The Latemar: A flat-topped, steep fronted platform dominated by microbialites and synsedimentary cements

Marangon, Alessandro; Gattolin, Giovanni; Porta, Giovanna Della; Preto, Nereo

doi:10.1016/j.sedgeo.2011.09.001

Cited by 58 publications

(68 citation statements)

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“…As a result, a number of modifications on the evolutionary palaeoenvironmental model of the Middle and Late Triassic carbonate environments can be suggested. Boundstone consisting of clotted micrite was previously reported as a microfacies characteristic for platform slopes from Carboniferous carbonates in the Cantabrian Mountains (Della Porta et al, 2002, 2003Kenter et al, 2005) and Triassic carbonates in the Dolomite Alps (Blendinger, 1994;Schlager, 1999, 2001;Marangon et al, 2011;Preto, 2012). The clotted micrite "boundstone" was described neither from the Aggtelek-Rudabánya Hills nor from the Northern Calcareous Alps.…”

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confidence: 93%

“…Several authors described limestone having clotted micrite microfacies as typical deposits of platform margins and slopes (Blendinger, 1994; Keim ______________________________________ ____________________ ___________________ 7. Interpretation and discussion on depositional environments and Schlager, 2001;Della Porta et al, 2002;Della Porta et al, 2003;Marangon et al, 2011;Preto, 2012). Slope facies with clotted micrite deposits fits into the carbonate shelf model of the Silica nappe .…”

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confidence: 99%

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Microfacies associations of Middle and Upper Triassic slope and basin carbonates deposited along the Neo-Tethyan margin, NE Hungary

Horváth¹,

Hips²

2015

AJES

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Microfacies types presented here are based on thin section analysis of more than 1.500 samples from drilling cores, surface sections and several outcrops from Middle and Upper Triassic slope and basin carbonates in the Aggtelek-Rudabánya Hills (Hungary).The observed compositional and textural types were grouped into five microfacies associations which are characteristic for slope and basin environments. The clotted micrite "boundstone" typically contains bioclasts, peloids and stromatactis structures. The inhomogeneous clotted micrite-rich groundmass suggests that the sediment originated from mats or mounds enriched in organic matter. Bioclastic wackestone with radiolarians, pelagic bivalve shells and signs of bioturbation was likely deposited in deep-water basinal environment. Bioclastic grainstone-packstone and bivalve-crinoid packstone deposited from turbidity currents which often occurred along the slope. The mudstones can be found after events of sudden deepening, mostly related to the drowning of the Steinalm platform. Data based on comparison of stratigraphical logs show that the Middle Triassic was characterised by rapid deepening followed by the formation and expansion of a carbonate slope. During the Late Triassic, the breakup of the Wetterstein platform had an effect on slope environment as well.Die hier präsentierten Mikrofazies-Typen basieren auf der Analyse von mehr als 1500 Proben der Region Aggtelek-Rudabanya

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confidence: 93%

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confidence: 99%

Microfacies associations of Middle and Upper Triassic slope and basin carbonates deposited along the Neo-Tethyan margin, NE Hungary

Horváth¹,

Hips²

2015

AJES

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“…Volcanoclastic sandstones (Wengen Formation) interfinger with resedimented dark bedded limestone (Perledo-Varenna or Pratotondo Limestone). The high-relief, flat-topped carbonate platform of the Esino Limestone shares several architectural similarities with other well-studied platforms in the geological record, such as the Carboniferous platforms of Spain (e.g., Della Porta et al 2003,2004 and Kazakhstan (Weber et al, 2003) or the partly coeval platforms of the Dolomites (e.g., 1999Marangon et al, 2011). Despite morphological similarities, sedimentological data indicate major differences between the Esino Limestone and the coeval platforms of the Dolomites and the similar Carboniferous platforms.…”

Section: Geological Settingmentioning

confidence: 79%

“…The carbonate factory of the Esino Limestone is thus partly different from that of other high-relief Carboniferous (e.g. Della Porta et al, 2003;2004;Kenter et al, 2005) or Triassic (Keim & Schlager, 1999;Marangon et al, 2011) carbonate platforms. In these platforms, microbial production characterizes also the slope below the photic zone, up to more than 300 m of water depth.…”

Section: Geological Settingmentioning

confidence: 90%

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Forward modelling of carbonate platforms: Sedimentological and diagenetic constraints from an application to a flat-topped greenhouse platform (Triassic, Southern Alps, Italy)

Berra

Lanfranchi

Smart³

et al. 2016

Marine and Petroleum Geology

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•We propose a quantitative analysis of a carbonate platform using 3d numerical models.• Parameter definition is critical to produce realistic 3d numerical models.• Modelling parameters were defined by architectural and sedimentological studies. •The obtained model has been tested by comparison with outcrop and laboratory data.• 3d numerical models may help to parameterise petrophysical properties of geobodies.Key words: carbonate platform, forward modelling, Triassic, facies analysis, diagenesis 2 AbstractQuantitative analysis of depositional systems using numerical models can provide insights into the interaction of sedimentological and diagenetic processes, difficult to interpret from observation of the geological products alone. Numerical models can highlight the interactions between controlling parameters, and generate best estimate simulations of case studies from the geological record. Different data sources (e.g., outcrop data, uniformitarian constraints, paleogeography) need to be considered in the process of defining the parameters required to produce models that honour individual case studies. We present a best-estimate forward model of a high-relief Triassic carbonate platform (Southern Alps, Italy) generated using CARB3D+, a 3D process-based forward modelling package able to simulate sedimentary facies, geometries and early diagenesis of isolated carbonate platforms. The parameters used for the presented forward model have been deduced by the study of architectural, sedimentological and diagenetic features of the platform, and by data from modern and ancient analogues. Sensitivity analysis is used to tune values of the parameters within ranges defined from field, laboratory and uniformitarian constraints. Critical evaluation of the model allowed 1) verification of the validity of the used parameters; 2) evaluation of the interaction between controlling parameters; 3) development of a numerical model that can be used for quantitative elaborations. Furthermore, the process of generating the numerical model required a detailed interpretation of field and laboratory data, crucial to define the required input parameters. Modelling the studied carbonate platform also enabled evaluation of the effects of the interaction between productivity, environmental energy and creation of accommodation space, promoting the understanding of their role on the architecture of carbonate systems. Forward modelling also allows the integration of data from conventional data sets with data from presentday observations and seismic geometries, promoting a transition from a qualitative to a semiquantitative/quantitative sedimentological approach. Forward models can further be used to parameterise petrophysical properties of complex geobodies, with potential application for the management of georesources.

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Geometries, Driving Factors, And Connectivity Of Background Fractures At The Latemar Carbonate Platform (N. Italy): Relevance For Subsurface Reservoir Modelling

Igbokwe

Bertotti

Mueller

et al. 2022

Preprint

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Carbonate platform background fracture networks are rarely utilized in subsurface models, and it is unclear how they relate to regional stress (other than faults and folds) and burial. We combine structural analysis and drone imagery to investigate the geometry, kinematics, and topological characteristics of (background) fractures at the Latemar platform (both limestones and dolostones; Northern Italy). Deformation was accommodated by a dense network of mode I and conjugate hybrid fractures/veins and conjugate reverse faults, all associated with sub-vertical stylolites. Conjugate fractures and associated sub-vertical stylolites are organized in two systems, constraining the major stress fields. Differences lie in the permutation of the position in the space of the principal stress with depth. Specific burial depth windows are significant in distinguishing the different spatial positions of the principal stresses. Changes in overburden provide the major driving factor in determining the position of background structures that develop during the burial trajectory. Topologically, background fractures in lime-and dolostone pavements show distinct characteristics. In limestone pavements, fractures form a network with a high proportion of I-node and I-C to C-C branches, resulting in a low to moderate connectivity (i.e., C B = ˜1.5). In dolostones, a complex network with abundant Y-to X-nodes and I-C to C-C branches is found (moderate to a high degree of connectivity C B = ˜1.7). Topological pathways provide important insights into how background fractures are connected and shed light on the significance of these features in the context of subsurface fluid flow.

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The Latemar: A flat-topped, steep fronted platform dominated by microbialites and synsedimentary cements

Cited by 58 publications

References 57 publications

Microfacies associations of Middle and Upper Triassic slope and basin carbonates deposited along the Neo-Tethyan margin, NE Hungary

Microfacies associations of Middle and Upper Triassic slope and basin carbonates deposited along the Neo-Tethyan margin, NE Hungary

Forward modelling of carbonate platforms: Sedimentological and diagenetic constraints from an application to a flat-topped greenhouse platform (Triassic, Southern Alps, Italy)

Geometries, Driving Factors, And Connectivity Of Background Fractures At The Latemar Carbonate Platform (N. Italy): Relevance For Subsurface Reservoir Modelling

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