, time duration, preservation rate, progradation and rates of progradation, platform type, and thickness ...Platform carbonates are a major component of the Earth system, but their spatial distribution through geological times is difficult to reconstruct, due to the incompleteness of geological records, sampling heterogeneity, and their intrinsic complexity.…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. CARBONATE AND CO 2 BUDGETS. We quantify how much CO 2 retu. Possible cause: Backstepping of carbonate platform margins is an important process for .